/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/barrier.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:24:25,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:24:25,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:24:25,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:24:25,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:24:25,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:24:25,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:24:25,613 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 02:24:25,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:24:25,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:24:25,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:24:25,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:24:25,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:24:25,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:24:25,651 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:24:25,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:24:25,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:24:25,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:24:25,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:24:25,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:24:25,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:24:25,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:24:25,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:24:25,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:24:25,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:24:25,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:24:25,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:24:25,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:24:25,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:24:25,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:24:25,655 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:24:25,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:24:25,655 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:24:25,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:24:25,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:24:25,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:24:25,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:24:25,940 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:24:25,941 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:24:25,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier.wvr.bpl [2021-05-22 02:24:25,942 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier.wvr.bpl' [2021-05-22 02:24:25,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:24:25,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:24:25,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:24:25,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:24:25,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:24:25,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:25,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:24:26,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:24:26,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:24:26,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:24:26,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/1) ... [2021-05-22 02:24:26,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:24:26,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:24:26,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:24:26,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:24:26,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (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 02:24:26,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:24:26,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:24:26,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:24:26,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:24:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:24:26,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:24:26,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:24:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:24:26,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:24:26,100 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:24:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:24:26,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:24:26,101 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:24:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:24:26,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:24:26,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-22 02:24:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-22 02:24:26,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-22 02:24:26,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-05-22 02:24:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-05-22 02:24:26,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-05-22 02:24:26,104 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 02:24:26,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:24:26,275 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:24:26,276 INFO L202 PluginConnector]: Adding new model barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:24:26 BoogieIcfgContainer [2021-05-22 02:24:26,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:24:26,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:24:26,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:24:26,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:24:26,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:25" (1/2) ... [2021-05-22 02:24:26,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54da50e3 and model type barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:24:26, skipping insertion in model container [2021-05-22 02:24:26,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:24:26" (2/2) ... [2021-05-22 02:24:26,294 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier.wvr.bpl [2021-05-22 02:24:26,299 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:24:26,300 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:24:26,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:24:26,300 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:24:26,448 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-05-22 02:24:26,463 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:24:26,477 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:24:26,477 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:24:26,477 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:24:26,477 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:24:26,477 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:24:26,477 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:24:26,477 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:24:26,477 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:24:26,486 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 80 places, 65 transitions, 202 flow [2021-05-22 02:24:26,889 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7231 states, 7229 states have (on average 3.6692488587633143) internal successors, (26525), 7230 states have internal predecessors, (26525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 7231 states, 7229 states have (on average 3.6692488587633143) internal successors, (26525), 7230 states have internal predecessors, (26525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:26,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:26,978 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:26,978 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1343820696, now seen corresponding path program 1 times [2021-05-22 02:24:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:26,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002363569] [2021-05-22 02:24:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:27,156 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 02:24:27,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:27,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002363569] [2021-05-22 02:24:27,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002363569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:27,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:27,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:24:27,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386152841] [2021-05-22 02:24:27,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:24:27,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:24:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:27,202 INFO L87 Difference]: Start difference. First operand has 7231 states, 7229 states have (on average 3.6692488587633143) internal successors, (26525), 7230 states have internal predecessors, (26525), 0 states have call successors, (0), 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 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:27,321 INFO L93 Difference]: Finished difference Result 5614 states and 20074 transitions. [2021-05-22 02:24:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:24:27,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:27,386 INFO L225 Difference]: With dead ends: 5614 [2021-05-22 02:24:27,386 INFO L226 Difference]: Without dead ends: 5614 [2021-05-22 02:24:27,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2021-05-22 02:24:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 5614. [2021-05-22 02:24:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5613 states have (on average 3.5763406378050955) internal successors, (20074), 5613 states have internal predecessors, (20074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 20074 transitions. [2021-05-22 02:24:27,751 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 20074 transitions. Word has length 47 [2021-05-22 02:24:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:27,751 INFO L482 AbstractCegarLoop]: Abstraction has 5614 states and 20074 transitions. [2021-05-22 02:24:27,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 20074 transitions. [2021-05-22 02:24:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:27,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:27,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:27,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:24:27,771 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash -607358788, now seen corresponding path program 2 times [2021-05-22 02:24:27,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:27,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657547061] [2021-05-22 02:24:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:27,838 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 02:24:27,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:27,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657547061] [2021-05-22 02:24:27,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657547061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:27,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:27,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:24:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174244858] [2021-05-22 02:24:27,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:24:27,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:27,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:24:27,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:27,891 INFO L87 Difference]: Start difference. First operand 5614 states and 20074 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:27,946 INFO L93 Difference]: Finished difference Result 4822 states and 17110 transitions. [2021-05-22 02:24:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:24:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:27,975 INFO L225 Difference]: With dead ends: 4822 [2021-05-22 02:24:27,975 INFO L226 Difference]: Without dead ends: 4822 [2021-05-22 02:24:27,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2021-05-22 02:24:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 4822. [2021-05-22 02:24:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 3.5490562124040657) internal successors, (17110), 4821 states have internal predecessors, (17110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 17110 transitions. [2021-05-22 02:24:28,191 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 17110 transitions. Word has length 47 [2021-05-22 02:24:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:28,192 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 17110 transitions. [2021-05-22 02:24:28,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 17110 transitions. [2021-05-22 02:24:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:28,208 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:28,209 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:28,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:24:28,209 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1880871100, now seen corresponding path program 3 times [2021-05-22 02:24:28,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:28,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522212485] [2021-05-22 02:24:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:28,862 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 02:24:28,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:28,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522212485] [2021-05-22 02:24:28,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522212485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:28,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:28,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:24:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82117282] [2021-05-22 02:24:28,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:24:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:28,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:24:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:28,869 INFO L87 Difference]: Start difference. First operand 4822 states and 17110 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:30,441 INFO L93 Difference]: Finished difference Result 5573 states and 19644 transitions. [2021-05-22 02:24:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:24:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:30,468 INFO L225 Difference]: With dead ends: 5573 [2021-05-22 02:24:30,468 INFO L226 Difference]: Without dead ends: 5446 [2021-05-22 02:24:30,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1028.0ms TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:24:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-05-22 02:24:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5018. [2021-05-22 02:24:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 3.53757225433526) internal successors, (17748), 5017 states have internal predecessors, (17748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 17748 transitions. [2021-05-22 02:24:30,612 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 17748 transitions. Word has length 47 [2021-05-22 02:24:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:30,613 INFO L482 AbstractCegarLoop]: Abstraction has 5018 states and 17748 transitions. [2021-05-22 02:24:30,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 17748 transitions. [2021-05-22 02:24:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:30,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:30,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:30,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:24:30,627 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:30,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1097616762, now seen corresponding path program 4 times [2021-05-22 02:24:30,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:30,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016603146] [2021-05-22 02:24:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:31,003 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 02:24:31,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:31,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016603146] [2021-05-22 02:24:31,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016603146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:31,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:31,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:24:31,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697134232] [2021-05-22 02:24:31,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:24:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:24:31,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:31,005 INFO L87 Difference]: Start difference. First operand 5018 states and 17748 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:33,153 INFO L93 Difference]: Finished difference Result 7632 states and 26869 transitions. [2021-05-22 02:24:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:24:33,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:33,177 INFO L225 Difference]: With dead ends: 7632 [2021-05-22 02:24:33,177 INFO L226 Difference]: Without dead ends: 7543 [2021-05-22 02:24:33,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1296.7ms TimeCoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:24:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7543 states. [2021-05-22 02:24:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7543 to 5222. [2021-05-22 02:24:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 3.5276766902892165) internal successors, (18418), 5221 states have internal predecessors, (18418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 18418 transitions. [2021-05-22 02:24:33,380 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 18418 transitions. Word has length 47 [2021-05-22 02:24:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:33,381 INFO L482 AbstractCegarLoop]: Abstraction has 5222 states and 18418 transitions. [2021-05-22 02:24:33,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 18418 transitions. [2021-05-22 02:24:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:33,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:33,394 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:33,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:24:33,395 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash 246964854, now seen corresponding path program 5 times [2021-05-22 02:24:33,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:33,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353885241] [2021-05-22 02:24:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:33,768 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 02:24:33,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:33,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353885241] [2021-05-22 02:24:33,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353885241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:33,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:33,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:24:33,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896806848] [2021-05-22 02:24:33,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:24:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:24:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:33,770 INFO L87 Difference]: Start difference. First operand 5222 states and 18418 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:35,773 INFO L93 Difference]: Finished difference Result 8296 states and 29491 transitions. [2021-05-22 02:24:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:24:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:35,801 INFO L225 Difference]: With dead ends: 8296 [2021-05-22 02:24:35,802 INFO L226 Difference]: Without dead ends: 8193 [2021-05-22 02:24:35,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1151.7ms TimeCoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:24:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2021-05-22 02:24:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 5210. [2021-05-22 02:24:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 5209 states have (on average 3.5288923017853713) internal successors, (18382), 5209 states have internal predecessors, (18382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 18382 transitions. [2021-05-22 02:24:35,991 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 18382 transitions. Word has length 47 [2021-05-22 02:24:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:35,991 INFO L482 AbstractCegarLoop]: Abstraction has 5210 states and 18382 transitions. [2021-05-22 02:24:35,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:35,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 18382 transitions. [2021-05-22 02:24:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:36,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:36,004 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:36,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:24:36,005 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1872194890, now seen corresponding path program 6 times [2021-05-22 02:24:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:36,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827823599] [2021-05-22 02:24:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:36,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827823599] [2021-05-22 02:24:36,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827823599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:36,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:36,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:24:36,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132383895] [2021-05-22 02:24:36,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:24:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:24:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:36,298 INFO L87 Difference]: Start difference. First operand 5210 states and 18382 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:37,977 INFO L93 Difference]: Finished difference Result 6915 states and 24041 transitions. [2021-05-22 02:24:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:24:37,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:37,999 INFO L225 Difference]: With dead ends: 6915 [2021-05-22 02:24:37,999 INFO L226 Difference]: Without dead ends: 6778 [2021-05-22 02:24:38,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:24:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2021-05-22 02:24:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 5402. [2021-05-22 02:24:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5401 states have (on average 3.517867061655249) internal successors, (19000), 5401 states have internal predecessors, (19000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 19000 transitions. [2021-05-22 02:24:38,154 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 19000 transitions. Word has length 47 [2021-05-22 02:24:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:38,154 INFO L482 AbstractCegarLoop]: Abstraction has 5402 states and 19000 transitions. [2021-05-22 02:24:38,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 19000 transitions. [2021-05-22 02:24:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:38,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:38,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:38,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:24:38,167 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 443897944, now seen corresponding path program 7 times [2021-05-22 02:24:38,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:38,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695523004] [2021-05-22 02:24:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:38,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695523004] [2021-05-22 02:24:38,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695523004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:38,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:38,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:24:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356310410] [2021-05-22 02:24:38,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:24:38,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:24:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:38,489 INFO L87 Difference]: Start difference. First operand 5402 states and 19000 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:40,322 INFO L93 Difference]: Finished difference Result 7850 states and 27581 transitions. [2021-05-22 02:24:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:24:40,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:40,347 INFO L225 Difference]: With dead ends: 7850 [2021-05-22 02:24:40,347 INFO L226 Difference]: Without dead ends: 7761 [2021-05-22 02:24:40,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1141.7ms TimeCoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:24:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-05-22 02:24:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 5406. [2021-05-22 02:24:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 3.5167437557816834) internal successors, (19008), 5405 states have internal predecessors, (19008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 19008 transitions. [2021-05-22 02:24:40,492 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 19008 transitions. Word has length 47 [2021-05-22 02:24:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:40,494 INFO L482 AbstractCegarLoop]: Abstraction has 5406 states and 19008 transitions. [2021-05-22 02:24:40,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 19008 transitions. [2021-05-22 02:24:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:40,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:40,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:40,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:24:40,506 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:40,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:40,506 INFO L82 PathProgramCache]: Analyzing trace with hash -406753964, now seen corresponding path program 8 times [2021-05-22 02:24:40,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:40,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022097760] [2021-05-22 02:24:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:40,824 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 02:24:40,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022097760] [2021-05-22 02:24:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022097760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:40,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:40,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:24:40,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061113529] [2021-05-22 02:24:40,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:24:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:24:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:40,825 INFO L87 Difference]: Start difference. First operand 5406 states and 19008 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:42,690 INFO L93 Difference]: Finished difference Result 8217 states and 29113 transitions. [2021-05-22 02:24:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:24:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:42,710 INFO L225 Difference]: With dead ends: 8217 [2021-05-22 02:24:42,710 INFO L226 Difference]: Without dead ends: 8086 [2021-05-22 02:24:42,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1125.3ms TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:24:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8086 states. [2021-05-22 02:24:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8086 to 5366. [2021-05-22 02:24:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5366 states, 5365 states have (on average 3.5183597390493944) internal successors, (18876), 5365 states have internal predecessors, (18876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5366 states to 5366 states and 18876 transitions. [2021-05-22 02:24:42,868 INFO L78 Accepts]: Start accepts. Automaton has 5366 states and 18876 transitions. Word has length 47 [2021-05-22 02:24:42,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:42,868 INFO L482 AbstractCegarLoop]: Abstraction has 5366 states and 18876 transitions. [2021-05-22 02:24:42,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5366 states and 18876 transitions. [2021-05-22 02:24:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:42,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:42,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:42,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:24:42,881 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash -813197124, now seen corresponding path program 9 times [2021-05-22 02:24:42,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:42,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284197812] [2021-05-22 02:24:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:43,237 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 02:24:43,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284197812] [2021-05-22 02:24:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284197812] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:43,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:43,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:24:43,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24669916] [2021-05-22 02:24:43,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:24:43,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:24:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:43,239 INFO L87 Difference]: Start difference. First operand 5366 states and 18876 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:44,460 INFO L93 Difference]: Finished difference Result 6007 states and 21031 transitions. [2021-05-22 02:24:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:24:44,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:44,475 INFO L225 Difference]: With dead ends: 6007 [2021-05-22 02:24:44,475 INFO L226 Difference]: Without dead ends: 5880 [2021-05-22 02:24:44,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:24:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2021-05-22 02:24:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5378. [2021-05-22 02:24:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 5377 states have (on average 3.5160870373814395) internal successors, (18906), 5377 states have internal predecessors, (18906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 18906 transitions. [2021-05-22 02:24:44,609 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 18906 transitions. Word has length 47 [2021-05-22 02:24:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:44,610 INFO L482 AbstractCegarLoop]: Abstraction has 5378 states and 18906 transitions. [2021-05-22 02:24:44,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 18906 transitions. [2021-05-22 02:24:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:44,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:44,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:44,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:24:44,621 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1596451462, now seen corresponding path program 10 times [2021-05-22 02:24:44,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:44,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778785957] [2021-05-22 02:24:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:44,943 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 02:24:44,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:44,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778785957] [2021-05-22 02:24:44,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778785957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:44,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:44,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:24:44,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138850535] [2021-05-22 02:24:44,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:24:44,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:24:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:44,945 INFO L87 Difference]: Start difference. First operand 5378 states and 18906 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:46,910 INFO L93 Difference]: Finished difference Result 7954 states and 27964 transitions. [2021-05-22 02:24:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:24:46,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:46,925 INFO L225 Difference]: With dead ends: 7954 [2021-05-22 02:24:46,925 INFO L226 Difference]: Without dead ends: 7865 [2021-05-22 02:24:46,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1250.2ms TimeCoverageRelationStatistics Valid=301, Invalid=2779, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:24:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7865 states. [2021-05-22 02:24:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7865 to 5394. [2021-05-22 02:24:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5394 states, 5393 states have (on average 3.5141850547005378) internal successors, (18952), 5393 states have internal predecessors, (18952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5394 states to 5394 states and 18952 transitions. [2021-05-22 02:24:47,094 INFO L78 Accepts]: Start accepts. Automaton has 5394 states and 18952 transitions. Word has length 47 [2021-05-22 02:24:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:47,094 INFO L482 AbstractCegarLoop]: Abstraction has 5394 states and 18952 transitions. [2021-05-22 02:24:47,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5394 states and 18952 transitions. [2021-05-22 02:24:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:47,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:47,107 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:47,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:24:47,107 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1847863926, now seen corresponding path program 11 times [2021-05-22 02:24:47,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:47,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536166081] [2021-05-22 02:24:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:47,454 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 02:24:47,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:47,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536166081] [2021-05-22 02:24:47,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536166081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:47,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:47,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:24:47,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750763425] [2021-05-22 02:24:47,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:24:47,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:24:47,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:47,456 INFO L87 Difference]: Start difference. First operand 5394 states and 18952 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:49,571 INFO L93 Difference]: Finished difference Result 8522 states and 30214 transitions. [2021-05-22 02:24:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:24:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:49,586 INFO L225 Difference]: With dead ends: 8522 [2021-05-22 02:24:49,586 INFO L226 Difference]: Without dead ends: 8419 [2021-05-22 02:24:49,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1308.7ms TimeCoverageRelationStatistics Valid=328, Invalid=3212, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:24:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2021-05-22 02:24:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 5374. [2021-05-22 02:24:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5374 states, 5373 states have (on average 3.5175879396984926) internal successors, (18900), 5373 states have internal predecessors, (18900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5374 states to 5374 states and 18900 transitions. [2021-05-22 02:24:49,736 INFO L78 Accepts]: Start accepts. Automaton has 5374 states and 18900 transitions. Word has length 47 [2021-05-22 02:24:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:49,736 INFO L482 AbstractCegarLoop]: Abstraction has 5374 states and 18900 transitions. [2021-05-22 02:24:49,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5374 states and 18900 transitions. [2021-05-22 02:24:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:49,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:49,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:49,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:24:49,747 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 728726234, now seen corresponding path program 12 times [2021-05-22 02:24:49,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:49,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651934560] [2021-05-22 02:24:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:50,033 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 02:24:50,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:50,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651934560] [2021-05-22 02:24:50,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651934560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:50,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:50,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:24:50,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990907028] [2021-05-22 02:24:50,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:24:50,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:50,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:24:50,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:50,035 INFO L87 Difference]: Start difference. First operand 5374 states and 18900 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:51,289 INFO L93 Difference]: Finished difference Result 5781 states and 20210 transitions. [2021-05-22 02:24:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:24:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:51,298 INFO L225 Difference]: With dead ends: 5781 [2021-05-22 02:24:51,299 INFO L226 Difference]: Without dead ends: 5654 [2021-05-22 02:24:51,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:24:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5654 states. [2021-05-22 02:24:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5654 to 5386. [2021-05-22 02:24:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 3.5153203342618387) internal successors, (18930), 5385 states have internal predecessors, (18930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 18930 transitions. [2021-05-22 02:24:51,425 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 18930 transitions. Word has length 47 [2021-05-22 02:24:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:51,425 INFO L482 AbstractCegarLoop]: Abstraction has 5386 states and 18930 transitions. [2021-05-22 02:24:51,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 18930 transitions. [2021-05-22 02:24:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:51,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:51,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:51,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:24:51,435 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1738869802, now seen corresponding path program 13 times [2021-05-22 02:24:51,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:51,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464819381] [2021-05-22 02:24:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:51,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:51,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464819381] [2021-05-22 02:24:51,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464819381] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:51,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:51,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:24:51,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045597341] [2021-05-22 02:24:51,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:24:51,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:51,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:24:51,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:51,700 INFO L87 Difference]: Start difference. First operand 5386 states and 18930 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:52,873 INFO L93 Difference]: Finished difference Result 5850 states and 20412 transitions. [2021-05-22 02:24:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:24:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:52,886 INFO L225 Difference]: With dead ends: 5850 [2021-05-22 02:24:52,886 INFO L226 Difference]: Without dead ends: 5753 [2021-05-22 02:24:52,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:24:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2021-05-22 02:24:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5392. [2021-05-22 02:24:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 3.5141903171953257) internal successors, (18945), 5391 states have internal predecessors, (18945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 18945 transitions. [2021-05-22 02:24:53,006 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 18945 transitions. Word has length 47 [2021-05-22 02:24:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:53,006 INFO L482 AbstractCegarLoop]: Abstraction has 5392 states and 18945 transitions. [2021-05-22 02:24:53,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 18945 transitions. [2021-05-22 02:24:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:53,016 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:53,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:24:53,016 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1736195976, now seen corresponding path program 14 times [2021-05-22 02:24:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:53,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461094760] [2021-05-22 02:24:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:53,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461094760] [2021-05-22 02:24:53,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461094760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:53,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:53,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:24:53,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135459185] [2021-05-22 02:24:53,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:24:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:24:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:53,328 INFO L87 Difference]: Start difference. First operand 5392 states and 18945 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:54,577 INFO L93 Difference]: Finished difference Result 5751 states and 20107 transitions. [2021-05-22 02:24:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:24:54,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:54,587 INFO L225 Difference]: With dead ends: 5751 [2021-05-22 02:24:54,587 INFO L226 Difference]: Without dead ends: 5642 [2021-05-22 02:24:54,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:24:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-05-22 02:24:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5374. [2021-05-22 02:24:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5374 states, 5373 states have (on average 3.5168434766424714) internal successors, (18896), 5373 states have internal predecessors, (18896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5374 states to 5374 states and 18896 transitions. [2021-05-22 02:24:54,692 INFO L78 Accepts]: Start accepts. Automaton has 5374 states and 18896 transitions. Word has length 47 [2021-05-22 02:24:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:54,692 INFO L482 AbstractCegarLoop]: Abstraction has 5374 states and 18896 transitions. [2021-05-22 02:24:54,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5374 states and 18896 transitions. [2021-05-22 02:24:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:54,702 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:54,702 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:54,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:24:54,702 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1817793914, now seen corresponding path program 15 times [2021-05-22 02:24:54,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:54,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156635628] [2021-05-22 02:24:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156635628] [2021-05-22 02:24:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156635628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:54,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:54,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:24:54,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038447617] [2021-05-22 02:24:54,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:24:54,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:54,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:24:54,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:54,993 INFO L87 Difference]: Start difference. First operand 5374 states and 18896 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:56,383 INFO L93 Difference]: Finished difference Result 5967 states and 20772 transitions. [2021-05-22 02:24:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:24:56,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:56,393 INFO L225 Difference]: With dead ends: 5967 [2021-05-22 02:24:56,393 INFO L226 Difference]: Without dead ends: 5846 [2021-05-22 02:24:56,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:24:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-05-22 02:24:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 5380. [2021-05-22 02:24:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 3.5153374233128836) internal successors, (18909), 5379 states have internal predecessors, (18909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 18909 transitions. [2021-05-22 02:24:56,483 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 18909 transitions. Word has length 47 [2021-05-22 02:24:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:56,483 INFO L482 AbstractCegarLoop]: Abstraction has 5380 states and 18909 transitions. [2021-05-22 02:24:56,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 18909 transitions. [2021-05-22 02:24:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:56,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:56,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:56,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:24:56,491 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:56,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:56,491 INFO L82 PathProgramCache]: Analyzing trace with hash -905751946, now seen corresponding path program 16 times [2021-05-22 02:24:56,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:56,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432785527] [2021-05-22 02:24:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:56,755 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 02:24:56,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:56,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432785527] [2021-05-22 02:24:56,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432785527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:56,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:56,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:24:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559210750] [2021-05-22 02:24:56,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:24:56,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:24:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:56,757 INFO L87 Difference]: Start difference. First operand 5380 states and 18909 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:58,393 INFO L93 Difference]: Finished difference Result 6544 states and 22781 transitions. [2021-05-22 02:24:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:24:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:58,404 INFO L225 Difference]: With dead ends: 6544 [2021-05-22 02:24:58,404 INFO L226 Difference]: Without dead ends: 6449 [2021-05-22 02:24:58,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1035.0ms TimeCoverageRelationStatistics Valid=256, Invalid=2606, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:24:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-05-22 02:24:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 5382. [2021-05-22 02:24:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5381 states have (on average 3.5149600446013753) internal successors, (18914), 5381 states have internal predecessors, (18914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 18914 transitions. [2021-05-22 02:24:58,501 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 18914 transitions. Word has length 47 [2021-05-22 02:24:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:58,501 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 18914 transitions. [2021-05-22 02:24:58,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 18914 transitions. [2021-05-22 02:24:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:24:58,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:58,510 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:58,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:24:58,510 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash -606860268, now seen corresponding path program 17 times [2021-05-22 02:24:58,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:58,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127220927] [2021-05-22 02:24:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:58,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127220927] [2021-05-22 02:24:58,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127220927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:58,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:58,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:24:58,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740188346] [2021-05-22 02:24:58,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:24:58,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:24:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:58,773 INFO L87 Difference]: Start difference. First operand 5382 states and 18914 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:59,918 INFO L93 Difference]: Finished difference Result 5846 states and 20396 transitions. [2021-05-22 02:24:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:24:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:24:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:59,927 INFO L225 Difference]: With dead ends: 5846 [2021-05-22 02:24:59,928 INFO L226 Difference]: Without dead ends: 5749 [2021-05-22 02:24:59,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 759.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:24:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2021-05-22 02:24:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 5388. [2021-05-22 02:24:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5387 states have (on average 3.5138295897531093) internal successors, (18929), 5387 states have internal predecessors, (18929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 18929 transitions. [2021-05-22 02:25:00,013 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 18929 transitions. Word has length 47 [2021-05-22 02:25:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:00,013 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 18929 transitions. [2021-05-22 02:25:00,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 18929 transitions. [2021-05-22 02:25:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:00,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:00,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:00,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:25:00,023 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:00,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1962686518, now seen corresponding path program 18 times [2021-05-22 02:25:00,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:00,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919872738] [2021-05-22 02:25:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:00,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:00,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919872738] [2021-05-22 02:25:00,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919872738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:00,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:00,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:00,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657169836] [2021-05-22 02:25:00,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:00,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:00,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:00,287 INFO L87 Difference]: Start difference. First operand 5388 states and 18929 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:01,571 INFO L93 Difference]: Finished difference Result 5747 states and 20091 transitions. [2021-05-22 02:25:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:25:01,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:01,580 INFO L225 Difference]: With dead ends: 5747 [2021-05-22 02:25:01,580 INFO L226 Difference]: Without dead ends: 5644 [2021-05-22 02:25:01,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:25:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-05-22 02:25:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 5376. [2021-05-22 02:25:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5376 states, 5375 states have (on average 3.5164651162790697) internal successors, (18901), 5375 states have internal predecessors, (18901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5376 states to 5376 states and 18901 transitions. [2021-05-22 02:25:01,680 INFO L78 Accepts]: Start accepts. Automaton has 5376 states and 18901 transitions. Word has length 47 [2021-05-22 02:25:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:01,680 INFO L482 AbstractCegarLoop]: Abstraction has 5376 states and 18901 transitions. [2021-05-22 02:25:01,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5376 states and 18901 transitions. [2021-05-22 02:25:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:01,689 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:01,690 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:01,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:25:01,691 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:01,692 INFO L82 PathProgramCache]: Analyzing trace with hash -261669676, now seen corresponding path program 19 times [2021-05-22 02:25:01,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:01,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353244896] [2021-05-22 02:25:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:01,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353244896] [2021-05-22 02:25:01,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353244896] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:01,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:01,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:25:01,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729070033] [2021-05-22 02:25:01,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:01,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:01,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:01,939 INFO L87 Difference]: Start difference. First operand 5376 states and 18901 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,043 INFO L93 Difference]: Finished difference Result 5823 states and 20345 transitions. [2021-05-22 02:25:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:25:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,053 INFO L225 Difference]: With dead ends: 5823 [2021-05-22 02:25:03,053 INFO L226 Difference]: Without dead ends: 5686 [2021-05-22 02:25:03,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:25:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-05-22 02:25:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 5418. [2021-05-22 02:25:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 5417 states have (on average 3.5085840871330993) internal successors, (19006), 5417 states have internal predecessors, (19006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 19006 transitions. [2021-05-22 02:25:03,130 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 19006 transitions. Word has length 47 [2021-05-22 02:25:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,130 INFO L482 AbstractCegarLoop]: Abstraction has 5418 states and 19006 transitions. [2021-05-22 02:25:03,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 19006 transitions. [2021-05-22 02:25:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:03,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:25:03,137 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1070610284, now seen corresponding path program 20 times [2021-05-22 02:25:03,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724215626] [2021-05-22 02:25:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724215626] [2021-05-22 02:25:03,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724215626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:03,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478627146] [2021-05-22 02:25:03,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:03,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:03,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:03,415 INFO L87 Difference]: Start difference. First operand 5418 states and 19006 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:04,789 INFO L93 Difference]: Finished difference Result 5807 states and 20277 transitions. [2021-05-22 02:25:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:25:04,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:04,801 INFO L225 Difference]: With dead ends: 5807 [2021-05-22 02:25:04,802 INFO L226 Difference]: Without dead ends: 5662 [2021-05-22 02:25:04,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:25:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5662 states. [2021-05-22 02:25:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5662 to 5394. [2021-05-22 02:25:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5394 states, 5393 states have (on average 3.5119599480808454) internal successors, (18940), 5393 states have internal predecessors, (18940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5394 states to 5394 states and 18940 transitions. [2021-05-22 02:25:04,893 INFO L78 Accepts]: Start accepts. Automaton has 5394 states and 18940 transitions. Word has length 47 [2021-05-22 02:25:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,893 INFO L482 AbstractCegarLoop]: Abstraction has 5394 states and 18940 transitions. [2021-05-22 02:25:04,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 5394 states and 18940 transitions. [2021-05-22 02:25:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:04,902 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:04,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:25:04,902 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:04,903 INFO L82 PathProgramCache]: Analyzing trace with hash -170714506, now seen corresponding path program 21 times [2021-05-22 02:25:04,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:04,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156503257] [2021-05-22 02:25:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:05,216 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 02:25:05,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156503257] [2021-05-22 02:25:05,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156503257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:05,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:05,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:05,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590114575] [2021-05-22 02:25:05,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:05,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:05,218 INFO L87 Difference]: Start difference. First operand 5394 states and 18940 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:09,021 INFO L93 Difference]: Finished difference Result 10437 states and 36983 transitions. [2021-05-22 02:25:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 02:25:09,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:09,039 INFO L225 Difference]: With dead ends: 10437 [2021-05-22 02:25:09,039 INFO L226 Difference]: Without dead ends: 10163 [2021-05-22 02:25:09,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2385.6ms TimeCoverageRelationStatistics Valid=673, Invalid=6809, Unknown=0, NotChecked=0, Total=7482 [2021-05-22 02:25:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-05-22 02:25:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 6026. [2021-05-22 02:25:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6026 states, 6025 states have (on average 3.5100414937759337) internal successors, (21148), 6025 states have internal predecessors, (21148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 21148 transitions. [2021-05-22 02:25:09,162 INFO L78 Accepts]: Start accepts. Automaton has 6026 states and 21148 transitions. Word has length 47 [2021-05-22 02:25:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:09,162 INFO L482 AbstractCegarLoop]: Abstraction has 6026 states and 21148 transitions. [2021-05-22 02:25:09,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6026 states and 21148 transitions. [2021-05-22 02:25:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:09,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:09,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:09,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:25:09,171 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:09,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1021366414, now seen corresponding path program 22 times [2021-05-22 02:25:09,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:09,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661882409] [2021-05-22 02:25:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:09,431 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 02:25:09,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:09,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661882409] [2021-05-22 02:25:09,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661882409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:09,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:09,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:09,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767581900] [2021-05-22 02:25:09,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:09,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:09,432 INFO L87 Difference]: Start difference. First operand 6026 states and 21148 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,081 INFO L93 Difference]: Finished difference Result 10391 states and 37054 transitions. [2021-05-22 02:25:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-22 02:25:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,099 INFO L225 Difference]: With dead ends: 10391 [2021-05-22 02:25:13,099 INFO L226 Difference]: Without dead ends: 10284 [2021-05-22 02:25:13,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2234.0ms TimeCoverageRelationStatistics Valid=623, Invalid=6349, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:25:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10284 states. [2021-05-22 02:25:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10284 to 5934. [2021-05-22 02:25:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5934 states, 5933 states have (on average 3.5155907635260406) internal successors, (20858), 5933 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5934 states to 5934 states and 20858 transitions. [2021-05-22 02:25:13,218 INFO L78 Accepts]: Start accepts. Automaton has 5934 states and 20858 transitions. Word has length 47 [2021-05-22 02:25:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,218 INFO L482 AbstractCegarLoop]: Abstraction has 5934 states and 20858 transitions. [2021-05-22 02:25:13,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5934 states and 20858 transitions. [2021-05-22 02:25:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:13,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 02:25:13,229 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 659235032, now seen corresponding path program 23 times [2021-05-22 02:25:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944126703] [2021-05-22 02:25:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,481 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 02:25:13,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944126703] [2021-05-22 02:25:13,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944126703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:13,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200680665] [2021-05-22 02:25:13,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:13,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:13,482 INFO L87 Difference]: Start difference. First operand 5934 states and 20858 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:14,940 INFO L93 Difference]: Finished difference Result 6577 states and 22905 transitions. [2021-05-22 02:25:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:25:14,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:14,951 INFO L225 Difference]: With dead ends: 6577 [2021-05-22 02:25:14,952 INFO L226 Difference]: Without dead ends: 6456 [2021-05-22 02:25:14,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 926.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2230, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:25:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2021-05-22 02:25:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 5940. [2021-05-22 02:25:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 3.514227984509177) internal successors, (20871), 5939 states have internal predecessors, (20871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 20871 transitions. [2021-05-22 02:25:15,064 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 20871 transitions. Word has length 47 [2021-05-22 02:25:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:15,064 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 20871 transitions. [2021-05-22 02:25:15,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 20871 transitions. [2021-05-22 02:25:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:15,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:15,072 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:15,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 02:25:15,072 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:15,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2064310828, now seen corresponding path program 24 times [2021-05-22 02:25:15,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:15,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496696441] [2021-05-22 02:25:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:15,355 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 02:25:15,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496696441] [2021-05-22 02:25:15,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496696441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:15,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:15,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:15,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419271273] [2021-05-22 02:25:15,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:15,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:15,356 INFO L87 Difference]: Start difference. First operand 5940 states and 20871 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:17,057 INFO L93 Difference]: Finished difference Result 7065 states and 24685 transitions. [2021-05-22 02:25:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:25:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:17,069 INFO L225 Difference]: With dead ends: 7065 [2021-05-22 02:25:17,069 INFO L226 Difference]: Without dead ends: 6821 [2021-05-22 02:25:17,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1067.0ms TimeCoverageRelationStatistics Valid=252, Invalid=2610, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:25:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6821 states. [2021-05-22 02:25:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6821 to 5936. [2021-05-22 02:25:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5936 states, 5935 states have (on average 3.5149115417017693) internal successors, (20861), 5935 states have internal predecessors, (20861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 20861 transitions. [2021-05-22 02:25:17,166 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 20861 transitions. Word has length 47 [2021-05-22 02:25:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:17,166 INFO L482 AbstractCegarLoop]: Abstraction has 5936 states and 20861 transitions. [2021-05-22 02:25:17,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 20861 transitions. [2021-05-22 02:25:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:17,174 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:17,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:17,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 02:25:17,175 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1765419150, now seen corresponding path program 25 times [2021-05-22 02:25:17,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:17,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008857110] [2021-05-22 02:25:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,419 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 02:25:17,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:17,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008857110] [2021-05-22 02:25:17,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008857110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:17,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:17,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:25:17,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551921365] [2021-05-22 02:25:17,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:17,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:17,420 INFO L87 Difference]: Start difference. First operand 5936 states and 20861 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,559 INFO L93 Difference]: Finished difference Result 6458 states and 22526 transitions. [2021-05-22 02:25:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:25:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,570 INFO L225 Difference]: With dead ends: 6458 [2021-05-22 02:25:18,570 INFO L226 Difference]: Without dead ends: 6361 [2021-05-22 02:25:18,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:25:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-05-22 02:25:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5950. [2021-05-22 02:25:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5950 states, 5949 states have (on average 3.5111783493024036) internal successors, (20888), 5949 states have internal predecessors, (20888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5950 states to 5950 states and 20888 transitions. [2021-05-22 02:25:18,655 INFO L78 Accepts]: Start accepts. Automaton has 5950 states and 20888 transitions. Word has length 47 [2021-05-22 02:25:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,656 INFO L482 AbstractCegarLoop]: Abstraction has 5950 states and 20888 transitions. [2021-05-22 02:25:18,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5950 states and 20888 transitions. [2021-05-22 02:25:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:18,664 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,664 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:25:18,664 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,664 INFO L82 PathProgramCache]: Analyzing trace with hash 804127636, now seen corresponding path program 26 times [2021-05-22 02:25:18,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974474795] [2021-05-22 02:25:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,954 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 02:25:18,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974474795] [2021-05-22 02:25:18,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974474795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:18,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597964695] [2021-05-22 02:25:18,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:18,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:18,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:18,955 INFO L87 Difference]: Start difference. First operand 5950 states and 20888 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:20,208 INFO L93 Difference]: Finished difference Result 6359 states and 22221 transitions. [2021-05-22 02:25:20,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:25:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:20,219 INFO L225 Difference]: With dead ends: 6359 [2021-05-22 02:25:20,219 INFO L226 Difference]: Without dead ends: 6242 [2021-05-22 02:25:20,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 840.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1884, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:25:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6242 states. [2021-05-22 02:25:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6242 to 5924. [2021-05-22 02:25:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5923 states have (on average 3.515617085936181) internal successors, (20823), 5923 states have internal predecessors, (20823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 20823 transitions. [2021-05-22 02:25:20,307 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 20823 transitions. Word has length 47 [2021-05-22 02:25:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:20,307 INFO L482 AbstractCegarLoop]: Abstraction has 5924 states and 20823 transitions. [2021-05-22 02:25:20,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 20823 transitions. [2021-05-22 02:25:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:20,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:20,314 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:20,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 02:25:20,315 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash -234197158, now seen corresponding path program 27 times [2021-05-22 02:25:20,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:20,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356829006] [2021-05-22 02:25:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:20,581 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 02:25:20,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:20,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356829006] [2021-05-22 02:25:20,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356829006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:20,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:20,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709454855] [2021-05-22 02:25:20,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:20,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:20,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:20,582 INFO L87 Difference]: Start difference. First operand 5924 states and 20823 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:21,818 INFO L93 Difference]: Finished difference Result 6593 states and 23082 transitions. [2021-05-22 02:25:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:25:21,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:21,832 INFO L225 Difference]: With dead ends: 6593 [2021-05-22 02:25:21,833 INFO L226 Difference]: Without dead ends: 6466 [2021-05-22 02:25:21,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 823.2ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:25:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6466 states. [2021-05-22 02:25:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6466 to 5944. [2021-05-22 02:25:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5944 states, 5943 states have (on average 3.513545347467609) internal successors, (20881), 5943 states have internal predecessors, (20881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5944 states to 5944 states and 20881 transitions. [2021-05-22 02:25:21,941 INFO L78 Accepts]: Start accepts. Automaton has 5944 states and 20881 transitions. Word has length 47 [2021-05-22 02:25:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:21,941 INFO L482 AbstractCegarLoop]: Abstraction has 5944 states and 20881 transitions. [2021-05-22 02:25:21,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5944 states and 20881 transitions. [2021-05-22 02:25:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:21,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:21,954 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:21,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 02:25:21,954 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:21,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1017451496, now seen corresponding path program 28 times [2021-05-22 02:25:21,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:21,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800505616] [2021-05-22 02:25:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:22,238 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 02:25:22,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:22,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800505616] [2021-05-22 02:25:22,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800505616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:22,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:22,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:22,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724217704] [2021-05-22 02:25:22,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:22,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:22,239 INFO L87 Difference]: Start difference. First operand 5944 states and 20881 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,497 INFO L93 Difference]: Finished difference Result 9238 states and 32604 transitions. [2021-05-22 02:25:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:25:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,514 INFO L225 Difference]: With dead ends: 9238 [2021-05-22 02:25:24,514 INFO L226 Difference]: Without dead ends: 9149 [2021-05-22 02:25:24,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1372.1ms TimeCoverageRelationStatistics Valid=327, Invalid=3213, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:25:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9149 states. [2021-05-22 02:25:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9149 to 5968. [2021-05-22 02:25:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5968 states, 5967 states have (on average 3.5118149824032177) internal successors, (20955), 5967 states have internal predecessors, (20955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 20955 transitions. [2021-05-22 02:25:24,627 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 20955 transitions. Word has length 47 [2021-05-22 02:25:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,627 INFO L482 AbstractCegarLoop]: Abstraction has 5968 states and 20955 transitions. [2021-05-22 02:25:24,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 20955 transitions. [2021-05-22 02:25:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:24,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,636 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:24,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 02:25:24,636 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1868103404, now seen corresponding path program 29 times [2021-05-22 02:25:24,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110125835] [2021-05-22 02:25:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:24,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110125835] [2021-05-22 02:25:24,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110125835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:24,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:24,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440466347] [2021-05-22 02:25:24,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:24,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:24,891 INFO L87 Difference]: Start difference. First operand 5968 states and 20955 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:27,103 INFO L93 Difference]: Finished difference Result 9722 states and 34560 transitions. [2021-05-22 02:25:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:25:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:27,121 INFO L225 Difference]: With dead ends: 9722 [2021-05-22 02:25:27,121 INFO L226 Difference]: Without dead ends: 9619 [2021-05-22 02:25:27,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1250.4ms TimeCoverageRelationStatistics Valid=332, Invalid=3450, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:25:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9619 states. [2021-05-22 02:25:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9619 to 5948. [2021-05-22 02:25:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 5947 states have (on average 3.5148814528333614) internal successors, (20903), 5947 states have internal predecessors, (20903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 20903 transitions. [2021-05-22 02:25:27,227 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 20903 transitions. Word has length 47 [2021-05-22 02:25:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:27,227 INFO L482 AbstractCegarLoop]: Abstraction has 5948 states and 20903 transitions. [2021-05-22 02:25:27,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 20903 transitions. [2021-05-22 02:25:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:27,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:27,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:27,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 02:25:27,236 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1307726200, now seen corresponding path program 30 times [2021-05-22 02:25:27,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:27,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876570751] [2021-05-22 02:25:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:27,491 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 02:25:27,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:27,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876570751] [2021-05-22 02:25:27,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876570751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:27,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:27,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:27,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898433592] [2021-05-22 02:25:27,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:27,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:27,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:27,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:27,492 INFO L87 Difference]: Start difference. First operand 5948 states and 20903 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:28,668 INFO L93 Difference]: Finished difference Result 6447 states and 22511 transitions. [2021-05-22 02:25:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:25:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:28,680 INFO L225 Difference]: With dead ends: 6447 [2021-05-22 02:25:28,680 INFO L226 Difference]: Without dead ends: 6320 [2021-05-22 02:25:28,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 766.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:25:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6320 states. [2021-05-22 02:25:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6320 to 5960. [2021-05-22 02:25:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 3.512837724450411) internal successors, (20933), 5959 states have internal predecessors, (20933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 20933 transitions. [2021-05-22 02:25:28,774 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 20933 transitions. Word has length 47 [2021-05-22 02:25:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:28,774 INFO L482 AbstractCegarLoop]: Abstraction has 5960 states and 20933 transitions. [2021-05-22 02:25:28,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 20933 transitions. [2021-05-22 02:25:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:28,783 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:28,783 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:28,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 02:25:28,783 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1159869836, now seen corresponding path program 31 times [2021-05-22 02:25:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:28,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923444474] [2021-05-22 02:25:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:29,062 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 02:25:29,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:29,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923444474] [2021-05-22 02:25:29,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923444474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:29,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:29,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:29,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599116628] [2021-05-22 02:25:29,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:29,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:29,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:29,064 INFO L87 Difference]: Start difference. First operand 5960 states and 20933 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:30,399 INFO L93 Difference]: Finished difference Result 6520 states and 22721 transitions. [2021-05-22 02:25:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:25:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:30,410 INFO L225 Difference]: With dead ends: 6520 [2021-05-22 02:25:30,410 INFO L226 Difference]: Without dead ends: 6423 [2021-05-22 02:25:30,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 924.1ms TimeCoverageRelationStatistics Valid=226, Invalid=2324, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:25:30,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6423 states. [2021-05-22 02:25:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6423 to 5966. [2021-05-22 02:25:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5966 states, 5965 states have (on average 3.511818943839061) internal successors, (20948), 5965 states have internal predecessors, (20948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5966 states to 5966 states and 20948 transitions. [2021-05-22 02:25:30,537 INFO L78 Accepts]: Start accepts. Automaton has 5966 states and 20948 transitions. Word has length 47 [2021-05-22 02:25:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:30,537 INFO L482 AbstractCegarLoop]: Abstraction has 5966 states and 20948 transitions. [2021-05-22 02:25:30,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5966 states and 20948 transitions. [2021-05-22 02:25:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:30,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:30,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:30,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 02:25:30,546 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1157196010, now seen corresponding path program 32 times [2021-05-22 02:25:30,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:30,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241474322] [2021-05-22 02:25:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:30,794 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 02:25:30,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:30,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241474322] [2021-05-22 02:25:30,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241474322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:30,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:30,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:30,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165832247] [2021-05-22 02:25:30,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:30,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:30,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:30,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:30,795 INFO L87 Difference]: Start difference. First operand 5966 states and 20948 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:31,974 INFO L93 Difference]: Finished difference Result 6417 states and 22408 transitions. [2021-05-22 02:25:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:25:31,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:31,984 INFO L225 Difference]: With dead ends: 6417 [2021-05-22 02:25:31,984 INFO L226 Difference]: Without dead ends: 6308 [2021-05-22 02:25:31,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 788.8ms TimeCoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:25:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6308 states. [2021-05-22 02:25:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6308 to 5948. [2021-05-22 02:25:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 5947 states have (on average 3.514208844795695) internal successors, (20899), 5947 states have internal predecessors, (20899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 20899 transitions. [2021-05-22 02:25:32,070 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 20899 transitions. Word has length 47 [2021-05-22 02:25:32,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:32,071 INFO L482 AbstractCegarLoop]: Abstraction has 5948 states and 20899 transitions. [2021-05-22 02:25:32,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 20899 transitions. [2021-05-22 02:25:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:32,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:32,078 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:32,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 02:25:32,078 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:32,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:32,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1898173416, now seen corresponding path program 33 times [2021-05-22 02:25:32,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:32,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097937001] [2021-05-22 02:25:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:32,352 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 02:25:32,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:32,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097937001] [2021-05-22 02:25:32,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097937001] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:32,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:32,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451559058] [2021-05-22 02:25:32,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:32,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:32,353 INFO L87 Difference]: Start difference. First operand 5948 states and 20899 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:33,805 INFO L93 Difference]: Finished difference Result 6609 states and 22999 transitions. [2021-05-22 02:25:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:25:33,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:33,816 INFO L225 Difference]: With dead ends: 6609 [2021-05-22 02:25:33,816 INFO L226 Difference]: Without dead ends: 6488 [2021-05-22 02:25:33,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 989.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:25:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6488 states. [2021-05-22 02:25:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6488 to 5954. [2021-05-22 02:25:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5954 states, 5953 states have (on average 3.5128506635309926) internal successors, (20912), 5953 states have internal predecessors, (20912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5954 states to 5954 states and 20912 transitions. [2021-05-22 02:25:33,938 INFO L78 Accepts]: Start accepts. Automaton has 5954 states and 20912 transitions. Word has length 47 [2021-05-22 02:25:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:33,938 INFO L482 AbstractCegarLoop]: Abstraction has 5954 states and 20912 transitions. [2021-05-22 02:25:33,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5954 states and 20912 transitions. [2021-05-22 02:25:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:33,946 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:33,946 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:33,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 02:25:33,946 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash -326751980, now seen corresponding path program 34 times [2021-05-22 02:25:33,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:33,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406187568] [2021-05-22 02:25:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:34,189 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 02:25:34,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:34,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406187568] [2021-05-22 02:25:34,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406187568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:34,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:34,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525712209] [2021-05-22 02:25:34,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:34,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:34,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:34,191 INFO L87 Difference]: Start difference. First operand 5954 states and 20912 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:35,977 INFO L93 Difference]: Finished difference Result 7878 states and 27548 transitions. [2021-05-22 02:25:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:25:35,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:35,991 INFO L225 Difference]: With dead ends: 7878 [2021-05-22 02:25:35,991 INFO L226 Difference]: Without dead ends: 7783 [2021-05-22 02:25:35,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1059.1ms TimeCoverageRelationStatistics Valid=293, Invalid=3129, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:25:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7783 states. [2021-05-22 02:25:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7783 to 5944. [2021-05-22 02:25:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5944 states, 5943 states have (on average 3.5142184082113412) internal successors, (20885), 5943 states have internal predecessors, (20885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5944 states to 5944 states and 20885 transitions. [2021-05-22 02:25:36,091 INFO L78 Accepts]: Start accepts. Automaton has 5944 states and 20885 transitions. Word has length 47 [2021-05-22 02:25:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:36,091 INFO L482 AbstractCegarLoop]: Abstraction has 5944 states and 20885 transitions. [2021-05-22 02:25:36,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5944 states and 20885 transitions. [2021-05-22 02:25:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:36,102 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:36,102 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:36,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 02:25:36,102 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:36,102 INFO L82 PathProgramCache]: Analyzing trace with hash -27860302, now seen corresponding path program 35 times [2021-05-22 02:25:36,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:36,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028930947] [2021-05-22 02:25:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:36,396 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 02:25:36,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:36,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028930947] [2021-05-22 02:25:36,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028930947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:36,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:36,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:36,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419354880] [2021-05-22 02:25:36,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:36,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:36,397 INFO L87 Difference]: Start difference. First operand 5944 states and 20885 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:37,917 INFO L93 Difference]: Finished difference Result 6605 states and 22975 transitions. [2021-05-22 02:25:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:25:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:37,929 INFO L225 Difference]: With dead ends: 6605 [2021-05-22 02:25:37,929 INFO L226 Difference]: Without dead ends: 6508 [2021-05-22 02:25:37,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1065.0ms TimeCoverageRelationStatistics Valid=241, Invalid=2411, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:25:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6508 states. [2021-05-22 02:25:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6508 to 5952. [2021-05-22 02:25:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5952 states, 5951 states have (on average 3.5125189043858174) internal successors, (20903), 5951 states have internal predecessors, (20903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5952 states to 5952 states and 20903 transitions. [2021-05-22 02:25:38,027 INFO L78 Accepts]: Start accepts. Automaton has 5952 states and 20903 transitions. Word has length 47 [2021-05-22 02:25:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:38,027 INFO L482 AbstractCegarLoop]: Abstraction has 5952 states and 20903 transitions. [2021-05-22 02:25:38,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5952 states and 20903 transitions. [2021-05-22 02:25:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:38,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:38,035 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:38,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 02:25:38,035 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1753280812, now seen corresponding path program 36 times [2021-05-22 02:25:38,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:38,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321866134] [2021-05-22 02:25:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:38,299 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 02:25:38,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:38,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321866134] [2021-05-22 02:25:38,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321866134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:38,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:38,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:38,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652577809] [2021-05-22 02:25:38,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:38,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:38,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:38,300 INFO L87 Difference]: Start difference. First operand 5952 states and 20903 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:39,539 INFO L93 Difference]: Finished difference Result 6502 states and 22662 transitions. [2021-05-22 02:25:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:25:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:39,550 INFO L225 Difference]: With dead ends: 6502 [2021-05-22 02:25:39,551 INFO L226 Difference]: Without dead ends: 6399 [2021-05-22 02:25:39,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 814.0ms TimeCoverageRelationStatistics Valid=219, Invalid=2133, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:25:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6399 states. [2021-05-22 02:25:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6399 to 5940. [2021-05-22 02:25:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 3.5149014985687828) internal successors, (20875), 5939 states have internal predecessors, (20875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 20875 transitions. [2021-05-22 02:25:39,636 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 20875 transitions. Word has length 47 [2021-05-22 02:25:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:39,636 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 20875 transitions. [2021-05-22 02:25:39,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 20875 transitions. [2021-05-22 02:25:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:39,643 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:39,643 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:39,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 02:25:39,643 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash 392123308, now seen corresponding path program 37 times [2021-05-22 02:25:39,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:39,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544568789] [2021-05-22 02:25:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:39,903 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 02:25:39,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:39,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544568789] [2021-05-22 02:25:39,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544568789] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:39,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:39,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:39,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794430974] [2021-05-22 02:25:39,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:39,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:39,904 INFO L87 Difference]: Start difference. First operand 5940 states and 20875 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:41,030 INFO L93 Difference]: Finished difference Result 6361 states and 22242 transitions. [2021-05-22 02:25:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:25:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:41,040 INFO L225 Difference]: With dead ends: 6361 [2021-05-22 02:25:41,041 INFO L226 Difference]: Without dead ends: 6234 [2021-05-22 02:25:41,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:25:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2021-05-22 02:25:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 5976. [2021-05-22 02:25:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 5975 states have (on average 3.5128033472803346) internal successors, (20989), 5975 states have internal predecessors, (20989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 20989 transitions. [2021-05-22 02:25:41,126 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 20989 transitions. Word has length 47 [2021-05-22 02:25:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:41,126 INFO L482 AbstractCegarLoop]: Abstraction has 5976 states and 20989 transitions. [2021-05-22 02:25:41,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 20989 transitions. [2021-05-22 02:25:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:41,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:41,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:41,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 02:25:41,135 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:41,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2075472728, now seen corresponding path program 38 times [2021-05-22 02:25:41,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:41,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473819797] [2021-05-22 02:25:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:41,414 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 02:25:41,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:41,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473819797] [2021-05-22 02:25:41,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473819797] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:41,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:41,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:41,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776582822] [2021-05-22 02:25:41,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:41,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:41,415 INFO L87 Difference]: Start difference. First operand 5976 states and 20989 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:42,639 INFO L93 Difference]: Finished difference Result 6440 states and 22471 transitions. [2021-05-22 02:25:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:25:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:42,650 INFO L225 Difference]: With dead ends: 6440 [2021-05-22 02:25:42,650 INFO L226 Difference]: Without dead ends: 6343 [2021-05-22 02:25:42,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 813.2ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:25:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2021-05-22 02:25:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 5982. [2021-05-22 02:25:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5982 states, 5981 states have (on average 3.5117873265340243) internal successors, (21004), 5981 states have internal predecessors, (21004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5982 states to 5982 states and 21004 transitions. [2021-05-22 02:25:42,738 INFO L78 Accepts]: Start accepts. Automaton has 5982 states and 21004 transitions. Word has length 47 [2021-05-22 02:25:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:42,738 INFO L482 AbstractCegarLoop]: Abstraction has 5982 states and 21004 transitions. [2021-05-22 02:25:42,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5982 states and 21004 transitions. [2021-05-22 02:25:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:42,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:42,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:42,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 02:25:42,746 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2072798902, now seen corresponding path program 39 times [2021-05-22 02:25:42,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:42,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458088618] [2021-05-22 02:25:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:42,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:42,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458088618] [2021-05-22 02:25:42,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458088618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:42,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:42,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:42,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956637224] [2021-05-22 02:25:42,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:42,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:42,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:42,995 INFO L87 Difference]: Start difference. First operand 5982 states and 21004 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:44,076 INFO L93 Difference]: Finished difference Result 6331 states and 22139 transitions. [2021-05-22 02:25:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:25:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:44,087 INFO L225 Difference]: With dead ends: 6331 [2021-05-22 02:25:44,087 INFO L226 Difference]: Without dead ends: 6222 [2021-05-22 02:25:44,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 712.3ms TimeCoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:25:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-05-22 02:25:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5964. [2021-05-22 02:25:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 3.512829112862653) internal successors, (20947), 5963 states have internal predecessors, (20947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 20947 transitions. [2021-05-22 02:25:44,209 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 20947 transitions. Word has length 47 [2021-05-22 02:25:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:44,209 INFO L482 AbstractCegarLoop]: Abstraction has 5964 states and 20947 transitions. [2021-05-22 02:25:44,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 20947 transitions. [2021-05-22 02:25:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:44,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:44,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:44,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 02:25:44,217 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1973112992, now seen corresponding path program 40 times [2021-05-22 02:25:44,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:44,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533008544] [2021-05-22 02:25:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:44,456 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 02:25:44,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:44,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533008544] [2021-05-22 02:25:44,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533008544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:44,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:44,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:25:44,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399380707] [2021-05-22 02:25:44,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:44,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:44,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:44,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:44,458 INFO L87 Difference]: Start difference. First operand 5964 states and 20947 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:45,687 INFO L93 Difference]: Finished difference Result 6401 states and 22402 transitions. [2021-05-22 02:25:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:25:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:45,698 INFO L225 Difference]: With dead ends: 6401 [2021-05-22 02:25:45,699 INFO L226 Difference]: Without dead ends: 6256 [2021-05-22 02:25:45,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 815.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:25:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-05-22 02:25:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5976. [2021-05-22 02:25:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 5975 states have (on average 3.510794979079498) internal successors, (20977), 5975 states have internal predecessors, (20977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 20977 transitions. [2021-05-22 02:25:45,787 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 20977 transitions. Word has length 47 [2021-05-22 02:25:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:45,788 INFO L482 AbstractCegarLoop]: Abstraction has 5976 states and 20977 transitions. [2021-05-22 02:25:45,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 20977 transitions. [2021-05-22 02:25:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:45,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:45,799 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:45,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 02:25:45,799 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:45,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1255583042, now seen corresponding path program 41 times [2021-05-22 02:25:45,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:45,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922282521] [2021-05-22 02:25:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:46,077 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 02:25:46,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:46,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922282521] [2021-05-22 02:25:46,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922282521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:46,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:46,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:46,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566306220] [2021-05-22 02:25:46,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:46,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:46,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:46,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:46,078 INFO L87 Difference]: Start difference. First operand 5976 states and 20977 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:47,372 INFO L93 Difference]: Finished difference Result 6422 states and 22406 transitions. [2021-05-22 02:25:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:25:47,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:47,384 INFO L225 Difference]: With dead ends: 6422 [2021-05-22 02:25:47,384 INFO L226 Difference]: Without dead ends: 6325 [2021-05-22 02:25:47,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 868.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:25:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6325 states. [2021-05-22 02:25:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6325 to 5982. [2021-05-22 02:25:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5982 states, 5981 states have (on average 3.5097809730814244) internal successors, (20992), 5981 states have internal predecessors, (20992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5982 states to 5982 states and 20992 transitions. [2021-05-22 02:25:47,480 INFO L78 Accepts]: Start accepts. Automaton has 5982 states and 20992 transitions. Word has length 47 [2021-05-22 02:25:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:47,480 INFO L482 AbstractCegarLoop]: Abstraction has 5982 states and 20992 transitions. [2021-05-22 02:25:47,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 5982 states and 20992 transitions. [2021-05-22 02:25:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:47,489 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:47,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:47,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 02:25:47,489 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1252909216, now seen corresponding path program 42 times [2021-05-22 02:25:47,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:47,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665843901] [2021-05-22 02:25:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665843901] [2021-05-22 02:25:47,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665843901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:47,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:47,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:47,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052158058] [2021-05-22 02:25:47,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:47,835 INFO L87 Difference]: Start difference. First operand 5982 states and 20992 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:48,946 INFO L93 Difference]: Finished difference Result 6307 states and 22053 transitions. [2021-05-22 02:25:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:25:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:48,956 INFO L225 Difference]: With dead ends: 6307 [2021-05-22 02:25:48,957 INFO L226 Difference]: Without dead ends: 6174 [2021-05-22 02:25:48,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:25:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2021-05-22 02:25:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 5940. [2021-05-22 02:25:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 3.5135544704495705) internal successors, (20867), 5939 states have internal predecessors, (20867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 20867 transitions. [2021-05-22 02:25:49,043 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 20867 transitions. Word has length 47 [2021-05-22 02:25:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:49,043 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 20867 transitions. [2021-05-22 02:25:49,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 20867 transitions. [2021-05-22 02:25:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:49,051 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:49,051 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:49,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 02:25:49,051 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -439671468, now seen corresponding path program 43 times [2021-05-22 02:25:49,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:49,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29671241] [2021-05-22 02:25:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:49,299 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 02:25:49,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:49,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29671241] [2021-05-22 02:25:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29671241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:49,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:49,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:49,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767878201] [2021-05-22 02:25:49,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:49,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:49,301 INFO L87 Difference]: Start difference. First operand 5940 states and 20867 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:50,568 INFO L93 Difference]: Finished difference Result 6586 states and 23006 transitions. [2021-05-22 02:25:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:25:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:50,580 INFO L225 Difference]: With dead ends: 6586 [2021-05-22 02:25:50,580 INFO L226 Difference]: Without dead ends: 6401 [2021-05-22 02:25:50,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 856.6ms TimeCoverageRelationStatistics Valid=238, Invalid=2414, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:25:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-05-22 02:25:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 5944. [2021-05-22 02:25:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5944 states, 5943 states have (on average 3.512872286723877) internal successors, (20877), 5943 states have internal predecessors, (20877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5944 states to 5944 states and 20877 transitions. [2021-05-22 02:25:50,672 INFO L78 Accepts]: Start accepts. Automaton has 5944 states and 20877 transitions. Word has length 47 [2021-05-22 02:25:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:50,672 INFO L482 AbstractCegarLoop]: Abstraction has 5944 states and 20877 transitions. [2021-05-22 02:25:50,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5944 states and 20877 transitions. [2021-05-22 02:25:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:50,680 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:50,680 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:50,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 02:25:50,680 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash -557163210, now seen corresponding path program 44 times [2021-05-22 02:25:50,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:50,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711505723] [2021-05-22 02:25:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:50,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:50,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711505723] [2021-05-22 02:25:50,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711505723] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:50,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:50,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:50,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167078884] [2021-05-22 02:25:50,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:50,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:50,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:50,978 INFO L87 Difference]: Start difference. First operand 5944 states and 20877 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:52,296 INFO L93 Difference]: Finished difference Result 6678 states and 23209 transitions. [2021-05-22 02:25:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:25:52,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:52,307 INFO L225 Difference]: With dead ends: 6678 [2021-05-22 02:25:52,307 INFO L226 Difference]: Without dead ends: 6541 [2021-05-22 02:25:52,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 950.8ms TimeCoverageRelationStatistics Valid=243, Invalid=2409, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:25:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2021-05-22 02:25:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 5950. [2021-05-22 02:25:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5950 states, 5949 states have (on average 3.511514540258867) internal successors, (20890), 5949 states have internal predecessors, (20890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5950 states to 5950 states and 20890 transitions. [2021-05-22 02:25:52,393 INFO L78 Accepts]: Start accepts. Automaton has 5950 states and 20890 transitions. Word has length 47 [2021-05-22 02:25:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:52,393 INFO L482 AbstractCegarLoop]: Abstraction has 5950 states and 20890 transitions. [2021-05-22 02:25:52,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5950 states and 20890 transitions. [2021-05-22 02:25:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:52,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:52,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:52,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 02:25:52,401 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1014258226, now seen corresponding path program 45 times [2021-05-22 02:25:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:52,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114131073] [2021-05-22 02:25:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:52,648 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 02:25:52,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:52,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114131073] [2021-05-22 02:25:52,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114131073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:52,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:52,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:52,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305283323] [2021-05-22 02:25:52,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:52,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:52,649 INFO L87 Difference]: Start difference. First operand 5950 states and 20890 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:55,152 INFO L93 Difference]: Finished difference Result 9988 states and 35005 transitions. [2021-05-22 02:25:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:25:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:55,170 INFO L225 Difference]: With dead ends: 9988 [2021-05-22 02:25:55,170 INFO L226 Difference]: Without dead ends: 9893 [2021-05-22 02:25:55,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1371.3ms TimeCoverageRelationStatistics Valid=394, Invalid=4718, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:25:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9893 states. [2021-05-22 02:25:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9893 to 5948. [2021-05-22 02:25:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 5947 states have (on average 3.512863628720363) internal successors, (20891), 5947 states have internal predecessors, (20891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 20891 transitions. [2021-05-22 02:25:55,278 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 20891 transitions. Word has length 47 [2021-05-22 02:25:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:55,278 INFO L482 AbstractCegarLoop]: Abstraction has 5948 states and 20891 transitions. [2021-05-22 02:25:55,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 20891 transitions. [2021-05-22 02:25:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:55,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:55,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:55,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-22 02:25:55,287 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:55,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1313149904, now seen corresponding path program 46 times [2021-05-22 02:25:55,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:55,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356434207] [2021-05-22 02:25:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:55,603 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 02:25:55,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:55,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356434207] [2021-05-22 02:25:55,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356434207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:55,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:55,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:55,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548038733] [2021-05-22 02:25:55,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:55,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:55,605 INFO L87 Difference]: Start difference. First operand 5948 states and 20891 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:56,945 INFO L93 Difference]: Finished difference Result 6579 states and 22906 transitions. [2021-05-22 02:25:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:25:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:56,960 INFO L225 Difference]: With dead ends: 6579 [2021-05-22 02:25:56,960 INFO L226 Difference]: Without dead ends: 6482 [2021-05-22 02:25:56,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 961.9ms TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:25:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6482 states. [2021-05-22 02:25:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6482 to 5956. [2021-05-22 02:25:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 5955 states have (on average 3.5111670864819478) internal successors, (20909), 5955 states have internal predecessors, (20909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 20909 transitions. [2021-05-22 02:25:57,049 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 20909 transitions. Word has length 47 [2021-05-22 02:25:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:57,049 INFO L482 AbstractCegarLoop]: Abstraction has 5956 states and 20909 transitions. [2021-05-22 02:25:57,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 20909 transitions. [2021-05-22 02:25:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:57,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:57,057 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:57,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-22 02:25:57,058 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:57,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash -412270606, now seen corresponding path program 47 times [2021-05-22 02:25:57,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:57,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5740222] [2021-05-22 02:25:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:57,355 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 02:25:57,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:57,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5740222] [2021-05-22 02:25:57,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5740222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:57,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:57,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:25:57,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88754594] [2021-05-22 02:25:57,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:57,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:57,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:57,356 INFO L87 Difference]: Start difference. First operand 5956 states and 20909 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:58,517 INFO L93 Difference]: Finished difference Result 6464 states and 22553 transitions. [2021-05-22 02:25:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:25:58,517 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:25:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:58,527 INFO L225 Difference]: With dead ends: 6464 [2021-05-22 02:25:58,527 INFO L226 Difference]: Without dead ends: 6365 [2021-05-22 02:25:58,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 838.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:25:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2021-05-22 02:25:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 5948. [2021-05-22 02:25:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 5947 states have (on average 3.51252732470153) internal successors, (20889), 5947 states have internal predecessors, (20889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 20889 transitions. [2021-05-22 02:25:58,610 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 20889 transitions. Word has length 47 [2021-05-22 02:25:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:58,611 INFO L482 AbstractCegarLoop]: Abstraction has 5948 states and 20889 transitions. [2021-05-22 02:25:58,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 20889 transitions. [2021-05-22 02:25:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:25:58,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:58,618 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:58,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-22 02:25:58,618 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 663473958, now seen corresponding path program 48 times [2021-05-22 02:25:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:58,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607745029] [2021-05-22 02:25:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:58,897 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 02:25:58,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:58,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607745029] [2021-05-22 02:25:58,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607745029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:58,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:58,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:25:58,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751827893] [2021-05-22 02:25:58,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:58,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:58,898 INFO L87 Difference]: Start difference. First operand 5948 states and 20889 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:00,039 INFO L93 Difference]: Finished difference Result 6385 states and 22344 transitions. [2021-05-22 02:26:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:26:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:00,050 INFO L225 Difference]: With dead ends: 6385 [2021-05-22 02:26:00,050 INFO L226 Difference]: Without dead ends: 6240 [2021-05-22 02:26:00,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 777.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:26:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6240 states. [2021-05-22 02:26:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6240 to 5960. [2021-05-22 02:26:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 3.5104883369692903) internal successors, (20919), 5959 states have internal predecessors, (20919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 20919 transitions. [2021-05-22 02:26:00,137 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 20919 transitions. Word has length 47 [2021-05-22 02:26:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:00,138 INFO L482 AbstractCegarLoop]: Abstraction has 5960 states and 20919 transitions. [2021-05-22 02:26:00,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 20919 transitions. [2021-05-22 02:26:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:00,145 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:00,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:00,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-22 02:26:00,145 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1279978748, now seen corresponding path program 49 times [2021-05-22 02:26:00,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:00,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719029646] [2021-05-22 02:26:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:00,414 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 02:26:00,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:00,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719029646] [2021-05-22 02:26:00,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719029646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:00,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:00,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:00,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242857229] [2021-05-22 02:26:00,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:00,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:00,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:00,416 INFO L87 Difference]: Start difference. First operand 5960 states and 20919 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:01,692 INFO L93 Difference]: Finished difference Result 6406 states and 22348 transitions. [2021-05-22 02:26:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:26:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:01,703 INFO L225 Difference]: With dead ends: 6406 [2021-05-22 02:26:01,703 INFO L226 Difference]: Without dead ends: 6309 [2021-05-22 02:26:01,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 882.8ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:26:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6309 states. [2021-05-22 02:26:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6309 to 5966. [2021-05-22 02:26:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5966 states, 5965 states have (on average 3.5094719195305952) internal successors, (20934), 5965 states have internal predecessors, (20934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5966 states to 5966 states and 20934 transitions. [2021-05-22 02:26:01,788 INFO L78 Accepts]: Start accepts. Automaton has 5966 states and 20934 transitions. Word has length 47 [2021-05-22 02:26:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:01,789 INFO L482 AbstractCegarLoop]: Abstraction has 5966 states and 20934 transitions. [2021-05-22 02:26:01,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5966 states and 20934 transitions. [2021-05-22 02:26:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:01,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:01,797 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:01,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-22 02:26:01,797 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1289568038, now seen corresponding path program 50 times [2021-05-22 02:26:01,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:01,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566807678] [2021-05-22 02:26:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:02,036 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 02:26:02,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:02,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566807678] [2021-05-22 02:26:02,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566807678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:02,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:02,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:02,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828194882] [2021-05-22 02:26:02,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:02,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:02,037 INFO L87 Difference]: Start difference. First operand 5966 states and 20934 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:03,119 INFO L93 Difference]: Finished difference Result 6291 states and 21995 transitions. [2021-05-22 02:26:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:26:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:03,131 INFO L225 Difference]: With dead ends: 6291 [2021-05-22 02:26:03,131 INFO L226 Difference]: Without dead ends: 6170 [2021-05-22 02:26:03,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 711.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1708, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:26:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2021-05-22 02:26:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 5936. [2021-05-22 02:26:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5936 states, 5935 states have (on average 3.5142375737152487) internal successors, (20857), 5935 states have internal predecessors, (20857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 20857 transitions. [2021-05-22 02:26:03,221 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 20857 transitions. Word has length 47 [2021-05-22 02:26:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:03,221 INFO L482 AbstractCegarLoop]: Abstraction has 5936 states and 20857 transitions. [2021-05-22 02:26:03,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 20857 transitions. [2021-05-22 02:26:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:03,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:03,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:03,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-22 02:26:03,230 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:03,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:03,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1335783944, now seen corresponding path program 51 times [2021-05-22 02:26:03,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:03,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391272151] [2021-05-22 02:26:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:03,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391272151] [2021-05-22 02:26:03,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391272151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:03,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:03,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:26:03,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146900557] [2021-05-22 02:26:03,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:26:03,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:26:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:26:03,470 INFO L87 Difference]: Start difference. First operand 5936 states and 20857 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:04,455 INFO L93 Difference]: Finished difference Result 6489 states and 22676 transitions. [2021-05-22 02:26:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:26:04,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:04,466 INFO L225 Difference]: With dead ends: 6489 [2021-05-22 02:26:04,467 INFO L226 Difference]: Without dead ends: 6352 [2021-05-22 02:26:04,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:26:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6352 states. [2021-05-22 02:26:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6352 to 5952. [2021-05-22 02:26:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5952 states, 5951 states have (on average 3.5138632162661736) internal successors, (20911), 5951 states have internal predecessors, (20911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5952 states to 5952 states and 20911 transitions. [2021-05-22 02:26:04,559 INFO L78 Accepts]: Start accepts. Automaton has 5952 states and 20911 transitions. Word has length 47 [2021-05-22 02:26:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:04,560 INFO L482 AbstractCegarLoop]: Abstraction has 5952 states and 20911 transitions. [2021-05-22 02:26:04,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5952 states and 20911 transitions. [2021-05-22 02:26:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:04,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:04,569 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:04,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-22 02:26:04,569 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash 526843336, now seen corresponding path program 52 times [2021-05-22 02:26:04,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:04,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211141345] [2021-05-22 02:26:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:04,826 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 02:26:04,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:04,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211141345] [2021-05-22 02:26:04,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211141345] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:04,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:04,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:04,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434768774] [2021-05-22 02:26:04,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:04,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:04,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:04,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:04,827 INFO L87 Difference]: Start difference. First operand 5952 states and 20911 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:05,961 INFO L93 Difference]: Finished difference Result 6473 states and 22620 transitions. [2021-05-22 02:26:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:26:05,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:05,972 INFO L225 Difference]: With dead ends: 6473 [2021-05-22 02:26:05,972 INFO L226 Difference]: Without dead ends: 6328 [2021-05-22 02:26:05,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 742.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:26:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-05-22 02:26:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 6016. [2021-05-22 02:26:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 3.508395677472984) internal successors, (21103), 6015 states have internal predecessors, (21103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 21103 transitions. [2021-05-22 02:26:06,058 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 21103 transitions. Word has length 47 [2021-05-22 02:26:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:06,058 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 21103 transitions. [2021-05-22 02:26:06,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 21103 transitions. [2021-05-22 02:26:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:06,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:06,065 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:06,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-22 02:26:06,065 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:06,065 INFO L82 PathProgramCache]: Analyzing trace with hash 253187976, now seen corresponding path program 53 times [2021-05-22 02:26:06,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:06,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775739976] [2021-05-22 02:26:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:06,289 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 02:26:06,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:06,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775739976] [2021-05-22 02:26:06,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775739976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:06,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:06,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:06,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566036176] [2021-05-22 02:26:06,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:06,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:06,291 INFO L87 Difference]: Start difference. First operand 6016 states and 21103 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:07,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:07,345 INFO L93 Difference]: Finished difference Result 6521 states and 22796 transitions. [2021-05-22 02:26:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:26:07,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:07,356 INFO L225 Difference]: With dead ends: 6521 [2021-05-22 02:26:07,357 INFO L226 Difference]: Without dead ends: 6272 [2021-05-22 02:26:07,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:26:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2021-05-22 02:26:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 5952. [2021-05-22 02:26:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5952 states, 5951 states have (on average 3.511174592505461) internal successors, (20895), 5951 states have internal predecessors, (20895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5952 states to 5952 states and 20895 transitions. [2021-05-22 02:26:07,442 INFO L78 Accepts]: Start accepts. Automaton has 5952 states and 20895 transitions. Word has length 47 [2021-05-22 02:26:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:07,442 INFO L482 AbstractCegarLoop]: Abstraction has 5952 states and 20895 transitions. [2021-05-22 02:26:07,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5952 states and 20895 transitions. [2021-05-22 02:26:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:07,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:07,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:07,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-22 02:26:07,450 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:07,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1988507238, now seen corresponding path program 54 times [2021-05-22 02:26:07,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:07,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913604142] [2021-05-22 02:26:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:07,684 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 02:26:07,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:07,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913604142] [2021-05-22 02:26:07,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913604142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:07,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:07,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:07,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88507759] [2021-05-22 02:26:07,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:07,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:07,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:07,685 INFO L87 Difference]: Start difference. First operand 5952 states and 20895 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:08,784 INFO L93 Difference]: Finished difference Result 6409 states and 22380 transitions. [2021-05-22 02:26:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:26:08,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:08,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:08,796 INFO L225 Difference]: With dead ends: 6409 [2021-05-22 02:26:08,796 INFO L226 Difference]: Without dead ends: 6272 [2021-05-22 02:26:08,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:26:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2021-05-22 02:26:08,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 5970. [2021-05-22 02:26:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5970 states, 5969 states have (on average 3.5081253141229687) internal successors, (20940), 5969 states have internal predecessors, (20940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5970 states to 5970 states and 20940 transitions. [2021-05-22 02:26:08,881 INFO L78 Accepts]: Start accepts. Automaton has 5970 states and 20940 transitions. Word has length 47 [2021-05-22 02:26:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:08,881 INFO L482 AbstractCegarLoop]: Abstraction has 5970 states and 20940 transitions. [2021-05-22 02:26:08,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5970 states and 20940 transitions. [2021-05-22 02:26:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:08,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:08,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:08,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-22 02:26:08,889 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:08,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1179566630, now seen corresponding path program 55 times [2021-05-22 02:26:08,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:08,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3353929] [2021-05-22 02:26:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:09,134 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 02:26:09,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:09,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3353929] [2021-05-22 02:26:09,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3353929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:09,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:09,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:09,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435505113] [2021-05-22 02:26:09,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:09,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:09,135 INFO L87 Difference]: Start difference. First operand 5970 states and 20940 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:10,293 INFO L93 Difference]: Finished difference Result 6393 states and 22312 transitions. [2021-05-22 02:26:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:26:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:10,304 INFO L225 Difference]: With dead ends: 6393 [2021-05-22 02:26:10,304 INFO L226 Difference]: Without dead ends: 6248 [2021-05-22 02:26:10,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 744.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1799, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:26:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6248 states. [2021-05-22 02:26:10,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6248 to 5970. [2021-05-22 02:26:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5970 states, 5969 states have (on average 3.50712012062322) internal successors, (20934), 5969 states have internal predecessors, (20934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5970 states to 5970 states and 20934 transitions. [2021-05-22 02:26:10,389 INFO L78 Accepts]: Start accepts. Automaton has 5970 states and 20934 transitions. Word has length 47 [2021-05-22 02:26:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:10,390 INFO L482 AbstractCegarLoop]: Abstraction has 5970 states and 20934 transitions. [2021-05-22 02:26:10,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5970 states and 20934 transitions. [2021-05-22 02:26:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:10,397 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:10,397 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:10,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-22 02:26:10,397 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2079462408, now seen corresponding path program 56 times [2021-05-22 02:26:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:10,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419000908] [2021-05-22 02:26:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:10,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419000908] [2021-05-22 02:26:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419000908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:10,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:10,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:10,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503355948] [2021-05-22 02:26:10,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:10,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:10,651 INFO L87 Difference]: Start difference. First operand 5970 states and 20934 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:14,231 INFO L93 Difference]: Finished difference Result 11008 states and 39096 transitions. [2021-05-22 02:26:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-22 02:26:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:14,250 INFO L225 Difference]: With dead ends: 11008 [2021-05-22 02:26:14,250 INFO L226 Difference]: Without dead ends: 10871 [2021-05-22 02:26:14,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 2030.2ms TimeCoverageRelationStatistics Valid=609, Invalid=6363, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:26:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-05-22 02:26:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 6020. [2021-05-22 02:26:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6020 states, 6019 states have (on average 3.507227114138561) internal successors, (21110), 6019 states have internal predecessors, (21110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 21110 transitions. [2021-05-22 02:26:14,363 INFO L78 Accepts]: Start accepts. Automaton has 6020 states and 21110 transitions. Word has length 47 [2021-05-22 02:26:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:14,363 INFO L482 AbstractCegarLoop]: Abstraction has 6020 states and 21110 transitions. [2021-05-22 02:26:14,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6020 states and 21110 transitions. [2021-05-22 02:26:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:14,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:14,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:14,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-22 02:26:14,371 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1228810500, now seen corresponding path program 57 times [2021-05-22 02:26:14,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:14,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100076563] [2021-05-22 02:26:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:14,610 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 02:26:14,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:14,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100076563] [2021-05-22 02:26:14,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100076563] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:14,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:14,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:14,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482970286] [2021-05-22 02:26:14,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:14,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:14,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:14,612 INFO L87 Difference]: Start difference. First operand 6020 states and 21110 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:18,013 INFO L93 Difference]: Finished difference Result 11027 states and 39284 transitions. [2021-05-22 02:26:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:26:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:18,034 INFO L225 Difference]: With dead ends: 11027 [2021-05-22 02:26:18,034 INFO L226 Difference]: Without dead ends: 10920 [2021-05-22 02:26:18,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1921.0ms TimeCoverageRelationStatistics Valid=568, Invalid=6074, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:26:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10920 states. [2021-05-22 02:26:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10920 to 5998. [2021-05-22 02:26:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 5997 states have (on average 3.510255127563782) internal successors, (21051), 5997 states have internal predecessors, (21051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 21051 transitions. [2021-05-22 02:26:18,153 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 21051 transitions. Word has length 47 [2021-05-22 02:26:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:18,154 INFO L482 AbstractCegarLoop]: Abstraction has 5998 states and 21051 transitions. [2021-05-22 02:26:18,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 21051 transitions. [2021-05-22 02:26:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:18,161 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:18,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:18,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-22 02:26:18,162 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:18,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1385555350, now seen corresponding path program 58 times [2021-05-22 02:26:18,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:18,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701627380] [2021-05-22 02:26:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:18,396 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 02:26:18,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:18,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701627380] [2021-05-22 02:26:18,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701627380] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:18,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:18,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:18,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401807092] [2021-05-22 02:26:18,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:18,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:18,397 INFO L87 Difference]: Start difference. First operand 5998 states and 21051 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:19,658 INFO L93 Difference]: Finished difference Result 6601 states and 22970 transitions. [2021-05-22 02:26:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:26:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:19,670 INFO L225 Difference]: With dead ends: 6601 [2021-05-22 02:26:19,670 INFO L226 Difference]: Without dead ends: 6480 [2021-05-22 02:26:19,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 832.0ms TimeCoverageRelationStatistics Valid=210, Invalid=2142, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:26:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-05-22 02:26:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 6004. [2021-05-22 02:26:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6004 states, 6003 states have (on average 3.508912210561386) internal successors, (21064), 6003 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6004 states to 6004 states and 21064 transitions. [2021-05-22 02:26:19,758 INFO L78 Accepts]: Start accepts. Automaton has 6004 states and 21064 transitions. Word has length 47 [2021-05-22 02:26:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:19,758 INFO L482 AbstractCegarLoop]: Abstraction has 6004 states and 21064 transitions. [2021-05-22 02:26:19,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6004 states and 21064 transitions. [2021-05-22 02:26:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:19,766 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:19,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:19,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-22 02:26:19,766 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:19,766 INFO L82 PathProgramCache]: Analyzing trace with hash 185866086, now seen corresponding path program 59 times [2021-05-22 02:26:19,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:19,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831210928] [2021-05-22 02:26:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:20,021 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 02:26:20,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:20,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831210928] [2021-05-22 02:26:20,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831210928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:20,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:20,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594204212] [2021-05-22 02:26:20,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:20,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:20,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:20,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:20,022 INFO L87 Difference]: Start difference. First operand 6004 states and 21064 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:21,770 INFO L93 Difference]: Finished difference Result 7445 states and 26088 transitions. [2021-05-22 02:26:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:26:21,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:21,782 INFO L225 Difference]: With dead ends: 7445 [2021-05-22 02:26:21,783 INFO L226 Difference]: Without dead ends: 7201 [2021-05-22 02:26:21,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1028.3ms TimeCoverageRelationStatistics Valid=258, Invalid=2822, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:26:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-05-22 02:26:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 6072. [2021-05-22 02:26:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6072 states, 6071 states have (on average 3.5065063416241147) internal successors, (21288), 6071 states have internal predecessors, (21288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 21288 transitions. [2021-05-22 02:26:21,878 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 21288 transitions. Word has length 47 [2021-05-22 02:26:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:21,878 INFO L482 AbstractCegarLoop]: Abstraction has 6072 states and 21288 transitions. [2021-05-22 02:26:21,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 21288 transitions. [2021-05-22 02:26:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:21,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:21,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:21,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-22 02:26:21,889 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash 484757764, now seen corresponding path program 60 times [2021-05-22 02:26:21,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:21,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367520874] [2021-05-22 02:26:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:22,165 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 02:26:22,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367520874] [2021-05-22 02:26:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367520874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:22,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:22,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:22,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158648003] [2021-05-22 02:26:22,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:22,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:22,166 INFO L87 Difference]: Start difference. First operand 6072 states and 21288 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:23,406 INFO L93 Difference]: Finished difference Result 6570 states and 22873 transitions. [2021-05-22 02:26:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:26:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:23,418 INFO L225 Difference]: With dead ends: 6570 [2021-05-22 02:26:23,418 INFO L226 Difference]: Without dead ends: 6473 [2021-05-22 02:26:23,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:26:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-05-22 02:26:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 6086. [2021-05-22 02:26:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 6085 states have (on average 3.5028759244042726) internal successors, (21315), 6085 states have internal predecessors, (21315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 21315 transitions. [2021-05-22 02:26:23,505 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 21315 transitions. Word has length 47 [2021-05-22 02:26:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:23,505 INFO L482 AbstractCegarLoop]: Abstraction has 6086 states and 21315 transitions. [2021-05-22 02:26:23,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 21315 transitions. [2021-05-22 02:26:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:23,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:23,513 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:23,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-22 02:26:23,513 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:23,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:23,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1240662746, now seen corresponding path program 61 times [2021-05-22 02:26:23,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:23,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328822246] [2021-05-22 02:26:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:23,794 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 02:26:23,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:23,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328822246] [2021-05-22 02:26:23,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328822246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:23,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:23,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:23,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126563718] [2021-05-22 02:26:23,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:23,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:23,795 INFO L87 Difference]: Start difference. First operand 6086 states and 21315 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:24,909 INFO L93 Difference]: Finished difference Result 6455 states and 22520 transitions. [2021-05-22 02:26:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:26:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:24,920 INFO L225 Difference]: With dead ends: 6455 [2021-05-22 02:26:24,920 INFO L226 Difference]: Without dead ends: 6350 [2021-05-22 02:26:24,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 767.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:26:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2021-05-22 02:26:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 6072. [2021-05-22 02:26:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6072 states, 6071 states have (on average 3.505518036567287) internal successors, (21282), 6071 states have internal predecessors, (21282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 21282 transitions. [2021-05-22 02:26:25,010 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 21282 transitions. Word has length 47 [2021-05-22 02:26:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:25,010 INFO L482 AbstractCegarLoop]: Abstraction has 6072 states and 21282 transitions. [2021-05-22 02:26:25,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 21282 transitions. [2021-05-22 02:26:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:25,018 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:25,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:25,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-22 02:26:25,018 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1995258442, now seen corresponding path program 62 times [2021-05-22 02:26:25,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:25,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407144082] [2021-05-22 02:26:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:25,267 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 02:26:25,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:25,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407144082] [2021-05-22 02:26:25,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407144082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:25,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:25,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:25,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379771812] [2021-05-22 02:26:25,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:25,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:25,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:25,268 INFO L87 Difference]: Start difference. First operand 6072 states and 21282 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:26,485 INFO L93 Difference]: Finished difference Result 6712 states and 23400 transitions. [2021-05-22 02:26:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:26:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:26,496 INFO L225 Difference]: With dead ends: 6712 [2021-05-22 02:26:26,496 INFO L226 Difference]: Without dead ends: 6527 [2021-05-22 02:26:26,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:26:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2021-05-22 02:26:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 6076. [2021-05-22 02:26:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6076 states, 6075 states have (on average 3.504855967078189) internal successors, (21292), 6075 states have internal predecessors, (21292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6076 states to 6076 states and 21292 transitions. [2021-05-22 02:26:26,585 INFO L78 Accepts]: Start accepts. Automaton has 6076 states and 21292 transitions. Word has length 47 [2021-05-22 02:26:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:26,585 INFO L482 AbstractCegarLoop]: Abstraction has 6076 states and 21292 transitions. [2021-05-22 02:26:26,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6076 states and 21292 transitions. [2021-05-22 02:26:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:26,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:26,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:26,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-22 02:26:26,593 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2112750184, now seen corresponding path program 63 times [2021-05-22 02:26:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:26,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954967016] [2021-05-22 02:26:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:26,828 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 02:26:26,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:26,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954967016] [2021-05-22 02:26:26,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954967016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:26,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:26,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:26,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461509086] [2021-05-22 02:26:26,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:26,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:26,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:26,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:26,829 INFO L87 Difference]: Start difference. First operand 6076 states and 21292 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:28,076 INFO L93 Difference]: Finished difference Result 6804 states and 23603 transitions. [2021-05-22 02:26:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:26:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:28,087 INFO L225 Difference]: With dead ends: 6804 [2021-05-22 02:26:28,087 INFO L226 Difference]: Without dead ends: 6667 [2021-05-22 02:26:28,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:26:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-05-22 02:26:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6082. [2021-05-22 02:26:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6082 states, 6081 states have (on average 3.5035356026969247) internal successors, (21305), 6081 states have internal predecessors, (21305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6082 states to 6082 states and 21305 transitions. [2021-05-22 02:26:28,172 INFO L78 Accepts]: Start accepts. Automaton has 6082 states and 21305 transitions. Word has length 47 [2021-05-22 02:26:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:28,172 INFO L482 AbstractCegarLoop]: Abstraction has 6082 states and 21305 transitions. [2021-05-22 02:26:28,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6082 states and 21305 transitions. [2021-05-22 02:26:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:28,180 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:28,180 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:28,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-22 02:26:28,180 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:28,180 INFO L82 PathProgramCache]: Analyzing trace with hash -541328748, now seen corresponding path program 64 times [2021-05-22 02:26:28,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:28,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617314068] [2021-05-22 02:26:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:28,470 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 02:26:28,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:28,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617314068] [2021-05-22 02:26:28,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617314068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:28,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:28,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:28,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809077039] [2021-05-22 02:26:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:28,471 INFO L87 Difference]: Start difference. First operand 6082 states and 21305 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:31,069 INFO L93 Difference]: Finished difference Result 11009 states and 38579 transitions. [2021-05-22 02:26:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:26:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:31,088 INFO L225 Difference]: With dead ends: 11009 [2021-05-22 02:26:31,088 INFO L226 Difference]: Without dead ends: 10769 [2021-05-22 02:26:31,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 1386.7ms TimeCoverageRelationStatistics Valid=381, Invalid=4449, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:26:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2021-05-22 02:26:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 6106. [2021-05-22 02:26:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6106 states, 6105 states have (on average 3.500900900900901) internal successors, (21373), 6105 states have internal predecessors, (21373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6106 states to 6106 states and 21373 transitions. [2021-05-22 02:26:31,203 INFO L78 Accepts]: Start accepts. Automaton has 6106 states and 21373 transitions. Word has length 47 [2021-05-22 02:26:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:31,203 INFO L482 AbstractCegarLoop]: Abstraction has 6106 states and 21373 transitions. [2021-05-22 02:26:31,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6106 states and 21373 transitions. [2021-05-22 02:26:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:31,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:31,211 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:31,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-22 02:26:31,211 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -242437070, now seen corresponding path program 65 times [2021-05-22 02:26:31,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:31,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331105920] [2021-05-22 02:26:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:31,493 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 02:26:31,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:31,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331105920] [2021-05-22 02:26:31,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331105920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:31,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:31,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:31,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373413319] [2021-05-22 02:26:31,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:31,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:31,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:31,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:31,495 INFO L87 Difference]: Start difference. First operand 6106 states and 21373 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:32,757 INFO L93 Difference]: Finished difference Result 6731 states and 23367 transitions. [2021-05-22 02:26:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:26:32,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:32,769 INFO L225 Difference]: With dead ends: 6731 [2021-05-22 02:26:32,769 INFO L226 Difference]: Without dead ends: 6634 [2021-05-22 02:26:32,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 862.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:26:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6634 states. [2021-05-22 02:26:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6634 to 6114. [2021-05-22 02:26:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 6113 states have (on average 3.499263863896614) internal successors, (21391), 6113 states have internal predecessors, (21391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 21391 transitions. [2021-05-22 02:26:32,905 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 21391 transitions. Word has length 47 [2021-05-22 02:26:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:32,905 INFO L482 AbstractCegarLoop]: Abstraction has 6114 states and 21391 transitions. [2021-05-22 02:26:32,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 21391 transitions. [2021-05-22 02:26:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:32,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:32,913 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:32,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-22 02:26:32,913 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1967857580, now seen corresponding path program 66 times [2021-05-22 02:26:32,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:32,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107321528] [2021-05-22 02:26:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:33,142 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 02:26:33,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:33,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107321528] [2021-05-22 02:26:33,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107321528] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:33,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:33,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:33,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136212005] [2021-05-22 02:26:33,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:33,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:33,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:33,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:33,143 INFO L87 Difference]: Start difference. First operand 6114 states and 21391 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:34,172 INFO L93 Difference]: Finished difference Result 6616 states and 23014 transitions. [2021-05-22 02:26:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:26:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:34,184 INFO L225 Difference]: With dead ends: 6616 [2021-05-22 02:26:34,184 INFO L226 Difference]: Without dead ends: 6517 [2021-05-22 02:26:34,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 685.3ms TimeCoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:26:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6517 states. [2021-05-22 02:26:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6517 to 6106. [2021-05-22 02:26:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6106 states, 6105 states have (on average 3.5005733005733006) internal successors, (21371), 6105 states have internal predecessors, (21371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6106 states to 6106 states and 21371 transitions. [2021-05-22 02:26:34,273 INFO L78 Accepts]: Start accepts. Automaton has 6106 states and 21371 transitions. Word has length 47 [2021-05-22 02:26:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:34,273 INFO L482 AbstractCegarLoop]: Abstraction has 6106 states and 21371 transitions. [2021-05-22 02:26:34,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6106 states and 21371 transitions. [2021-05-22 02:26:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:34,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:34,281 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:34,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-22 02:26:34,281 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash -892113016, now seen corresponding path program 67 times [2021-05-22 02:26:34,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:34,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157475392] [2021-05-22 02:26:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:34,505 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 02:26:34,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:34,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157475392] [2021-05-22 02:26:34,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157475392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:34,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:34,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:34,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108934267] [2021-05-22 02:26:34,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:34,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:34,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:34,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:34,506 INFO L87 Difference]: Start difference. First operand 6106 states and 21371 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:35,552 INFO L93 Difference]: Finished difference Result 6537 states and 22805 transitions. [2021-05-22 02:26:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:26:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:35,563 INFO L225 Difference]: With dead ends: 6537 [2021-05-22 02:26:35,563 INFO L226 Difference]: Without dead ends: 6392 [2021-05-22 02:26:35,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 679.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:26:35,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2021-05-22 02:26:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 6118. [2021-05-22 02:26:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6118 states, 6117 states have (on average 3.4986104299493217) internal successors, (21401), 6117 states have internal predecessors, (21401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6118 states to 6118 states and 21401 transitions. [2021-05-22 02:26:35,670 INFO L78 Accepts]: Start accepts. Automaton has 6118 states and 21401 transitions. Word has length 47 [2021-05-22 02:26:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:35,671 INFO L482 AbstractCegarLoop]: Abstraction has 6118 states and 21401 transitions. [2021-05-22 02:26:35,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6118 states and 21401 transitions. [2021-05-22 02:26:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:35,680 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:35,680 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:35,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-22 02:26:35,680 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:35,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1459401574, now seen corresponding path program 68 times [2021-05-22 02:26:35,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:35,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775840565] [2021-05-22 02:26:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:35,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:35,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775840565] [2021-05-22 02:26:35,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775840565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:35,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:35,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762799488] [2021-05-22 02:26:35,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:35,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:35,921 INFO L87 Difference]: Start difference. First operand 6118 states and 21401 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:37,054 INFO L93 Difference]: Finished difference Result 6558 states and 22809 transitions. [2021-05-22 02:26:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:26:37,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:37,066 INFO L225 Difference]: With dead ends: 6558 [2021-05-22 02:26:37,066 INFO L226 Difference]: Without dead ends: 6461 [2021-05-22 02:26:37,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:26:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2021-05-22 02:26:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 6124. [2021-05-22 02:26:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 6123 states have (on average 3.497631879797485) internal successors, (21416), 6123 states have internal predecessors, (21416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 21416 transitions. [2021-05-22 02:26:37,155 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 21416 transitions. Word has length 47 [2021-05-22 02:26:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:37,155 INFO L482 AbstractCegarLoop]: Abstraction has 6124 states and 21416 transitions. [2021-05-22 02:26:37,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 21416 transitions. [2021-05-22 02:26:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:37,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:37,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:37,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-22 02:26:37,163 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash -266018936, now seen corresponding path program 69 times [2021-05-22 02:26:37,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:37,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381247321] [2021-05-22 02:26:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:37,396 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 02:26:37,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:37,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381247321] [2021-05-22 02:26:37,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381247321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:37,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:37,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:37,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406176482] [2021-05-22 02:26:37,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:37,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:37,397 INFO L87 Difference]: Start difference. First operand 6124 states and 21416 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:38,385 INFO L93 Difference]: Finished difference Result 6443 states and 22456 transitions. [2021-05-22 02:26:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:26:38,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:38,395 INFO L225 Difference]: With dead ends: 6443 [2021-05-22 02:26:38,395 INFO L226 Difference]: Without dead ends: 6282 [2021-05-22 02:26:38,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 649.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:26:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6282 states. [2021-05-22 02:26:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6282 to 6054. [2021-05-22 02:26:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 3.5081777630926814) internal successors, (21235), 6053 states have internal predecessors, (21235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 21235 transitions. [2021-05-22 02:26:38,478 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 21235 transitions. Word has length 47 [2021-05-22 02:26:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:38,478 INFO L482 AbstractCegarLoop]: Abstraction has 6054 states and 21235 transitions. [2021-05-22 02:26:38,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 21235 transitions. [2021-05-22 02:26:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:38,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:38,485 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:38,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-22 02:26:38,485 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1367624742, now seen corresponding path program 70 times [2021-05-22 02:26:38,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:38,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915544643] [2021-05-22 02:26:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:38,720 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 02:26:38,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:38,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915544643] [2021-05-22 02:26:38,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915544643] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:38,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:38,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:26:38,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562247267] [2021-05-22 02:26:38,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:26:38,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:38,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:26:38,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:26:38,721 INFO L87 Difference]: Start difference. First operand 6054 states and 21235 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:39,736 INFO L93 Difference]: Finished difference Result 6791 states and 23680 transitions. [2021-05-22 02:26:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:26:39,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:39,748 INFO L225 Difference]: With dead ends: 6791 [2021-05-22 02:26:39,748 INFO L226 Difference]: Without dead ends: 6654 [2021-05-22 02:26:39,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:26:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-05-22 02:26:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 6074. [2021-05-22 02:26:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6074 states, 6073 states have (on average 3.507492178494978) internal successors, (21301), 6073 states have internal predecessors, (21301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6074 states to 6074 states and 21301 transitions. [2021-05-22 02:26:39,831 INFO L78 Accepts]: Start accepts. Automaton has 6074 states and 21301 transitions. Word has length 47 [2021-05-22 02:26:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:39,831 INFO L482 AbstractCegarLoop]: Abstraction has 6074 states and 21301 transitions. [2021-05-22 02:26:39,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 6074 states and 21301 transitions. [2021-05-22 02:26:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:39,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:39,839 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:39,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-22 02:26:39,839 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash 150071480, now seen corresponding path program 71 times [2021-05-22 02:26:39,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:39,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651524857] [2021-05-22 02:26:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:40,065 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 02:26:40,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:40,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651524857] [2021-05-22 02:26:40,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651524857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:40,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:40,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:40,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815894978] [2021-05-22 02:26:40,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:40,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:40,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:40,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:40,068 INFO L87 Difference]: Start difference. First operand 6074 states and 21301 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:41,105 INFO L93 Difference]: Finished difference Result 6850 states and 23839 transitions. [2021-05-22 02:26:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:26:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:41,116 INFO L225 Difference]: With dead ends: 6850 [2021-05-22 02:26:41,116 INFO L226 Difference]: Without dead ends: 6761 [2021-05-22 02:26:41,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 700.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:26:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-05-22 02:26:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6170. [2021-05-22 02:26:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 6169 states have (on average 3.500891554546928) internal successors, (21597), 6169 states have internal predecessors, (21597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 21597 transitions. [2021-05-22 02:26:41,200 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 21597 transitions. Word has length 47 [2021-05-22 02:26:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:41,200 INFO L482 AbstractCegarLoop]: Abstraction has 6170 states and 21597 transitions. [2021-05-22 02:26:41,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 21597 transitions. [2021-05-22 02:26:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:41,208 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:41,208 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:41,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-22 02:26:41,208 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash 584100826, now seen corresponding path program 72 times [2021-05-22 02:26:41,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:41,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56305328] [2021-05-22 02:26:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:41,424 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 02:26:41,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:41,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56305328] [2021-05-22 02:26:41,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56305328] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:41,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:41,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:41,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670474994] [2021-05-22 02:26:41,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:41,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:41,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:41,425 INFO L87 Difference]: Start difference. First operand 6170 states and 21597 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:42,525 INFO L93 Difference]: Finished difference Result 6839 states and 23808 transitions. [2021-05-22 02:26:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:26:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:42,536 INFO L225 Difference]: With dead ends: 6839 [2021-05-22 02:26:42,536 INFO L226 Difference]: Without dead ends: 6614 [2021-05-22 02:26:42,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 709.3ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:26:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6614 states. [2021-05-22 02:26:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6614 to 6144. [2021-05-22 02:26:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6144 states, 6143 states have (on average 3.501220901839492) internal successors, (21508), 6143 states have internal predecessors, (21508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6144 states to 6144 states and 21508 transitions. [2021-05-22 02:26:42,654 INFO L78 Accepts]: Start accepts. Automaton has 6144 states and 21508 transitions. Word has length 47 [2021-05-22 02:26:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:42,654 INFO L482 AbstractCegarLoop]: Abstraction has 6144 states and 21508 transitions. [2021-05-22 02:26:42,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6144 states and 21508 transitions. [2021-05-22 02:26:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:42,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:42,662 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:42,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-22 02:26:42,662 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:42,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2145534312, now seen corresponding path program 73 times [2021-05-22 02:26:42,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:42,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523834334] [2021-05-22 02:26:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:42,897 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 02:26:42,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:42,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523834334] [2021-05-22 02:26:42,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523834334] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:42,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:42,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:42,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362939673] [2021-05-22 02:26:42,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:42,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:42,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:42,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:42,898 INFO L87 Difference]: Start difference. First operand 6144 states and 21508 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:43,947 INFO L93 Difference]: Finished difference Result 6842 states and 23813 transitions. [2021-05-22 02:26:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:26:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:43,959 INFO L225 Difference]: With dead ends: 6842 [2021-05-22 02:26:43,960 INFO L226 Difference]: Without dead ends: 6753 [2021-05-22 02:26:43,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:26:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6753 states. [2021-05-22 02:26:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6753 to 6168. [2021-05-22 02:26:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6168 states, 6167 states have (on average 3.4999189233014434) internal successors, (21584), 6167 states have internal predecessors, (21584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6168 states to 6168 states and 21584 transitions. [2021-05-22 02:26:44,053 INFO L78 Accepts]: Start accepts. Automaton has 6168 states and 21584 transitions. Word has length 47 [2021-05-22 02:26:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:44,053 INFO L482 AbstractCegarLoop]: Abstraction has 6168 states and 21584 transitions. [2021-05-22 02:26:44,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6168 states and 21584 transitions. [2021-05-22 02:26:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:44,061 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:44,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:44,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-22 02:26:44,062 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1715403638, now seen corresponding path program 74 times [2021-05-22 02:26:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774036211] [2021-05-22 02:26:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:44,281 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 02:26:44,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:44,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774036211] [2021-05-22 02:26:44,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774036211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:44,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:44,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:44,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940868577] [2021-05-22 02:26:44,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:44,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:44,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:44,282 INFO L87 Difference]: Start difference. First operand 6168 states and 21584 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:45,401 INFO L93 Difference]: Finished difference Result 6866 states and 23889 transitions. [2021-05-22 02:26:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:26:45,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:45,412 INFO L225 Difference]: With dead ends: 6866 [2021-05-22 02:26:45,412 INFO L226 Difference]: Without dead ends: 6761 [2021-05-22 02:26:45,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 725.0ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:26:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-05-22 02:26:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6160. [2021-05-22 02:26:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.4999188179899337) internal successors, (21556), 6159 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21556 transitions. [2021-05-22 02:26:45,496 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21556 transitions. Word has length 47 [2021-05-22 02:26:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:45,496 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21556 transitions. [2021-05-22 02:26:45,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21556 transitions. [2021-05-22 02:26:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:45,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:45,504 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:45,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-22 02:26:45,504 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash -442469930, now seen corresponding path program 75 times [2021-05-22 02:26:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:45,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858415000] [2021-05-22 02:26:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:45,765 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 02:26:45,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:45,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858415000] [2021-05-22 02:26:45,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858415000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:45,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:45,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:45,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954632743] [2021-05-22 02:26:45,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:45,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:45,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:45,766 INFO L87 Difference]: Start difference. First operand 6160 states and 21556 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:46,864 INFO L93 Difference]: Finished difference Result 6767 states and 23590 transitions. [2021-05-22 02:26:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:26:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:46,875 INFO L225 Difference]: With dead ends: 6767 [2021-05-22 02:26:46,876 INFO L226 Difference]: Without dead ends: 6542 [2021-05-22 02:26:46,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 746.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:26:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6542 states. [2021-05-22 02:26:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6542 to 6080. [2021-05-22 02:26:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 6079 states have (on average 3.5038657673959532) internal successors, (21300), 6079 states have internal predecessors, (21300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 21300 transitions. [2021-05-22 02:26:46,958 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 21300 transitions. Word has length 47 [2021-05-22 02:26:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:46,958 INFO L482 AbstractCegarLoop]: Abstraction has 6080 states and 21300 transitions. [2021-05-22 02:26:46,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 21300 transitions. [2021-05-22 02:26:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:46,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:46,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:46,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-22 02:26:46,966 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash -386634088, now seen corresponding path program 76 times [2021-05-22 02:26:46,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:46,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697103795] [2021-05-22 02:26:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:47,183 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 02:26:47,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:47,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697103795] [2021-05-22 02:26:47,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697103795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:47,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:47,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:26:47,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605069591] [2021-05-22 02:26:47,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:47,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:47,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:47,185 INFO L87 Difference]: Start difference. First operand 6080 states and 21300 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:50,093 INFO L93 Difference]: Finished difference Result 9849 states and 34418 transitions. [2021-05-22 02:26:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:26:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:50,110 INFO L225 Difference]: With dead ends: 9849 [2021-05-22 02:26:50,110 INFO L226 Difference]: Without dead ends: 9712 [2021-05-22 02:26:50,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 1624.4ms TimeCoverageRelationStatistics Valid=467, Invalid=5083, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:26:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9712 states. [2021-05-22 02:26:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9712 to 6118. [2021-05-22 02:26:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6118 states, 6117 states have (on average 3.5002452182442374) internal successors, (21411), 6117 states have internal predecessors, (21411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6118 states to 6118 states and 21411 transitions. [2021-05-22 02:26:50,216 INFO L78 Accepts]: Start accepts. Automaton has 6118 states and 21411 transitions. Word has length 47 [2021-05-22 02:26:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:50,216 INFO L482 AbstractCegarLoop]: Abstraction has 6118 states and 21411 transitions. [2021-05-22 02:26:50,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6118 states and 21411 transitions. [2021-05-22 02:26:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:50,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:50,224 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:50,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-22 02:26:50,225 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash -400165510, now seen corresponding path program 77 times [2021-05-22 02:26:50,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:50,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283577665] [2021-05-22 02:26:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:50,448 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 02:26:50,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:50,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283577665] [2021-05-22 02:26:50,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283577665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:50,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:50,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:50,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812420517] [2021-05-22 02:26:50,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:50,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:50,449 INFO L87 Difference]: Start difference. First operand 6118 states and 21411 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:53,748 INFO L93 Difference]: Finished difference Result 10931 states and 38497 transitions. [2021-05-22 02:26:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-22 02:26:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:53,767 INFO L225 Difference]: With dead ends: 10931 [2021-05-22 02:26:53,767 INFO L226 Difference]: Without dead ends: 10842 [2021-05-22 02:26:53,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1941.1ms TimeCoverageRelationStatistics Valid=594, Invalid=6048, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:26:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2021-05-22 02:26:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6122. [2021-05-22 02:26:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 6121 states have (on average 3.499264826008822) internal successors, (21419), 6121 states have internal predecessors, (21419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 21419 transitions. [2021-05-22 02:26:53,880 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 21419 transitions. Word has length 47 [2021-05-22 02:26:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:53,881 INFO L482 AbstractCegarLoop]: Abstraction has 6122 states and 21419 transitions. [2021-05-22 02:26:53,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 21419 transitions. [2021-05-22 02:26:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:53,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:53,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:53,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-22 02:26:53,889 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1250817418, now seen corresponding path program 78 times [2021-05-22 02:26:53,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:53,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615432819] [2021-05-22 02:26:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:54,129 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 02:26:54,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:54,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615432819] [2021-05-22 02:26:54,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615432819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:54,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:54,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:54,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496648551] [2021-05-22 02:26:54,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:54,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:54,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:54,130 INFO L87 Difference]: Start difference. First operand 6122 states and 21419 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:57,284 INFO L93 Difference]: Finished difference Result 11010 states and 38913 transitions. [2021-05-22 02:26:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:26:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:57,303 INFO L225 Difference]: With dead ends: 11010 [2021-05-22 02:26:57,303 INFO L226 Difference]: Without dead ends: 10903 [2021-05-22 02:26:57,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1828.1ms TimeCoverageRelationStatistics Valid=553, Invalid=5767, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:26:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10903 states. [2021-05-22 02:26:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10903 to 6084. [2021-05-22 02:26:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6084 states, 6083 states have (on average 3.5025480848265658) internal successors, (21306), 6083 states have internal predecessors, (21306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 21306 transitions. [2021-05-22 02:26:57,415 INFO L78 Accepts]: Start accepts. Automaton has 6084 states and 21306 transitions. Word has length 47 [2021-05-22 02:26:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:57,415 INFO L482 AbstractCegarLoop]: Abstraction has 6084 states and 21306 transitions. [2021-05-22 02:26:57,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6084 states and 21306 transitions. [2021-05-22 02:26:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:57,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:57,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:57,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-22 02:26:57,425 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1350183558, now seen corresponding path program 79 times [2021-05-22 02:26:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:57,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879715728] [2021-05-22 02:26:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:57,660 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 02:26:57,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879715728] [2021-05-22 02:26:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879715728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972935942] [2021-05-22 02:26:57,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:57,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:57,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:57,661 INFO L87 Difference]: Start difference. First operand 6084 states and 21306 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:58,868 INFO L93 Difference]: Finished difference Result 7050 states and 24382 transitions. [2021-05-22 02:26:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:26:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:26:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:58,881 INFO L225 Difference]: With dead ends: 7050 [2021-05-22 02:26:58,881 INFO L226 Difference]: Without dead ends: 6961 [2021-05-22 02:26:58,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 832.6ms TimeCoverageRelationStatistics Valid=219, Invalid=2133, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:26:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-05-22 02:26:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 6094. [2021-05-22 02:26:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6094 states, 6093 states have (on average 3.501230920728705) internal successors, (21333), 6093 states have internal predecessors, (21333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6094 states to 6094 states and 21333 transitions. [2021-05-22 02:26:58,970 INFO L78 Accepts]: Start accepts. Automaton has 6094 states and 21333 transitions. Word has length 47 [2021-05-22 02:26:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:58,970 INFO L482 AbstractCegarLoop]: Abstraction has 6094 states and 21333 transitions. [2021-05-22 02:26:58,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6094 states and 21333 transitions. [2021-05-22 02:26:58,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:26:58,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:58,977 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:58,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-22 02:26:58,977 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1673845382, now seen corresponding path program 80 times [2021-05-22 02:26:58,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:58,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16009163] [2021-05-22 02:26:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:59,216 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 02:26:59,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:59,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16009163] [2021-05-22 02:26:59,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16009163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:59,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:59,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:26:59,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159620170] [2021-05-22 02:26:59,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:59,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:59,218 INFO L87 Difference]: Start difference. First operand 6094 states and 21333 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:00,568 INFO L93 Difference]: Finished difference Result 6983 states and 24195 transitions. [2021-05-22 02:27:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:27:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:00,579 INFO L225 Difference]: With dead ends: 6983 [2021-05-22 02:27:00,580 INFO L226 Difference]: Without dead ends: 6862 [2021-05-22 02:27:00,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=237, Invalid=2415, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:27:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2021-05-22 02:27:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 6090. [2021-05-22 02:27:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6090 states, 6089 states have (on average 3.5012317293480044) internal successors, (21319), 6089 states have internal predecessors, (21319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6090 states to 6090 states and 21319 transitions. [2021-05-22 02:27:00,676 INFO L78 Accepts]: Start accepts. Automaton has 6090 states and 21319 transitions. Word has length 47 [2021-05-22 02:27:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:00,676 INFO L482 AbstractCegarLoop]: Abstraction has 6090 states and 21319 transitions. [2021-05-22 02:27:00,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6090 states and 21319 transitions. [2021-05-22 02:27:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:00,684 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:00,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:00,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-22 02:27:00,684 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash 221237878, now seen corresponding path program 81 times [2021-05-22 02:27:00,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:00,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339073124] [2021-05-22 02:27:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:00,924 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 02:27:00,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:00,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339073124] [2021-05-22 02:27:00,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339073124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:00,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:00,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:00,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055319153] [2021-05-22 02:27:00,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:00,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:00,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:00,925 INFO L87 Difference]: Start difference. First operand 6090 states and 21319 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:02,504 INFO L93 Difference]: Finished difference Result 7659 states and 26554 transitions. [2021-05-22 02:27:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:27:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:02,517 INFO L225 Difference]: With dead ends: 7659 [2021-05-22 02:27:02,517 INFO L226 Difference]: Without dead ends: 7544 [2021-05-22 02:27:02,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 941.4ms TimeCoverageRelationStatistics Valid=243, Invalid=2513, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:27:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7544 states. [2021-05-22 02:27:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7544 to 6202. [2021-05-22 02:27:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6202 states, 6201 states have (on average 3.4960490243509112) internal successors, (21679), 6201 states have internal predecessors, (21679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6202 states to 6202 states and 21679 transitions. [2021-05-22 02:27:02,613 INFO L78 Accepts]: Start accepts. Automaton has 6202 states and 21679 transitions. Word has length 47 [2021-05-22 02:27:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:02,613 INFO L482 AbstractCegarLoop]: Abstraction has 6202 states and 21679 transitions. [2021-05-22 02:27:02,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6202 states and 21679 transitions. [2021-05-22 02:27:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:02,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:02,622 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:02,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-22 02:27:02,622 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash 520129556, now seen corresponding path program 82 times [2021-05-22 02:27:02,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16358870] [2021-05-22 02:27:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:02,859 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 02:27:02,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:02,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16358870] [2021-05-22 02:27:02,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16358870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:02,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:02,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:02,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596450932] [2021-05-22 02:27:02,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:02,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:02,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:02,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:02,860 INFO L87 Difference]: Start difference. First operand 6202 states and 21679 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:04,131 INFO L93 Difference]: Finished difference Result 7055 states and 24409 transitions. [2021-05-22 02:27:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:27:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:04,143 INFO L225 Difference]: With dead ends: 7055 [2021-05-22 02:27:04,143 INFO L226 Difference]: Without dead ends: 6958 [2021-05-22 02:27:04,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 844.1ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:27:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2021-05-22 02:27:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6216. [2021-05-22 02:27:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 6215 states have (on average 3.4925181013676587) internal successors, (21706), 6215 states have internal predecessors, (21706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 21706 transitions. [2021-05-22 02:27:04,236 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 21706 transitions. Word has length 47 [2021-05-22 02:27:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:04,236 INFO L482 AbstractCegarLoop]: Abstraction has 6216 states and 21706 transitions. [2021-05-22 02:27:04,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 21706 transitions. [2021-05-22 02:27:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:04,244 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:04,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:04,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-22 02:27:04,244 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1205290954, now seen corresponding path program 83 times [2021-05-22 02:27:04,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:04,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054046794] [2021-05-22 02:27:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:04,471 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 02:27:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054046794] [2021-05-22 02:27:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054046794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:04,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:04,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:04,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198195131] [2021-05-22 02:27:04,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:04,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:04,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:04,472 INFO L87 Difference]: Start difference. First operand 6216 states and 21706 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:05,598 INFO L93 Difference]: Finished difference Result 7031 states and 24319 transitions. [2021-05-22 02:27:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:27:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:05,610 INFO L225 Difference]: With dead ends: 7031 [2021-05-22 02:27:05,611 INFO L226 Difference]: Without dead ends: 6926 [2021-05-22 02:27:05,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:27:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-05-22 02:27:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 6202. [2021-05-22 02:27:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6202 states, 6201 states have (on average 3.4950814384776647) internal successors, (21673), 6201 states have internal predecessors, (21673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6202 states to 6202 states and 21673 transitions. [2021-05-22 02:27:05,697 INFO L78 Accepts]: Start accepts. Automaton has 6202 states and 21673 transitions. Word has length 47 [2021-05-22 02:27:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:05,697 INFO L482 AbstractCegarLoop]: Abstraction has 6202 states and 21673 transitions. [2021-05-22 02:27:05,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 6202 states and 21673 transitions. [2021-05-22 02:27:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:05,704 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:05,704 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:05,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-22 02:27:05,705 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1114276790, now seen corresponding path program 84 times [2021-05-22 02:27:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:05,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014479517] [2021-05-22 02:27:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:05,934 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 02:27:05,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:05,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014479517] [2021-05-22 02:27:05,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014479517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:05,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:05,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:05,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092313166] [2021-05-22 02:27:05,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:05,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:05,935 INFO L87 Difference]: Start difference. First operand 6202 states and 21673 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:07,171 INFO L93 Difference]: Finished difference Result 6942 states and 24123 transitions. [2021-05-22 02:27:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:27:07,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:07,183 INFO L225 Difference]: With dead ends: 6942 [2021-05-22 02:27:07,183 INFO L226 Difference]: Without dead ends: 6853 [2021-05-22 02:27:07,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=232, Invalid=2218, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:27:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6853 states. [2021-05-22 02:27:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6853 to 6222. [2021-05-22 02:27:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 3.4950972512457805) internal successors, (21743), 6221 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 21743 transitions. [2021-05-22 02:27:07,271 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 21743 transitions. Word has length 47 [2021-05-22 02:27:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:07,272 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 21743 transitions. [2021-05-22 02:27:07,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 21743 transitions. [2021-05-22 02:27:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:07,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:07,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:07,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-22 02:27:07,280 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:07,280 INFO L82 PathProgramCache]: Analyzing trace with hash 790614966, now seen corresponding path program 85 times [2021-05-22 02:27:07,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:07,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286271440] [2021-05-22 02:27:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:07,511 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 02:27:07,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:07,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286271440] [2021-05-22 02:27:07,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286271440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:07,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:07,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:07,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049694725] [2021-05-22 02:27:07,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:07,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:07,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:07,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:07,512 INFO L87 Difference]: Start difference. First operand 6222 states and 21743 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:08,781 INFO L93 Difference]: Finished difference Result 6970 states and 24211 transitions. [2021-05-22 02:27:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:27:08,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:08,792 INFO L225 Difference]: With dead ends: 6970 [2021-05-22 02:27:08,792 INFO L226 Difference]: Without dead ends: 6841 [2021-05-22 02:27:08,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 871.1ms TimeCoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:27:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-05-22 02:27:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 6224. [2021-05-22 02:27:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.4934918849429537) internal successors, (21740), 6223 states have internal predecessors, (21740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21740 transitions. [2021-05-22 02:27:08,878 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21740 transitions. Word has length 47 [2021-05-22 02:27:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:08,878 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21740 transitions. [2021-05-22 02:27:08,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21740 transitions. [2021-05-22 02:27:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:08,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:08,886 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:08,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-22 02:27:08,887 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 846726420, now seen corresponding path program 86 times [2021-05-22 02:27:08,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:08,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864265983] [2021-05-22 02:27:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:09,124 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 02:27:09,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:09,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864265983] [2021-05-22 02:27:09,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864265983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:09,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:09,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:09,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323078175] [2021-05-22 02:27:09,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:09,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:09,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:09,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:09,125 INFO L87 Difference]: Start difference. First operand 6224 states and 21740 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:10,399 INFO L93 Difference]: Finished difference Result 6907 states and 24038 transitions. [2021-05-22 02:27:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:27:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:10,410 INFO L225 Difference]: With dead ends: 6907 [2021-05-22 02:27:10,410 INFO L226 Difference]: Without dead ends: 6746 [2021-05-22 02:27:10,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=231, Invalid=2219, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:27:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6746 states. [2021-05-22 02:27:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6746 to 6208. [2021-05-22 02:27:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6208 states, 6207 states have (on average 3.4941195424520703) internal successors, (21688), 6207 states have internal predecessors, (21688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6208 states to 6208 states and 21688 transitions. [2021-05-22 02:27:10,503 INFO L78 Accepts]: Start accepts. Automaton has 6208 states and 21688 transitions. Word has length 47 [2021-05-22 02:27:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:10,503 INFO L482 AbstractCegarLoop]: Abstraction has 6208 states and 21688 transitions. [2021-05-22 02:27:10,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 6208 states and 21688 transitions. [2021-05-22 02:27:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:10,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:10,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:10,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-22 02:27:10,512 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:10,512 INFO L82 PathProgramCache]: Analyzing trace with hash -951643210, now seen corresponding path program 87 times [2021-05-22 02:27:10,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:10,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586140353] [2021-05-22 02:27:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:10,743 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 02:27:10,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586140353] [2021-05-22 02:27:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586140353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:10,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:10,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:10,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041240309] [2021-05-22 02:27:10,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:10,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:10,744 INFO L87 Difference]: Start difference. First operand 6208 states and 21688 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:12,660 INFO L93 Difference]: Finished difference Result 8257 states and 28674 transitions. [2021-05-22 02:27:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:27:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:12,674 INFO L225 Difference]: With dead ends: 8257 [2021-05-22 02:27:12,674 INFO L226 Difference]: Without dead ends: 8060 [2021-05-22 02:27:12,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1133.1ms TimeCoverageRelationStatistics Valid=321, Invalid=3461, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:27:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-05-22 02:27:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 6144. [2021-05-22 02:27:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6144 states, 6143 states have (on average 3.49894188507244) internal successors, (21494), 6143 states have internal predecessors, (21494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6144 states to 6144 states and 21494 transitions. [2021-05-22 02:27:12,773 INFO L78 Accepts]: Start accepts. Automaton has 6144 states and 21494 transitions. Word has length 47 [2021-05-22 02:27:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:12,773 INFO L482 AbstractCegarLoop]: Abstraction has 6144 states and 21494 transitions. [2021-05-22 02:27:12,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 6144 states and 21494 transitions. [2021-05-22 02:27:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:12,781 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:12,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:12,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-22 02:27:12,781 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1726760812, now seen corresponding path program 88 times [2021-05-22 02:27:12,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:12,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931501979] [2021-05-22 02:27:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:13,063 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 02:27:13,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:13,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931501979] [2021-05-22 02:27:13,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931501979] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:13,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:13,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:13,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878810378] [2021-05-22 02:27:13,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:13,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:13,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:13,065 INFO L87 Difference]: Start difference. First operand 6144 states and 21494 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:14,942 INFO L93 Difference]: Finished difference Result 8151 states and 28335 transitions. [2021-05-22 02:27:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:27:14,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:14,956 INFO L225 Difference]: With dead ends: 8151 [2021-05-22 02:27:14,957 INFO L226 Difference]: Without dead ends: 8056 [2021-05-22 02:27:14,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1144.0ms TimeCoverageRelationStatistics Valid=313, Invalid=3347, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:27:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8056 states. [2021-05-22 02:27:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8056 to 6132. [2021-05-22 02:27:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 3.500897080411026) internal successors, (21464), 6131 states have internal predecessors, (21464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 21464 transitions. [2021-05-22 02:27:15,060 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 21464 transitions. Word has length 47 [2021-05-22 02:27:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:15,061 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 21464 transitions. [2021-05-22 02:27:15,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 21464 transitions. [2021-05-22 02:27:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:15,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:15,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:15,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-22 02:27:15,069 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1427869134, now seen corresponding path program 89 times [2021-05-22 02:27:15,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:15,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141256149] [2021-05-22 02:27:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:15,296 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 02:27:15,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:15,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141256149] [2021-05-22 02:27:15,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141256149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:15,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:15,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:15,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15459132] [2021-05-22 02:27:15,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:15,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:15,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:15,297 INFO L87 Difference]: Start difference. First operand 6132 states and 21464 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:16,526 INFO L93 Difference]: Finished difference Result 7016 states and 24295 transitions. [2021-05-22 02:27:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:27:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:16,538 INFO L225 Difference]: With dead ends: 7016 [2021-05-22 02:27:16,538 INFO L226 Difference]: Without dead ends: 6919 [2021-05-22 02:27:16,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 803.6ms TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:27:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6919 states. [2021-05-22 02:27:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6919 to 6144. [2021-05-22 02:27:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6144 states, 6143 states have (on average 3.4986163112485755) internal successors, (21492), 6143 states have internal predecessors, (21492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6144 states to 6144 states and 21492 transitions. [2021-05-22 02:27:16,631 INFO L78 Accepts]: Start accepts. Automaton has 6144 states and 21492 transitions. Word has length 47 [2021-05-22 02:27:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:16,631 INFO L482 AbstractCegarLoop]: Abstraction has 6144 states and 21492 transitions. [2021-05-22 02:27:16,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 6144 states and 21492 transitions. [2021-05-22 02:27:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:16,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:16,639 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:16,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-22 02:27:16,640 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1141677652, now seen corresponding path program 90 times [2021-05-22 02:27:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:16,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927426645] [2021-05-22 02:27:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:16,867 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 02:27:16,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:16,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927426645] [2021-05-22 02:27:16,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927426645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:16,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:16,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:16,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458149324] [2021-05-22 02:27:16,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:16,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:16,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:16,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:16,868 INFO L87 Difference]: Start difference. First operand 6144 states and 21492 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:18,003 INFO L93 Difference]: Finished difference Result 6992 states and 24205 transitions. [2021-05-22 02:27:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:27:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:18,015 INFO L225 Difference]: With dead ends: 6992 [2021-05-22 02:27:18,015 INFO L226 Difference]: Without dead ends: 6893 [2021-05-22 02:27:18,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 757.0ms TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:27:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6893 states. [2021-05-22 02:27:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6893 to 6136. [2021-05-22 02:27:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 3.4999185004074977) internal successors, (21472), 6135 states have internal predecessors, (21472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 21472 transitions. [2021-05-22 02:27:18,110 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 21472 transitions. Word has length 47 [2021-05-22 02:27:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:18,110 INFO L482 AbstractCegarLoop]: Abstraction has 6136 states and 21472 transitions. [2021-05-22 02:27:18,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 21472 transitions. [2021-05-22 02:27:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:18,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:18,119 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:18,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-22 02:27:18,119 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2077545080, now seen corresponding path program 91 times [2021-05-22 02:27:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:18,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903845677] [2021-05-22 02:27:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:18,352 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 02:27:18,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903845677] [2021-05-22 02:27:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903845677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:18,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:18,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:18,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24860102] [2021-05-22 02:27:18,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:18,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:18,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:18,353 INFO L87 Difference]: Start difference. First operand 6136 states and 21472 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:19,588 INFO L93 Difference]: Finished difference Result 6771 states and 23602 transitions. [2021-05-22 02:27:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:27:19,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:19,600 INFO L225 Difference]: With dead ends: 6771 [2021-05-22 02:27:19,600 INFO L226 Difference]: Without dead ends: 6626 [2021-05-22 02:27:19,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 804.6ms TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:27:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-05-22 02:27:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 6148. [2021-05-22 02:27:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 3.497966487717586) internal successors, (21502), 6147 states have internal predecessors, (21502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 21502 transitions. [2021-05-22 02:27:19,726 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 21502 transitions. Word has length 47 [2021-05-22 02:27:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:19,726 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 21502 transitions. [2021-05-22 02:27:19,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 21502 transitions. [2021-05-22 02:27:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:19,734 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:19,735 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:19,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-22 02:27:19,735 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:19,735 INFO L82 PathProgramCache]: Analyzing trace with hash 273969510, now seen corresponding path program 92 times [2021-05-22 02:27:19,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:19,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985220150] [2021-05-22 02:27:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:19,963 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 02:27:19,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:19,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985220150] [2021-05-22 02:27:19,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985220150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:19,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:19,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:19,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300392251] [2021-05-22 02:27:19,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:19,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:19,964 INFO L87 Difference]: Start difference. First operand 6148 states and 21502 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:21,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:21,091 INFO L93 Difference]: Finished difference Result 6867 states and 23829 transitions. [2021-05-22 02:27:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:27:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:21,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:21,102 INFO L225 Difference]: With dead ends: 6867 [2021-05-22 02:27:21,102 INFO L226 Difference]: Without dead ends: 6770 [2021-05-22 02:27:21,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:27:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2021-05-22 02:27:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6154. [2021-05-22 02:27:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 6153 states have (on average 3.49699333658378) internal successors, (21517), 6153 states have internal predecessors, (21517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 21517 transitions. [2021-05-22 02:27:21,189 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 21517 transitions. Word has length 47 [2021-05-22 02:27:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:21,190 INFO L482 AbstractCegarLoop]: Abstraction has 6154 states and 21517 transitions. [2021-05-22 02:27:21,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 21517 transitions. [2021-05-22 02:27:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:21,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:21,198 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:21,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-22 02:27:21,198 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:21,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1451451000, now seen corresponding path program 93 times [2021-05-22 02:27:21,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:21,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757441208] [2021-05-22 02:27:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:21,433 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 02:27:21,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:21,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757441208] [2021-05-22 02:27:21,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757441208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:21,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:21,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:21,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842559493] [2021-05-22 02:27:21,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:21,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:21,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:21,434 INFO L87 Difference]: Start difference. First operand 6154 states and 21517 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:22,523 INFO L93 Difference]: Finished difference Result 6768 states and 23524 transitions. [2021-05-22 02:27:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:27:22,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:22,535 INFO L225 Difference]: With dead ends: 6768 [2021-05-22 02:27:22,535 INFO L226 Difference]: Without dead ends: 6639 [2021-05-22 02:27:22,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 723.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:27:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2021-05-22 02:27:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6116. [2021-05-22 02:27:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 3.504170073589534) internal successors, (21428), 6115 states have internal predecessors, (21428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 21428 transitions. [2021-05-22 02:27:22,627 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 21428 transitions. Word has length 47 [2021-05-22 02:27:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:22,627 INFO L482 AbstractCegarLoop]: Abstraction has 6116 states and 21428 transitions. [2021-05-22 02:27:22,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 21428 transitions. [2021-05-22 02:27:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:22,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:22,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:22,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-22 02:27:22,635 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 380026104, now seen corresponding path program 94 times [2021-05-22 02:27:22,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:22,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002375367] [2021-05-22 02:27:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:22,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:22,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002375367] [2021-05-22 02:27:22,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002375367] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:22,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:22,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:27:22,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775871122] [2021-05-22 02:27:22,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:27:22,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:22,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:27:22,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:27:22,882 INFO L87 Difference]: Start difference. First operand 6116 states and 21428 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:23,794 INFO L93 Difference]: Finished difference Result 6669 states and 23239 transitions. [2021-05-22 02:27:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:27:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:23,806 INFO L225 Difference]: With dead ends: 6669 [2021-05-22 02:27:23,807 INFO L226 Difference]: Without dead ends: 6532 [2021-05-22 02:27:23,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:27:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2021-05-22 02:27:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6132. [2021-05-22 02:27:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 3.5028543467623554) internal successors, (21476), 6131 states have internal predecessors, (21476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 21476 transitions. [2021-05-22 02:27:23,900 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 21476 transitions. Word has length 47 [2021-05-22 02:27:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:23,900 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 21476 transitions. [2021-05-22 02:27:23,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 21476 transitions. [2021-05-22 02:27:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:23,908 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:23,908 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:23,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-22 02:27:23,908 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1897722326, now seen corresponding path program 95 times [2021-05-22 02:27:23,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:23,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068997887] [2021-05-22 02:27:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:24,123 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 02:27:24,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:24,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068997887] [2021-05-22 02:27:24,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068997887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:24,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:24,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:24,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873907460] [2021-05-22 02:27:24,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:24,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:24,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:24,124 INFO L87 Difference]: Start difference. First operand 6132 states and 21476 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:25,134 INFO L93 Difference]: Finished difference Result 6728 states and 23398 transitions. [2021-05-22 02:27:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:27:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:25,146 INFO L225 Difference]: With dead ends: 6728 [2021-05-22 02:27:25,146 INFO L226 Difference]: Without dead ends: 6639 [2021-05-22 02:27:25,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:27:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2021-05-22 02:27:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6196. [2021-05-22 02:27:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.5015334947538337) internal successors, (21692), 6195 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21692 transitions. [2021-05-22 02:27:25,241 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21692 transitions. Word has length 47 [2021-05-22 02:27:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:25,241 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21692 transitions. [2021-05-22 02:27:25,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21692 transitions. [2021-05-22 02:27:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:25,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:25,250 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:25,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-22 02:27:25,250 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:25,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1963215624, now seen corresponding path program 96 times [2021-05-22 02:27:25,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:25,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022303604] [2021-05-22 02:27:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:25,457 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 02:27:25,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:25,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022303604] [2021-05-22 02:27:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022303604] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:25,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:25,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152772692] [2021-05-22 02:27:25,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:25,458 INFO L87 Difference]: Start difference. First operand 6196 states and 21692 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:26,442 INFO L93 Difference]: Finished difference Result 6637 states and 23127 transitions. [2021-05-22 02:27:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:27:26,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:26,454 INFO L225 Difference]: With dead ends: 6637 [2021-05-22 02:27:26,454 INFO L226 Difference]: Without dead ends: 6508 [2021-05-22 02:27:26,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:27:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6508 states. [2021-05-22 02:27:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6508 to 6196. [2021-05-22 02:27:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.4976594027441483) internal successors, (21668), 6195 states have internal predecessors, (21668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21668 transitions. [2021-05-22 02:27:26,547 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21668 transitions. Word has length 47 [2021-05-22 02:27:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:26,547 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21668 transitions. [2021-05-22 02:27:26,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21668 transitions. [2021-05-22 02:27:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:26,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:26,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:26,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-22 02:27:26,556 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash -401782138, now seen corresponding path program 97 times [2021-05-22 02:27:26,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:26,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482387891] [2021-05-22 02:27:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:26,761 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 02:27:26,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:26,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482387891] [2021-05-22 02:27:26,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482387891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:26,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:26,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:26,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310161767] [2021-05-22 02:27:26,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:26,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:26,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:26,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:26,762 INFO L87 Difference]: Start difference. First operand 6196 states and 21668 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:27,752 INFO L93 Difference]: Finished difference Result 6680 states and 23238 transitions. [2021-05-22 02:27:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:27:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:27,763 INFO L225 Difference]: With dead ends: 6680 [2021-05-22 02:27:27,763 INFO L226 Difference]: Without dead ends: 6591 [2021-05-22 02:27:27,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:27:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6591 states. [2021-05-22 02:27:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6591 to 6196. [2021-05-22 02:27:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.4976594027441483) internal successors, (21668), 6195 states have internal predecessors, (21668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21668 transitions. [2021-05-22 02:27:27,855 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21668 transitions. Word has length 47 [2021-05-22 02:27:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:27,855 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21668 transitions. [2021-05-22 02:27:27,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21668 transitions. [2021-05-22 02:27:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:27,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:27,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:27,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-22 02:27:27,863 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 32247208, now seen corresponding path program 98 times [2021-05-22 02:27:27,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:27,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748798876] [2021-05-22 02:27:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:28,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:28,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748798876] [2021-05-22 02:27:28,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748798876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:28,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:28,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250347645] [2021-05-22 02:27:28,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:28,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:28,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:28,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:28,070 INFO L87 Difference]: Start difference. First operand 6196 states and 21668 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:29,019 INFO L93 Difference]: Finished difference Result 6688 states and 23266 transitions. [2021-05-22 02:27:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:27:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:29,030 INFO L225 Difference]: With dead ends: 6688 [2021-05-22 02:27:29,031 INFO L226 Difference]: Without dead ends: 6583 [2021-05-22 02:27:29,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 635.1ms TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:27:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-05-22 02:27:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6212. [2021-05-22 02:27:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6212 states, 6211 states have (on average 3.4963773949444534) internal successors, (21716), 6211 states have internal predecessors, (21716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6212 states to 6212 states and 21716 transitions. [2021-05-22 02:27:29,154 INFO L78 Accepts]: Start accepts. Automaton has 6212 states and 21716 transitions. Word has length 47 [2021-05-22 02:27:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:29,154 INFO L482 AbstractCegarLoop]: Abstraction has 6212 states and 21716 transitions. [2021-05-22 02:27:29,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6212 states and 21716 transitions. [2021-05-22 02:27:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:29,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:29,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:29,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-22 02:27:29,163 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1305180916, now seen corresponding path program 99 times [2021-05-22 02:27:29,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:29,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144555992] [2021-05-22 02:27:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:29,366 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 02:27:29,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:29,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144555992] [2021-05-22 02:27:29,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144555992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:29,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:29,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:29,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049508119] [2021-05-22 02:27:29,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:29,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:29,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:29,368 INFO L87 Difference]: Start difference. First operand 6212 states and 21716 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:30,340 INFO L93 Difference]: Finished difference Result 6605 states and 23015 transitions. [2021-05-22 02:27:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:27:30,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:30,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:30,350 INFO L225 Difference]: With dead ends: 6605 [2021-05-22 02:27:30,350 INFO L226 Difference]: Without dead ends: 6352 [2021-05-22 02:27:30,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:27:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6352 states. [2021-05-22 02:27:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6352 to 6104. [2021-05-22 02:27:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 6103 states have (on average 3.5058168114042276) internal successors, (21396), 6103 states have internal predecessors, (21396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 21396 transitions. [2021-05-22 02:27:30,430 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 21396 transitions. Word has length 47 [2021-05-22 02:27:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:30,431 INFO L482 AbstractCegarLoop]: Abstraction has 6104 states and 21396 transitions. [2021-05-22 02:27:30,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 21396 transitions. [2021-05-22 02:27:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:30,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:30,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:30,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-22 02:27:30,438 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash 851399496, now seen corresponding path program 100 times [2021-05-22 02:27:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:30,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926812587] [2021-05-22 02:27:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:30,641 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 02:27:30,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:30,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926812587] [2021-05-22 02:27:30,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926812587] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:30,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:30,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:27:30,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720694368] [2021-05-22 02:27:30,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:27:30,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:30,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:27:30,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:27:30,642 INFO L87 Difference]: Start difference. First operand 6104 states and 21396 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:31,471 INFO L93 Difference]: Finished difference Result 6681 states and 23265 transitions. [2021-05-22 02:27:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:27:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:31,483 INFO L225 Difference]: With dead ends: 6681 [2021-05-22 02:27:31,483 INFO L226 Difference]: Without dead ends: 6544 [2021-05-22 02:27:31,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:27:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6544 states. [2021-05-22 02:27:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6544 to 6160. [2021-05-22 02:27:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.5012177301509984) internal successors, (21564), 6159 states have internal predecessors, (21564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21564 transitions. [2021-05-22 02:27:31,572 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21564 transitions. Word has length 47 [2021-05-22 02:27:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:31,572 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21564 transitions. [2021-05-22 02:27:31,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21564 transitions. [2021-05-22 02:27:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:31,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:31,581 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:31,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-22 02:27:31,581 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1568967496, now seen corresponding path program 101 times [2021-05-22 02:27:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:31,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420290095] [2021-05-22 02:27:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:31,786 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 02:27:31,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:31,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420290095] [2021-05-22 02:27:31,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420290095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:31,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:31,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:31,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082207921] [2021-05-22 02:27:31,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:31,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:31,787 INFO L87 Difference]: Start difference. First operand 6160 states and 21564 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:32,738 INFO L93 Difference]: Finished difference Result 6740 states and 23424 transitions. [2021-05-22 02:27:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:27:32,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:32,749 INFO L225 Difference]: With dead ends: 6740 [2021-05-22 02:27:32,749 INFO L226 Difference]: Without dead ends: 6651 [2021-05-22 02:27:32,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:27:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-05-22 02:27:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 6224. [2021-05-22 02:27:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.4999196529005303) internal successors, (21780), 6223 states have internal predecessors, (21780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21780 transitions. [2021-05-22 02:27:32,833 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21780 transitions. Word has length 47 [2021-05-22 02:27:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:32,833 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21780 transitions. [2021-05-22 02:27:32,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21780 transitions. [2021-05-22 02:27:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:32,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:32,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:32,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-22 02:27:32,841 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash -115495190, now seen corresponding path program 102 times [2021-05-22 02:27:32,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:32,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980453619] [2021-05-22 02:27:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:33,046 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 02:27:33,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:33,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980453619] [2021-05-22 02:27:33,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980453619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:33,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:33,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:33,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507513331] [2021-05-22 02:27:33,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:33,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:33,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:33,047 INFO L87 Difference]: Start difference. First operand 6224 states and 21780 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:33,962 INFO L93 Difference]: Finished difference Result 6649 states and 23153 transitions. [2021-05-22 02:27:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:27:33,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:33,973 INFO L225 Difference]: With dead ends: 6649 [2021-05-22 02:27:33,973 INFO L226 Difference]: Without dead ends: 6520 [2021-05-22 02:27:33,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:27:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2021-05-22 02:27:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6224. [2021-05-22 02:27:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.4960629921259843) internal successors, (21756), 6223 states have internal predecessors, (21756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21756 transitions. [2021-05-22 02:27:34,067 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21756 transitions. Word has length 47 [2021-05-22 02:27:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:34,067 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21756 transitions. [2021-05-22 02:27:34,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21756 transitions. [2021-05-22 02:27:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:34,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:34,076 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:34,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-22 02:27:34,076 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1928645226, now seen corresponding path program 103 times [2021-05-22 02:27:34,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:34,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494157635] [2021-05-22 02:27:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:34,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:34,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494157635] [2021-05-22 02:27:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494157635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:34,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:34,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994079507] [2021-05-22 02:27:34,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:34,286 INFO L87 Difference]: Start difference. First operand 6224 states and 21756 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:35,232 INFO L93 Difference]: Finished difference Result 6692 states and 23264 transitions. [2021-05-22 02:27:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:27:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:35,243 INFO L225 Difference]: With dead ends: 6692 [2021-05-22 02:27:35,243 INFO L226 Difference]: Without dead ends: 6603 [2021-05-22 02:27:35,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:27:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-05-22 02:27:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6224. [2021-05-22 02:27:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.4960629921259843) internal successors, (21756), 6223 states have internal predecessors, (21756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21756 transitions. [2021-05-22 02:27:35,362 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21756 transitions. Word has length 47 [2021-05-22 02:27:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:35,362 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21756 transitions. [2021-05-22 02:27:35,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21756 transitions. [2021-05-22 02:27:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:35,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:35,370 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:35,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-22 02:27:35,370 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash 244182540, now seen corresponding path program 104 times [2021-05-22 02:27:35,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:35,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525373902] [2021-05-22 02:27:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:35,591 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 02:27:35,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:35,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525373902] [2021-05-22 02:27:35,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525373902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:35,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:35,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:35,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156303043] [2021-05-22 02:27:35,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:35,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:35,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:35,592 INFO L87 Difference]: Start difference. First operand 6224 states and 21756 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:36,485 INFO L93 Difference]: Finished difference Result 6700 states and 23292 transitions. [2021-05-22 02:27:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:27:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:36,496 INFO L225 Difference]: With dead ends: 6700 [2021-05-22 02:27:36,496 INFO L226 Difference]: Without dead ends: 6595 [2021-05-22 02:27:36,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:27:36,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6595 states. [2021-05-22 02:27:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6595 to 6240. [2021-05-22 02:27:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6240 states, 6239 states have (on average 3.494790831864081) internal successors, (21804), 6239 states have internal predecessors, (21804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 21804 transitions. [2021-05-22 02:27:36,579 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 21804 transitions. Word has length 47 [2021-05-22 02:27:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:36,579 INFO L482 AbstractCegarLoop]: Abstraction has 6240 states and 21804 transitions. [2021-05-22 02:27:36,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 21804 transitions. [2021-05-22 02:27:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:36,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:36,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:36,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-22 02:27:36,587 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1572879960, now seen corresponding path program 105 times [2021-05-22 02:27:36,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:36,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929259922] [2021-05-22 02:27:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:36,794 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 02:27:36,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929259922] [2021-05-22 02:27:36,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929259922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:36,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:36,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:36,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635965640] [2021-05-22 02:27:36,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:36,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:36,795 INFO L87 Difference]: Start difference. First operand 6240 states and 21804 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:37,664 INFO L93 Difference]: Finished difference Result 6593 states and 22965 transitions. [2021-05-22 02:27:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:27:37,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:37,675 INFO L225 Difference]: With dead ends: 6593 [2021-05-22 02:27:37,676 INFO L226 Difference]: Without dead ends: 6320 [2021-05-22 02:27:37,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:27:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6320 states. [2021-05-22 02:27:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6320 to 6112. [2021-05-22 02:27:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.503845524464081) internal successors, (21412), 6111 states have internal predecessors, (21412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 21412 transitions. [2021-05-22 02:27:37,762 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 21412 transitions. Word has length 47 [2021-05-22 02:27:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:37,762 INFO L482 AbstractCegarLoop]: Abstraction has 6112 states and 21412 transitions. [2021-05-22 02:27:37,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 21412 transitions. [2021-05-22 02:27:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:37,770 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:37,770 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:37,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-22 02:27:37,770 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:37,770 INFO L82 PathProgramCache]: Analyzing trace with hash 3597688, now seen corresponding path program 106 times [2021-05-22 02:27:37,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:37,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291839830] [2021-05-22 02:27:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:37,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:37,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291839830] [2021-05-22 02:27:37,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291839830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:37,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:37,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:27:37,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402983642] [2021-05-22 02:27:37,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:27:37,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:27:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:27:37,972 INFO L87 Difference]: Start difference. First operand 6112 states and 21412 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:38,895 INFO L93 Difference]: Finished difference Result 6837 states and 23807 transitions. [2021-05-22 02:27:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:27:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:38,907 INFO L225 Difference]: With dead ends: 6837 [2021-05-22 02:27:38,907 INFO L226 Difference]: Without dead ends: 6700 [2021-05-22 02:27:38,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:27:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-05-22 02:27:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 6132. [2021-05-22 02:27:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 3.5031805578209103) internal successors, (21478), 6131 states have internal predecessors, (21478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 21478 transitions. [2021-05-22 02:27:39,002 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 21478 transitions. Word has length 47 [2021-05-22 02:27:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:39,002 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 21478 transitions. [2021-05-22 02:27:39,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 21478 transitions. [2021-05-22 02:27:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:39,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:39,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:39,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-22 02:27:39,011 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:39,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1521293910, now seen corresponding path program 107 times [2021-05-22 02:27:39,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:39,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643243967] [2021-05-22 02:27:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:39,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:39,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643243967] [2021-05-22 02:27:39,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643243967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:39,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:39,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784011423] [2021-05-22 02:27:39,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:39,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:39,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:39,251 INFO L87 Difference]: Start difference. First operand 6132 states and 21478 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:40,246 INFO L93 Difference]: Finished difference Result 6896 states and 23966 transitions. [2021-05-22 02:27:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:27:40,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:40,258 INFO L225 Difference]: With dead ends: 6896 [2021-05-22 02:27:40,258 INFO L226 Difference]: Without dead ends: 6807 [2021-05-22 02:27:40,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:27:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-05-22 02:27:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 6196. [2021-05-22 02:27:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.501856335754641) internal successors, (21694), 6195 states have internal predecessors, (21694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21694 transitions. [2021-05-22 02:27:40,350 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21694 transitions. Word has length 47 [2021-05-22 02:27:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:40,350 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21694 transitions. [2021-05-22 02:27:40,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21694 transitions. [2021-05-22 02:27:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:40,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:40,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:40,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-22 02:27:40,358 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1955323256, now seen corresponding path program 108 times [2021-05-22 02:27:40,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:40,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324816892] [2021-05-22 02:27:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:40,565 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 02:27:40,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:40,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324816892] [2021-05-22 02:27:40,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324816892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:40,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:40,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265364122] [2021-05-22 02:27:40,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:40,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:40,566 INFO L87 Difference]: Start difference. First operand 6196 states and 21694 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:41,589 INFO L93 Difference]: Finished difference Result 6805 states and 23695 transitions. [2021-05-22 02:27:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:27:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:41,600 INFO L225 Difference]: With dead ends: 6805 [2021-05-22 02:27:41,600 INFO L226 Difference]: Without dead ends: 6676 [2021-05-22 02:27:41,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 630.8ms TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:27:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-05-22 02:27:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 6196. [2021-05-22 02:27:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.4979822437449557) internal successors, (21670), 6195 states have internal predecessors, (21670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21670 transitions. [2021-05-22 02:27:41,716 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21670 transitions. Word has length 47 [2021-05-22 02:27:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:41,716 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21670 transitions. [2021-05-22 02:27:41,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21670 transitions. [2021-05-22 02:27:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:41,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:41,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:41,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-22 02:27:41,725 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -778210554, now seen corresponding path program 109 times [2021-05-22 02:27:41,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:41,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172595615] [2021-05-22 02:27:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:41,959 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 02:27:41,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:41,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172595615] [2021-05-22 02:27:41,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172595615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:41,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:41,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739702512] [2021-05-22 02:27:41,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:41,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:41,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:41,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:41,961 INFO L87 Difference]: Start difference. First operand 6196 states and 21670 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:43,006 INFO L93 Difference]: Finished difference Result 6944 states and 24142 transitions. [2021-05-22 02:27:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:27:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:43,018 INFO L225 Difference]: With dead ends: 6944 [2021-05-22 02:27:43,018 INFO L226 Difference]: Without dead ends: 6855 [2021-05-22 02:27:43,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 708.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:27:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6855 states. [2021-05-22 02:27:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6855 to 6196. [2021-05-22 02:27:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.4979822437449557) internal successors, (21670), 6195 states have internal predecessors, (21670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21670 transitions. [2021-05-22 02:27:43,111 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21670 transitions. Word has length 47 [2021-05-22 02:27:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:43,111 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21670 transitions. [2021-05-22 02:27:43,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21670 transitions. [2021-05-22 02:27:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:43,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:43,120 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:43,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-22 02:27:43,120 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:43,120 INFO L82 PathProgramCache]: Analyzing trace with hash -344181208, now seen corresponding path program 110 times [2021-05-22 02:27:43,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:43,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154062917] [2021-05-22 02:27:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:43,365 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 02:27:43,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154062917] [2021-05-22 02:27:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154062917] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:43,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:43,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:43,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612929039] [2021-05-22 02:27:43,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:43,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:43,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:43,366 INFO L87 Difference]: Start difference. First operand 6196 states and 21670 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:44,424 INFO L93 Difference]: Finished difference Result 6952 states and 24170 transitions. [2021-05-22 02:27:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:27:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:44,436 INFO L225 Difference]: With dead ends: 6952 [2021-05-22 02:27:44,436 INFO L226 Difference]: Without dead ends: 6847 [2021-05-22 02:27:44,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 700.7ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:27:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-05-22 02:27:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 6212. [2021-05-22 02:27:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6212 states, 6211 states have (on average 3.496699404282724) internal successors, (21718), 6211 states have internal predecessors, (21718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6212 states to 6212 states and 21718 transitions. [2021-05-22 02:27:44,531 INFO L78 Accepts]: Start accepts. Automaton has 6212 states and 21718 transitions. Word has length 47 [2021-05-22 02:27:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:44,531 INFO L482 AbstractCegarLoop]: Abstraction has 6212 states and 21718 transitions. [2021-05-22 02:27:44,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6212 states and 21718 transitions. [2021-05-22 02:27:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:44,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:44,540 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:44,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-22 02:27:44,540 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 928752500, now seen corresponding path program 111 times [2021-05-22 02:27:44,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:44,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870557079] [2021-05-22 02:27:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:44,802 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 02:27:44,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:44,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870557079] [2021-05-22 02:27:44,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870557079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:44,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:44,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:44,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927667304] [2021-05-22 02:27:44,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:44,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:44,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:44,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:44,803 INFO L87 Difference]: Start difference. First operand 6212 states and 21718 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:45,844 INFO L93 Difference]: Finished difference Result 6861 states and 23891 transitions. [2021-05-22 02:27:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:27:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:45,856 INFO L225 Difference]: With dead ends: 6861 [2021-05-22 02:27:45,856 INFO L226 Difference]: Without dead ends: 6636 [2021-05-22 02:27:45,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:27:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2021-05-22 02:27:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 6132. [2021-05-22 02:27:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 3.500570869352471) internal successors, (21462), 6131 states have internal predecessors, (21462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 21462 transitions. [2021-05-22 02:27:45,945 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 21462 transitions. Word has length 47 [2021-05-22 02:27:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:45,945 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 21462 transitions. [2021-05-22 02:27:45,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 21462 transitions. [2021-05-22 02:27:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:45,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:45,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:45,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-22 02:27:45,953 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:45,953 INFO L82 PathProgramCache]: Analyzing trace with hash 818403224, now seen corresponding path program 112 times [2021-05-22 02:27:45,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:45,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944197498] [2021-05-22 02:27:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:46,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:46,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944197498] [2021-05-22 02:27:46,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944197498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:46,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:46,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:46,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138737820] [2021-05-22 02:27:46,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:46,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:46,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:46,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:46,166 INFO L87 Difference]: Start difference. First operand 6132 states and 21462 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:47,143 INFO L93 Difference]: Finished difference Result 6885 states and 23895 transitions. [2021-05-22 02:27:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:27:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:47,155 INFO L225 Difference]: With dead ends: 6885 [2021-05-22 02:27:47,155 INFO L226 Difference]: Without dead ends: 6748 [2021-05-22 02:27:47,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:27:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-05-22 02:27:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6138. [2021-05-22 02:27:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6138 states, 6137 states have (on average 3.500570311226984) internal successors, (21483), 6137 states have internal predecessors, (21483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6138 states to 6138 states and 21483 transitions. [2021-05-22 02:27:47,247 INFO L78 Accepts]: Start accepts. Automaton has 6138 states and 21483 transitions. Word has length 47 [2021-05-22 02:27:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:47,247 INFO L482 AbstractCegarLoop]: Abstraction has 6138 states and 21483 transitions. [2021-05-22 02:27:47,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6138 states and 21483 transitions. [2021-05-22 02:27:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:47,255 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:47,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:47,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-22 02:27:47,255 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1958867850, now seen corresponding path program 113 times [2021-05-22 02:27:47,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:47,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611481548] [2021-05-22 02:27:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:47,499 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 02:27:47,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:47,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611481548] [2021-05-22 02:27:47,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611481548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:47,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:47,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:47,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931171058] [2021-05-22 02:27:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:47,500 INFO L87 Difference]: Start difference. First operand 6138 states and 21483 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:48,620 INFO L93 Difference]: Finished difference Result 7035 states and 24317 transitions. [2021-05-22 02:27:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:27:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:48,632 INFO L225 Difference]: With dead ends: 7035 [2021-05-22 02:27:48,632 INFO L226 Difference]: Without dead ends: 6946 [2021-05-22 02:27:48,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:27:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6946 states. [2021-05-22 02:27:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6946 to 6138. [2021-05-22 02:27:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6138 states, 6137 states have (on average 3.500570311226984) internal successors, (21483), 6137 states have internal predecessors, (21483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6138 states to 6138 states and 21483 transitions. [2021-05-22 02:27:48,725 INFO L78 Accepts]: Start accepts. Automaton has 6138 states and 21483 transitions. Word has length 47 [2021-05-22 02:27:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:48,726 INFO L482 AbstractCegarLoop]: Abstraction has 6138 states and 21483 transitions. [2021-05-22 02:27:48,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6138 states and 21483 transitions. [2021-05-22 02:27:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:48,733 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:48,733 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:48,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-22 02:27:48,733 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1524838504, now seen corresponding path program 114 times [2021-05-22 02:27:48,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:48,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814769471] [2021-05-22 02:27:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:48,960 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 02:27:48,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814769471] [2021-05-22 02:27:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814769471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:48,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:48,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:48,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383346462] [2021-05-22 02:27:48,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:48,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:48,961 INFO L87 Difference]: Start difference. First operand 6138 states and 21483 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:50,015 INFO L93 Difference]: Finished difference Result 6944 states and 24046 transitions. [2021-05-22 02:27:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:27:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:50,027 INFO L225 Difference]: With dead ends: 6944 [2021-05-22 02:27:50,027 INFO L226 Difference]: Without dead ends: 6815 [2021-05-22 02:27:50,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:27:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6815 states. [2021-05-22 02:27:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6815 to 6138. [2021-05-22 02:27:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6138 states, 6137 states have (on average 3.4995926348378688) internal successors, (21477), 6137 states have internal predecessors, (21477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6138 states to 6138 states and 21477 transitions. [2021-05-22 02:27:50,118 INFO L78 Accepts]: Start accepts. Automaton has 6138 states and 21477 transitions. Word has length 47 [2021-05-22 02:27:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:50,118 INFO L482 AbstractCegarLoop]: Abstraction has 6138 states and 21477 transitions. [2021-05-22 02:27:50,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6138 states and 21477 transitions. [2021-05-22 02:27:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:50,126 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:50,126 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:50,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-22 02:27:50,127 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:50,127 INFO L82 PathProgramCache]: Analyzing trace with hash 984588342, now seen corresponding path program 115 times [2021-05-22 02:27:50,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:50,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610370309] [2021-05-22 02:27:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:50,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:50,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610370309] [2021-05-22 02:27:50,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610370309] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:50,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:50,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:27:50,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144266321] [2021-05-22 02:27:50,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:50,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:50,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:50,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:50,384 INFO L87 Difference]: Start difference. First operand 6138 states and 21477 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:53,057 INFO L93 Difference]: Finished difference Result 9355 states and 32755 transitions. [2021-05-22 02:27:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-22 02:27:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:53,072 INFO L225 Difference]: With dead ends: 9355 [2021-05-22 02:27:53,072 INFO L226 Difference]: Without dead ends: 9218 [2021-05-22 02:27:53,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1480.8ms TimeCoverageRelationStatistics Valid=404, Invalid=4152, Unknown=0, NotChecked=0, Total=4556 [2021-05-22 02:27:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-05-22 02:27:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 6184. [2021-05-22 02:27:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 3.495390587093644) internal successors, (21612), 6183 states have internal predecessors, (21612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 21612 transitions. [2021-05-22 02:27:53,177 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 21612 transitions. Word has length 47 [2021-05-22 02:27:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:53,177 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 21612 transitions. [2021-05-22 02:27:53,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 21612 transitions. [2021-05-22 02:27:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:53,186 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:53,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:53,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-22 02:27:53,186 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash 971056920, now seen corresponding path program 116 times [2021-05-22 02:27:53,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:53,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044745099] [2021-05-22 02:27:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:53,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:53,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044745099] [2021-05-22 02:27:53,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044745099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:53,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:53,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:53,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945498391] [2021-05-22 02:27:53,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:53,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:53,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:53,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:53,414 INFO L87 Difference]: Start difference. First operand 6184 states and 21612 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:56,407 INFO L93 Difference]: Finished difference Result 10525 states and 37110 transitions. [2021-05-22 02:27:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 02:27:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:56,431 INFO L225 Difference]: With dead ends: 10525 [2021-05-22 02:27:56,432 INFO L226 Difference]: Without dead ends: 10436 [2021-05-22 02:27:56,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1757.6ms TimeCoverageRelationStatistics Valid=531, Invalid=5019, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:27:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10436 states. [2021-05-22 02:27:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10436 to 6188. [2021-05-22 02:27:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6188 states, 6187 states have (on average 3.4944237918215615) internal successors, (21620), 6187 states have internal predecessors, (21620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6188 states to 6188 states and 21620 transitions. [2021-05-22 02:27:56,552 INFO L78 Accepts]: Start accepts. Automaton has 6188 states and 21620 transitions. Word has length 47 [2021-05-22 02:27:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:56,552 INFO L482 AbstractCegarLoop]: Abstraction has 6188 states and 21620 transitions. [2021-05-22 02:27:56,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6188 states and 21620 transitions. [2021-05-22 02:27:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:56,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:56,560 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:56,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-22 02:27:56,561 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 120405012, now seen corresponding path program 117 times [2021-05-22 02:27:56,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:56,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282772508] [2021-05-22 02:27:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:56,799 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 02:27:56,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282772508] [2021-05-22 02:27:56,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282772508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:56,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:56,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:27:56,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960631791] [2021-05-22 02:27:56,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:56,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:56,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:56,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:56,800 INFO L87 Difference]: Start difference. First operand 6188 states and 21620 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:59,696 INFO L93 Difference]: Finished difference Result 10604 states and 37526 transitions. [2021-05-22 02:27:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:27:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:27:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:59,715 INFO L225 Difference]: With dead ends: 10604 [2021-05-22 02:27:59,715 INFO L226 Difference]: Without dead ends: 10497 [2021-05-22 02:27:59,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 1677.9ms TimeCoverageRelationStatistics Valid=484, Invalid=4628, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:27:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10497 states. [2021-05-22 02:27:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10497 to 6146. [2021-05-22 02:27:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6145 states have (on average 3.497965825874695) internal successors, (21495), 6145 states have internal predecessors, (21495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 21495 transitions. [2021-05-22 02:27:59,829 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 21495 transitions. Word has length 47 [2021-05-22 02:27:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 6146 states and 21495 transitions. [2021-05-22 02:27:59,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 21495 transitions. [2021-05-22 02:27:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:27:59,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:59,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:59,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-22 02:27:59,838 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:59,838 INFO L82 PathProgramCache]: Analyzing trace with hash 21038872, now seen corresponding path program 118 times [2021-05-22 02:27:59,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:59,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027679974] [2021-05-22 02:27:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:00,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027679974] [2021-05-22 02:28:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027679974] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:00,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:00,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:00,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325621670] [2021-05-22 02:28:00,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:00,084 INFO L87 Difference]: Start difference. First operand 6146 states and 21495 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:01,246 INFO L93 Difference]: Finished difference Result 7096 states and 24509 transitions. [2021-05-22 02:28:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:28:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:01,258 INFO L225 Difference]: With dead ends: 7096 [2021-05-22 02:28:01,258 INFO L226 Difference]: Without dead ends: 7007 [2021-05-22 02:28:01,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=203, Invalid=1959, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:28:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7007 states. [2021-05-22 02:28:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7007 to 6148. [2021-05-22 02:28:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 3.497966487717586) internal successors, (21502), 6147 states have internal predecessors, (21502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 21502 transitions. [2021-05-22 02:28:01,357 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 21502 transitions. Word has length 47 [2021-05-22 02:28:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:01,358 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 21502 transitions. [2021-05-22 02:28:01,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 21502 transitions. [2021-05-22 02:28:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:01,366 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:01,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:01,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-22 02:28:01,366 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:01,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash -302622952, now seen corresponding path program 119 times [2021-05-22 02:28:01,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:01,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381955119] [2021-05-22 02:28:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:01,607 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 02:28:01,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:01,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381955119] [2021-05-22 02:28:01,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381955119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:01,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:01,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:01,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578147366] [2021-05-22 02:28:01,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:01,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:01,608 INFO L87 Difference]: Start difference. First operand 6148 states and 21502 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:02,746 INFO L93 Difference]: Finished difference Result 7104 states and 24537 transitions. [2021-05-22 02:28:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:28:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:02,757 INFO L225 Difference]: With dead ends: 7104 [2021-05-22 02:28:02,758 INFO L226 Difference]: Without dead ends: 6999 [2021-05-22 02:28:02,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 742.7ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:28:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2021-05-22 02:28:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6148. [2021-05-22 02:28:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 3.4976411257523994) internal successors, (21500), 6147 states have internal predecessors, (21500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 21500 transitions. [2021-05-22 02:28:02,852 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 21500 transitions. Word has length 47 [2021-05-22 02:28:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:02,853 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 21500 transitions. [2021-05-22 02:28:02,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 21500 transitions. [2021-05-22 02:28:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:02,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:02,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:02,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-22 02:28:02,861 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1927389386, now seen corresponding path program 120 times [2021-05-22 02:28:02,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:02,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241754750] [2021-05-22 02:28:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:03,088 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 02:28:03,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:03,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241754750] [2021-05-22 02:28:03,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241754750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:03,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:03,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:03,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103435615] [2021-05-22 02:28:03,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:03,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:03,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:03,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:03,089 INFO L87 Difference]: Start difference. First operand 6148 states and 21500 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:04,519 INFO L93 Difference]: Finished difference Result 7685 states and 26629 transitions. [2021-05-22 02:28:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:28:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:04,533 INFO L225 Difference]: With dead ends: 7685 [2021-05-22 02:28:04,534 INFO L226 Difference]: Without dead ends: 7596 [2021-05-22 02:28:04,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 875.7ms TimeCoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:28:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2021-05-22 02:28:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 6252. [2021-05-22 02:28:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6252 states, 6251 states have (on average 3.493201087825948) internal successors, (21836), 6251 states have internal predecessors, (21836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6252 states to 6252 states and 21836 transitions. [2021-05-22 02:28:04,636 INFO L78 Accepts]: Start accepts. Automaton has 6252 states and 21836 transitions. Word has length 47 [2021-05-22 02:28:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:04,636 INFO L482 AbstractCegarLoop]: Abstraction has 6252 states and 21836 transitions. [2021-05-22 02:28:04,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states and 21836 transitions. [2021-05-22 02:28:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:04,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:04,646 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:04,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-22 02:28:04,646 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:04,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1592460308, now seen corresponding path program 121 times [2021-05-22 02:28:04,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:04,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669435693] [2021-05-22 02:28:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:04,872 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 02:28:04,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:04,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669435693] [2021-05-22 02:28:04,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669435693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:04,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:04,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:04,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485215220] [2021-05-22 02:28:04,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:04,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:04,873 INFO L87 Difference]: Start difference. First operand 6252 states and 21836 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:06,332 INFO L93 Difference]: Finished difference Result 7687 states and 26622 transitions. [2021-05-22 02:28:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:28:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:06,345 INFO L225 Difference]: With dead ends: 7687 [2021-05-22 02:28:06,345 INFO L226 Difference]: Without dead ends: 7592 [2021-05-22 02:28:06,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 861.9ms TimeCoverageRelationStatistics Valid=213, Invalid=2139, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:28:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2021-05-22 02:28:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 6232. [2021-05-22 02:28:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 3.4973519499277805) internal successors, (21792), 6231 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 21792 transitions. [2021-05-22 02:28:06,437 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 21792 transitions. Word has length 47 [2021-05-22 02:28:06,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:06,438 INFO L482 AbstractCegarLoop]: Abstraction has 6232 states and 21792 transitions. [2021-05-22 02:28:06,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 21792 transitions. [2021-05-22 02:28:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:06,446 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:06,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:06,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-22 02:28:06,446 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1891351986, now seen corresponding path program 122 times [2021-05-22 02:28:06,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:06,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282281512] [2021-05-22 02:28:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:06,681 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 02:28:06,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:06,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282281512] [2021-05-22 02:28:06,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282281512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:06,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:06,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:06,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133108370] [2021-05-22 02:28:06,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:06,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:06,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:06,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:06,682 INFO L87 Difference]: Start difference. First operand 6232 states and 21792 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:07,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:07,781 INFO L93 Difference]: Finished difference Result 7069 states and 24460 transitions. [2021-05-22 02:28:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:28:07,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:07,793 INFO L225 Difference]: With dead ends: 7069 [2021-05-22 02:28:07,793 INFO L226 Difference]: Without dead ends: 6972 [2021-05-22 02:28:07,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:28:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6972 states. [2021-05-22 02:28:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6972 to 6246. [2021-05-22 02:28:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6246 states, 6245 states have (on average 3.4938350680544437) internal successors, (21819), 6245 states have internal predecessors, (21819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6246 states to 6246 states and 21819 transitions. [2021-05-22 02:28:07,889 INFO L78 Accepts]: Start accepts. Automaton has 6246 states and 21819 transitions. Word has length 47 [2021-05-22 02:28:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:07,889 INFO L482 AbstractCegarLoop]: Abstraction has 6246 states and 21819 transitions. [2021-05-22 02:28:07,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 6246 states and 21819 transitions. [2021-05-22 02:28:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:07,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:07,897 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:07,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-22 02:28:07,897 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash 165931476, now seen corresponding path program 123 times [2021-05-22 02:28:07,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:07,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858573494] [2021-05-22 02:28:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:08,147 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 02:28:08,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:08,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858573494] [2021-05-22 02:28:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858573494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:08,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:08,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:08,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830633267] [2021-05-22 02:28:08,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:08,148 INFO L87 Difference]: Start difference. First operand 6246 states and 21819 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:09,272 INFO L93 Difference]: Finished difference Result 7045 states and 24370 transitions. [2021-05-22 02:28:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:28:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:09,284 INFO L225 Difference]: With dead ends: 7045 [2021-05-22 02:28:09,284 INFO L226 Difference]: Without dead ends: 6940 [2021-05-22 02:28:09,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 710.5ms TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:28:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6940 states. [2021-05-22 02:28:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6940 to 6232. [2021-05-22 02:28:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 3.4963890226287915) internal successors, (21786), 6231 states have internal predecessors, (21786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 21786 transitions. [2021-05-22 02:28:09,376 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 21786 transitions. Word has length 47 [2021-05-22 02:28:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:09,376 INFO L482 AbstractCegarLoop]: Abstraction has 6232 states and 21786 transitions. [2021-05-22 02:28:09,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 21786 transitions. [2021-05-22 02:28:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:09,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:09,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:09,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-22 02:28:09,385 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1809468076, now seen corresponding path program 124 times [2021-05-22 02:28:09,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:09,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130282299] [2021-05-22 02:28:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:09,620 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 02:28:09,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130282299] [2021-05-22 02:28:09,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130282299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:09,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:09,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:09,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32189220] [2021-05-22 02:28:09,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:09,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:09,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:09,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:09,621 INFO L87 Difference]: Start difference. First operand 6232 states and 21786 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:10,754 INFO L93 Difference]: Finished difference Result 6956 states and 24174 transitions. [2021-05-22 02:28:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:28:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:10,766 INFO L225 Difference]: With dead ends: 6956 [2021-05-22 02:28:10,766 INFO L226 Difference]: Without dead ends: 6867 [2021-05-22 02:28:10,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:28:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-05-22 02:28:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 6236. [2021-05-22 02:28:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6236 states, 6235 states have (on average 3.4963913392141137) internal successors, (21800), 6235 states have internal predecessors, (21800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 21800 transitions. [2021-05-22 02:28:10,863 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 21800 transitions. Word has length 47 [2021-05-22 02:28:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:10,863 INFO L482 AbstractCegarLoop]: Abstraction has 6236 states and 21800 transitions. [2021-05-22 02:28:10,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 21800 transitions. [2021-05-22 02:28:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:10,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:10,872 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:10,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-22 02:28:10,872 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2133129900, now seen corresponding path program 125 times [2021-05-22 02:28:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:10,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130268346] [2021-05-22 02:28:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:11,095 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 02:28:11,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130268346] [2021-05-22 02:28:11,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130268346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:11,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:11,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:11,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263661589] [2021-05-22 02:28:11,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:11,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:11,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:11,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:11,096 INFO L87 Difference]: Start difference. First operand 6236 states and 21800 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:12,225 INFO L93 Difference]: Finished difference Result 6964 states and 24202 transitions. [2021-05-22 02:28:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:28:12,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:12,237 INFO L225 Difference]: With dead ends: 6964 [2021-05-22 02:28:12,237 INFO L226 Difference]: Without dead ends: 6859 [2021-05-22 02:28:12,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 764.9ms TimeCoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:28:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2021-05-22 02:28:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 6252. [2021-05-22 02:28:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6252 states, 6251 states have (on average 3.495120780675092) internal successors, (21848), 6251 states have internal predecessors, (21848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6252 states to 6252 states and 21848 transitions. [2021-05-22 02:28:12,329 INFO L78 Accepts]: Start accepts. Automaton has 6252 states and 21848 transitions. Word has length 47 [2021-05-22 02:28:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:12,329 INFO L482 AbstractCegarLoop]: Abstraction has 6252 states and 21848 transitions. [2021-05-22 02:28:12,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states and 21848 transitions. [2021-05-22 02:28:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:12,337 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:12,337 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:12,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-22 02:28:12,338 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2077018446, now seen corresponding path program 126 times [2021-05-22 02:28:12,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:12,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793382253] [2021-05-22 02:28:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:12,563 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 02:28:12,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:12,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793382253] [2021-05-22 02:28:12,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793382253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:12,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:12,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:12,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78204306] [2021-05-22 02:28:12,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:12,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:12,564 INFO L87 Difference]: Start difference. First operand 6252 states and 21848 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:13,738 INFO L93 Difference]: Finished difference Result 6933 states and 24139 transitions. [2021-05-22 02:28:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:28:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:13,749 INFO L225 Difference]: With dead ends: 6933 [2021-05-22 02:28:13,749 INFO L226 Difference]: Without dead ends: 6772 [2021-05-22 02:28:13,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:28:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-05-22 02:28:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6236. [2021-05-22 02:28:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6236 states, 6235 states have (on average 3.4957497995188453) internal successors, (21796), 6235 states have internal predecessors, (21796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 21796 transitions. [2021-05-22 02:28:13,842 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 21796 transitions. Word has length 47 [2021-05-22 02:28:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:13,842 INFO L482 AbstractCegarLoop]: Abstraction has 6236 states and 21796 transitions. [2021-05-22 02:28:13,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 21796 transitions. [2021-05-22 02:28:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:13,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:13,852 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:13,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-22 02:28:13,852 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1926959818, now seen corresponding path program 127 times [2021-05-22 02:28:13,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:13,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227500211] [2021-05-22 02:28:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:14,076 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 02:28:14,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:14,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227500211] [2021-05-22 02:28:14,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227500211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:14,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:14,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:14,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188810854] [2021-05-22 02:28:14,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:14,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:14,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:14,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:14,077 INFO L87 Difference]: Start difference. First operand 6236 states and 21796 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:15,224 INFO L93 Difference]: Finished difference Result 7096 states and 24537 transitions. [2021-05-22 02:28:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:28:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:15,237 INFO L225 Difference]: With dead ends: 7096 [2021-05-22 02:28:15,237 INFO L226 Difference]: Without dead ends: 7007 [2021-05-22 02:28:15,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 783.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:28:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7007 states. [2021-05-22 02:28:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7007 to 6238. [2021-05-22 02:28:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6238 states, 6237 states have (on average 3.4957511624178292) internal successors, (21803), 6237 states have internal predecessors, (21803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 21803 transitions. [2021-05-22 02:28:15,325 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 21803 transitions. Word has length 47 [2021-05-22 02:28:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:15,325 INFO L482 AbstractCegarLoop]: Abstraction has 6238 states and 21803 transitions. [2021-05-22 02:28:15,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 21803 transitions. [2021-05-22 02:28:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:15,333 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:15,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:15,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-22 02:28:15,333 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:15,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2044345654, now seen corresponding path program 128 times [2021-05-22 02:28:15,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:15,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401382185] [2021-05-22 02:28:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:15,565 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 02:28:15,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:15,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401382185] [2021-05-22 02:28:15,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401382185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:15,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:15,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:15,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145676930] [2021-05-22 02:28:15,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:15,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:15,567 INFO L87 Difference]: Start difference. First operand 6238 states and 21803 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:16,650 INFO L93 Difference]: Finished difference Result 7104 states and 24565 transitions. [2021-05-22 02:28:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:28:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:16,662 INFO L225 Difference]: With dead ends: 7104 [2021-05-22 02:28:16,662 INFO L226 Difference]: Without dead ends: 6999 [2021-05-22 02:28:16,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:28:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2021-05-22 02:28:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6238. [2021-05-22 02:28:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6238 states, 6237 states have (on average 3.4954304954304956) internal successors, (21801), 6237 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 21801 transitions. [2021-05-22 02:28:16,760 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 21801 transitions. Word has length 47 [2021-05-22 02:28:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:16,760 INFO L482 AbstractCegarLoop]: Abstraction has 6238 states and 21801 transitions. [2021-05-22 02:28:16,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 21801 transitions. [2021-05-22 02:28:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:16,768 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:16,768 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:16,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-22 02:28:16,768 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:16,769 INFO L82 PathProgramCache]: Analyzing trace with hash 419579220, now seen corresponding path program 129 times [2021-05-22 02:28:16,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:16,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488454564] [2021-05-22 02:28:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:16,994 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 02:28:16,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488454564] [2021-05-22 02:28:16,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488454564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:16,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:16,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:16,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127486406] [2021-05-22 02:28:16,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:16,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:16,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:16,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:16,995 INFO L87 Difference]: Start difference. First operand 6238 states and 21801 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:18,692 INFO L93 Difference]: Finished difference Result 8205 states and 28472 transitions. [2021-05-22 02:28:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:28:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:18,707 INFO L225 Difference]: With dead ends: 8205 [2021-05-22 02:28:18,707 INFO L226 Difference]: Without dead ends: 8100 [2021-05-22 02:28:18,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 982.2ms TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:28:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2021-05-22 02:28:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 6184. [2021-05-22 02:28:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 3.4957140546660197) internal successors, (21614), 6183 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 21614 transitions. [2021-05-22 02:28:18,810 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 21614 transitions. Word has length 47 [2021-05-22 02:28:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:18,811 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 21614 transitions. [2021-05-22 02:28:18,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 21614 transitions. [2021-05-22 02:28:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:18,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:18,820 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:18,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-22 02:28:18,821 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash -355538382, now seen corresponding path program 130 times [2021-05-22 02:28:18,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:18,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410979730] [2021-05-22 02:28:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:19,065 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 02:28:19,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410979730] [2021-05-22 02:28:19,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410979730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:19,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:19,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:19,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859878344] [2021-05-22 02:28:19,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:19,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:19,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:19,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:19,066 INFO L87 Difference]: Start difference. First operand 6184 states and 21614 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:20,665 INFO L93 Difference]: Finished difference Result 8191 states and 28417 transitions. [2021-05-22 02:28:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:28:20,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:20,679 INFO L225 Difference]: With dead ends: 8191 [2021-05-22 02:28:20,679 INFO L226 Difference]: Without dead ends: 8096 [2021-05-22 02:28:20,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 905.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:28:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2021-05-22 02:28:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 6148. [2021-05-22 02:28:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 3.498291849682772) internal successors, (21504), 6147 states have internal predecessors, (21504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 21504 transitions. [2021-05-22 02:28:20,782 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 21504 transitions. Word has length 47 [2021-05-22 02:28:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:20,782 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 21504 transitions. [2021-05-22 02:28:20,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 21504 transitions. [2021-05-22 02:28:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:20,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:20,791 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:20,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-22 02:28:20,791 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:20,791 INFO L82 PathProgramCache]: Analyzing trace with hash -56646704, now seen corresponding path program 131 times [2021-05-22 02:28:20,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:20,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487585210] [2021-05-22 02:28:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:21,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:21,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487585210] [2021-05-22 02:28:21,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487585210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:21,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:21,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:21,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704659272] [2021-05-22 02:28:21,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:21,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:21,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:21,015 INFO L87 Difference]: Start difference. First operand 6148 states and 21504 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:22,103 INFO L93 Difference]: Finished difference Result 7016 states and 24273 transitions. [2021-05-22 02:28:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:28:22,104 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:22,115 INFO L225 Difference]: With dead ends: 7016 [2021-05-22 02:28:22,115 INFO L226 Difference]: Without dead ends: 6919 [2021-05-22 02:28:22,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:28:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6919 states. [2021-05-22 02:28:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6919 to 6160. [2021-05-22 02:28:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.496022081506738) internal successors, (21532), 6159 states have internal predecessors, (21532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21532 transitions. [2021-05-22 02:28:22,213 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21532 transitions. Word has length 47 [2021-05-22 02:28:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:22,214 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21532 transitions. [2021-05-22 02:28:22,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21532 transitions. [2021-05-22 02:28:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:22,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:22,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:22,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-22 02:28:22,222 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1782067214, now seen corresponding path program 132 times [2021-05-22 02:28:22,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:22,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708038480] [2021-05-22 02:28:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:22,450 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 02:28:22,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:22,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708038480] [2021-05-22 02:28:22,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708038480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:22,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:22,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:22,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842483879] [2021-05-22 02:28:22,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:22,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:22,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:22,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:22,451 INFO L87 Difference]: Start difference. First operand 6160 states and 21532 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:23,518 INFO L93 Difference]: Finished difference Result 6992 states and 24183 transitions. [2021-05-22 02:28:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:28:23,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:23,530 INFO L225 Difference]: With dead ends: 6992 [2021-05-22 02:28:23,530 INFO L226 Difference]: Without dead ends: 6893 [2021-05-22 02:28:23,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:28:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6893 states. [2021-05-22 02:28:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6893 to 6152. [2021-05-22 02:28:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 3.4973175093480733) internal successors, (21512), 6151 states have internal predecessors, (21512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 21512 transitions. [2021-05-22 02:28:23,622 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 21512 transitions. Word has length 47 [2021-05-22 02:28:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:23,622 INFO L482 AbstractCegarLoop]: Abstraction has 6152 states and 21512 transitions. [2021-05-22 02:28:23,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 21512 transitions. [2021-05-22 02:28:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:23,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:23,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:23,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-22 02:28:23,630 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -706322650, now seen corresponding path program 133 times [2021-05-22 02:28:23,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:23,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761988919] [2021-05-22 02:28:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:23,856 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 02:28:23,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:23,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761988919] [2021-05-22 02:28:23,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761988919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:23,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:23,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:23,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223633781] [2021-05-22 02:28:23,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:23,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:23,857 INFO L87 Difference]: Start difference. First operand 6152 states and 21512 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:24,924 INFO L93 Difference]: Finished difference Result 6747 states and 23504 transitions. [2021-05-22 02:28:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:28:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:24,934 INFO L225 Difference]: With dead ends: 6747 [2021-05-22 02:28:24,934 INFO L226 Difference]: Without dead ends: 6602 [2021-05-22 02:28:24,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:28:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2021-05-22 02:28:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 6164. [2021-05-22 02:28:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6164 states, 6163 states have (on average 3.495375628752231) internal successors, (21542), 6163 states have internal predecessors, (21542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6164 states to 6164 states and 21542 transitions. [2021-05-22 02:28:25,026 INFO L78 Accepts]: Start accepts. Automaton has 6164 states and 21542 transitions. Word has length 47 [2021-05-22 02:28:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:25,026 INFO L482 AbstractCegarLoop]: Abstraction has 6164 states and 21542 transitions. [2021-05-22 02:28:25,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6164 states and 21542 transitions. [2021-05-22 02:28:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:25,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:25,035 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:25,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-22 02:28:25,035 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1645191940, now seen corresponding path program 134 times [2021-05-22 02:28:25,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:25,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67174476] [2021-05-22 02:28:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:25,260 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 02:28:25,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67174476] [2021-05-22 02:28:25,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67174476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:25,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:25,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:25,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670371979] [2021-05-22 02:28:25,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:25,261 INFO L87 Difference]: Start difference. First operand 6164 states and 21542 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:26,276 INFO L93 Difference]: Finished difference Result 6867 states and 23807 transitions. [2021-05-22 02:28:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:28:26,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:26,287 INFO L225 Difference]: With dead ends: 6867 [2021-05-22 02:28:26,287 INFO L226 Difference]: Without dead ends: 6770 [2021-05-22 02:28:26,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 669.4ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:28:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2021-05-22 02:28:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6170. [2021-05-22 02:28:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 6169 states have (on average 3.4944075214783594) internal successors, (21557), 6169 states have internal predecessors, (21557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 21557 transitions. [2021-05-22 02:28:26,379 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 21557 transitions. Word has length 47 [2021-05-22 02:28:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:26,379 INFO L482 AbstractCegarLoop]: Abstraction has 6170 states and 21557 transitions. [2021-05-22 02:28:26,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 21557 transitions. [2021-05-22 02:28:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:26,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:26,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:26,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-22 02:28:26,387 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash -80228570, now seen corresponding path program 135 times [2021-05-22 02:28:26,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:26,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192376506] [2021-05-22 02:28:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:26,614 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 02:28:26,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:26,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192376506] [2021-05-22 02:28:26,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192376506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:26,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:26,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:28:26,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004738843] [2021-05-22 02:28:26,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:26,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:26,615 INFO L87 Difference]: Start difference. First operand 6170 states and 21557 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:27,606 INFO L93 Difference]: Finished difference Result 6768 states and 23502 transitions. [2021-05-22 02:28:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:28:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:27,618 INFO L225 Difference]: With dead ends: 6768 [2021-05-22 02:28:27,618 INFO L226 Difference]: Without dead ends: 6639 [2021-05-22 02:28:27,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:28:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2021-05-22 02:28:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6132. [2021-05-22 02:28:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 3.501549502528136) internal successors, (21468), 6131 states have internal predecessors, (21468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 21468 transitions. [2021-05-22 02:28:27,707 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 21468 transitions. Word has length 47 [2021-05-22 02:28:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:27,707 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 21468 transitions. [2021-05-22 02:28:27,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 21468 transitions. [2021-05-22 02:28:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:27,715 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:27,715 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:27,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-22 02:28:27,715 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1751248534, now seen corresponding path program 136 times [2021-05-22 02:28:27,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:27,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951627350] [2021-05-22 02:28:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:27,978 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 02:28:27,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:27,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951627350] [2021-05-22 02:28:27,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951627350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:27,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:27,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:28:27,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305446186] [2021-05-22 02:28:27,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:28:27,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:27,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:28:27,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:28:27,979 INFO L87 Difference]: Start difference. First operand 6132 states and 21468 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:28,857 INFO L93 Difference]: Finished difference Result 6669 states and 23217 transitions. [2021-05-22 02:28:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:28:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:28,869 INFO L225 Difference]: With dead ends: 6669 [2021-05-22 02:28:28,869 INFO L226 Difference]: Without dead ends: 6532 [2021-05-22 02:28:28,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:28:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2021-05-22 02:28:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6148. [2021-05-22 02:28:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 3.5002440214738897) internal successors, (21516), 6147 states have internal predecessors, (21516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 21516 transitions. [2021-05-22 02:28:28,959 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 21516 transitions. Word has length 47 [2021-05-22 02:28:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:28,960 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 21516 transitions. [2021-05-22 02:28:28,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 21516 transitions. [2021-05-22 02:28:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:28,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:28,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:28,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-22 02:28:28,968 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:28,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1026022540, now seen corresponding path program 137 times [2021-05-22 02:28:28,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:28,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664913922] [2021-05-22 02:28:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:29,186 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 02:28:29,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:29,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664913922] [2021-05-22 02:28:29,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664913922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:29,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:29,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:29,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893264793] [2021-05-22 02:28:29,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:29,187 INFO L87 Difference]: Start difference. First operand 6148 states and 21516 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:30,116 INFO L93 Difference]: Finished difference Result 6728 states and 23376 transitions. [2021-05-22 02:28:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:28:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:30,128 INFO L225 Difference]: With dead ends: 6728 [2021-05-22 02:28:30,128 INFO L226 Difference]: Without dead ends: 6639 [2021-05-22 02:28:30,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:28:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2021-05-22 02:28:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6212. [2021-05-22 02:28:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6212 states, 6211 states have (on average 3.49895346965062) internal successors, (21732), 6211 states have internal predecessors, (21732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6212 states to 6212 states and 21732 transitions. [2021-05-22 02:28:30,219 INFO L78 Accepts]: Start accepts. Automaton has 6212 states and 21732 transitions. Word has length 47 [2021-05-22 02:28:30,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:30,220 INFO L482 AbstractCegarLoop]: Abstraction has 6212 states and 21732 transitions. [2021-05-22 02:28:30,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6212 states and 21732 transitions. [2021-05-22 02:28:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:30,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:30,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:30,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-22 02:28:30,228 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -591993194, now seen corresponding path program 138 times [2021-05-22 02:28:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:30,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157100723] [2021-05-22 02:28:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:30,433 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 02:28:30,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157100723] [2021-05-22 02:28:30,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157100723] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:30,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:30,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:30,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625810002] [2021-05-22 02:28:30,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:30,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:30,434 INFO L87 Difference]: Start difference. First operand 6212 states and 21732 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:31,364 INFO L93 Difference]: Finished difference Result 6637 states and 23105 transitions. [2021-05-22 02:28:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:28:31,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:31,375 INFO L225 Difference]: With dead ends: 6637 [2021-05-22 02:28:31,375 INFO L226 Difference]: Without dead ends: 6508 [2021-05-22 02:28:31,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=151, Invalid=1409, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:28:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6508 states. [2021-05-22 02:28:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6508 to 6212. [2021-05-22 02:28:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6212 states, 6211 states have (on average 3.49508935759137) internal successors, (21708), 6211 states have internal predecessors, (21708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6212 states to 6212 states and 21708 transitions. [2021-05-22 02:28:31,466 INFO L78 Accepts]: Start accepts. Automaton has 6212 states and 21708 transitions. Word has length 47 [2021-05-22 02:28:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:31,466 INFO L482 AbstractCegarLoop]: Abstraction has 6212 states and 21708 transitions. [2021-05-22 02:28:31,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6212 states and 21708 transitions. [2021-05-22 02:28:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:31,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:31,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:31,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-22 02:28:31,475 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:31,475 INFO L82 PathProgramCache]: Analyzing trace with hash 969440292, now seen corresponding path program 139 times [2021-05-22 02:28:31,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:31,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196853023] [2021-05-22 02:28:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:31,688 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 02:28:31,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:31,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196853023] [2021-05-22 02:28:31,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196853023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:31,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:31,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:31,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000515227] [2021-05-22 02:28:31,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:31,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:31,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:31,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:31,689 INFO L87 Difference]: Start difference. First operand 6212 states and 21708 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:32,606 INFO L93 Difference]: Finished difference Result 6680 states and 23216 transitions. [2021-05-22 02:28:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:28:32,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:32,617 INFO L225 Difference]: With dead ends: 6680 [2021-05-22 02:28:32,617 INFO L226 Difference]: Without dead ends: 6591 [2021-05-22 02:28:32,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:28:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6591 states. [2021-05-22 02:28:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6591 to 6212. [2021-05-22 02:28:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6212 states, 6211 states have (on average 3.49508935759137) internal successors, (21708), 6211 states have internal predecessors, (21708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6212 states to 6212 states and 21708 transitions. [2021-05-22 02:28:32,707 INFO L78 Accepts]: Start accepts. Automaton has 6212 states and 21708 transitions. Word has length 47 [2021-05-22 02:28:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:32,707 INFO L482 AbstractCegarLoop]: Abstraction has 6212 states and 21708 transitions. [2021-05-22 02:28:32,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6212 states and 21708 transitions. [2021-05-22 02:28:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:32,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:32,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:32,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-22 02:28:32,716 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:32,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1403469638, now seen corresponding path program 140 times [2021-05-22 02:28:32,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:32,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473923321] [2021-05-22 02:28:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:32,922 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 02:28:32,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:32,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473923321] [2021-05-22 02:28:32,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473923321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:32,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:32,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:32,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223629613] [2021-05-22 02:28:32,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:32,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:32,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:32,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:32,923 INFO L87 Difference]: Start difference. First operand 6212 states and 21708 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:33,826 INFO L93 Difference]: Finished difference Result 6688 states and 23244 transitions. [2021-05-22 02:28:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:28:33,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:33,836 INFO L225 Difference]: With dead ends: 6688 [2021-05-22 02:28:33,836 INFO L226 Difference]: Without dead ends: 6583 [2021-05-22 02:28:33,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:28:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-05-22 02:28:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6228. [2021-05-22 02:28:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 3.4938172474706923) internal successors, (21756), 6227 states have internal predecessors, (21756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 21756 transitions. [2021-05-22 02:28:33,921 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 21756 transitions. Word has length 47 [2021-05-22 02:28:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:33,921 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 21756 transitions. [2021-05-22 02:28:33,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 21756 transitions. [2021-05-22 02:28:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:33,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:33,973 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:33,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-22 02:28:33,973 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1618563950, now seen corresponding path program 141 times [2021-05-22 02:28:33,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:33,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589793085] [2021-05-22 02:28:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:34,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:34,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589793085] [2021-05-22 02:28:34,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589793085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:34,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:34,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:34,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292470332] [2021-05-22 02:28:34,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:34,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:34,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:34,180 INFO L87 Difference]: Start difference. First operand 6228 states and 21756 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:35,065 INFO L93 Difference]: Finished difference Result 6581 states and 22917 transitions. [2021-05-22 02:28:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:28:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:35,076 INFO L225 Difference]: With dead ends: 6581 [2021-05-22 02:28:35,076 INFO L226 Difference]: Without dead ends: 6312 [2021-05-22 02:28:35,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:28:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-05-22 02:28:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 6104. [2021-05-22 02:28:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 6103 states have (on average 3.5045059806652468) internal successors, (21388), 6103 states have internal predecessors, (21388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 21388 transitions. [2021-05-22 02:28:35,164 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 21388 transitions. Word has length 47 [2021-05-22 02:28:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:35,164 INFO L482 AbstractCegarLoop]: Abstraction has 6104 states and 21388 transitions. [2021-05-22 02:28:35,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 21388 transitions. [2021-05-22 02:28:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:35,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:35,172 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:35,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-22 02:28:35,172 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1913602850, now seen corresponding path program 142 times [2021-05-22 02:28:35,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:35,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122346477] [2021-05-22 02:28:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:35,381 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 02:28:35,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:35,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122346477] [2021-05-22 02:28:35,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122346477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:35,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:35,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409069230] [2021-05-22 02:28:35,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:35,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:35,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:35,382 INFO L87 Difference]: Start difference. First operand 6104 states and 21388 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:38,463 INFO L93 Difference]: Finished difference Result 10135 states and 35578 transitions. [2021-05-22 02:28:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:28:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:38,481 INFO L225 Difference]: With dead ends: 10135 [2021-05-22 02:28:38,481 INFO L226 Difference]: Without dead ends: 9908 [2021-05-22 02:28:38,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1695.7ms TimeCoverageRelationStatistics Valid=518, Invalid=5334, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:28:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9908 states. [2021-05-22 02:28:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9908 to 6307. [2021-05-22 02:28:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6307 states, 6306 states have (on average 3.5041230574056454) internal successors, (22097), 6306 states have internal predecessors, (22097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 22097 transitions. [2021-05-22 02:28:38,595 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 22097 transitions. Word has length 47 [2021-05-22 02:28:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:38,595 INFO L482 AbstractCegarLoop]: Abstraction has 6307 states and 22097 transitions. [2021-05-22 02:28:38,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 22097 transitions. [2021-05-22 02:28:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:38,604 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:38,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:38,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-22 02:28:38,604 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:38,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1598110108, now seen corresponding path program 143 times [2021-05-22 02:28:38,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:38,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412573084] [2021-05-22 02:28:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:38,829 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 02:28:38,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:38,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412573084] [2021-05-22 02:28:38,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412573084] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:38,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:38,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:38,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603024256] [2021-05-22 02:28:38,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:38,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:38,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:38,830 INFO L87 Difference]: Start difference. First operand 6307 states and 22097 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:44,332 INFO L93 Difference]: Finished difference Result 12884 states and 45400 transitions. [2021-05-22 02:28:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-22 02:28:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:44,355 INFO L225 Difference]: With dead ends: 12884 [2021-05-22 02:28:44,355 INFO L226 Difference]: Without dead ends: 12525 [2021-05-22 02:28:44,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3452.1ms TimeCoverageRelationStatistics Valid=1263, Invalid=13743, Unknown=0, NotChecked=0, Total=15006 [2021-05-22 02:28:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12525 states. [2021-05-22 02:28:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12525 to 7156. [2021-05-22 02:28:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7156 states, 7155 states have (on average 3.527183787561146) internal successors, (25237), 7155 states have internal predecessors, (25237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7156 states to 7156 states and 25237 transitions. [2021-05-22 02:28:44,488 INFO L78 Accepts]: Start accepts. Automaton has 7156 states and 25237 transitions. Word has length 47 [2021-05-22 02:28:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:44,488 INFO L482 AbstractCegarLoop]: Abstraction has 7156 states and 25237 transitions. [2021-05-22 02:28:44,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7156 states and 25237 transitions. [2021-05-22 02:28:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:44,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:44,498 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:44,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-22 02:28:44,498 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 747458200, now seen corresponding path program 144 times [2021-05-22 02:28:44,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:44,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271639316] [2021-05-22 02:28:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:44,769 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 02:28:44,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:44,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271639316] [2021-05-22 02:28:44,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271639316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:44,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:44,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:44,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19123731] [2021-05-22 02:28:44,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:44,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:44,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:44,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:44,770 INFO L87 Difference]: Start difference. First operand 7156 states and 25237 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:49,264 INFO L93 Difference]: Finished difference Result 12739 states and 45281 transitions. [2021-05-22 02:28:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-22 02:28:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:49,288 INFO L225 Difference]: With dead ends: 12739 [2021-05-22 02:28:49,288 INFO L226 Difference]: Without dead ends: 12536 [2021-05-22 02:28:49,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4008 ImplicationChecksByTransitivity, 2811.4ms TimeCoverageRelationStatistics Valid=943, Invalid=10829, Unknown=0, NotChecked=0, Total=11772 [2021-05-22 02:28:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12536 states. [2021-05-22 02:28:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12536 to 7188. [2021-05-22 02:28:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.5301238347015444) internal successors, (25371), 7187 states have internal predecessors, (25371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 25371 transitions. [2021-05-22 02:28:49,423 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 25371 transitions. Word has length 47 [2021-05-22 02:28:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:49,423 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 25371 transitions. [2021-05-22 02:28:49,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 25371 transitions. [2021-05-22 02:28:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:49,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:49,433 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:49,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-05-22 02:28:49,433 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1371701544, now seen corresponding path program 145 times [2021-05-22 02:28:49,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:49,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209374675] [2021-05-22 02:28:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:49,631 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 02:28:49,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209374675] [2021-05-22 02:28:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209374675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:49,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:49,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:28:49,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561710122] [2021-05-22 02:28:49,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:28:49,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:49,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:28:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:28:49,632 INFO L87 Difference]: Start difference. First operand 7188 states and 25371 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:53,954 INFO L93 Difference]: Finished difference Result 11886 states and 41418 transitions. [2021-05-22 02:28:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-22 02:28:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:53,974 INFO L225 Difference]: With dead ends: 11886 [2021-05-22 02:28:53,974 INFO L226 Difference]: Without dead ends: 11431 [2021-05-22 02:28:53,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 2596.3ms TimeCoverageRelationStatistics Valid=883, Invalid=9623, Unknown=0, NotChecked=0, Total=10506 [2021-05-22 02:28:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2021-05-22 02:28:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 7463. [2021-05-22 02:28:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7463 states, 7462 states have (on average 3.528142589118199) internal successors, (26327), 7462 states have internal predecessors, (26327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7463 states to 7463 states and 26327 transitions. [2021-05-22 02:28:54,113 INFO L78 Accepts]: Start accepts. Automaton has 7463 states and 26327 transitions. Word has length 47 [2021-05-22 02:28:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:54,113 INFO L482 AbstractCegarLoop]: Abstraction has 7463 states and 26327 transitions. [2021-05-22 02:28:54,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7463 states and 26327 transitions. [2021-05-22 02:28:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:28:54,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:54,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:54,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-22 02:28:54,123 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash 944391290, now seen corresponding path program 146 times [2021-05-22 02:28:54,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:54,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185287143] [2021-05-22 02:28:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:54,330 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 02:28:54,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:54,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185287143] [2021-05-22 02:28:54,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185287143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:28:54,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:28:54,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:28:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232112073] [2021-05-22 02:28:54,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:54,331 INFO L87 Difference]: Start difference. First operand 7463 states and 26327 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:59,997 INFO L93 Difference]: Finished difference Result 13404 states and 47111 transitions. [2021-05-22 02:28:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-22 02:28:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:28:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:00,021 INFO L225 Difference]: With dead ends: 13404 [2021-05-22 02:29:00,022 INFO L226 Difference]: Without dead ends: 13078 [2021-05-22 02:29:00,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 3435.1ms TimeCoverageRelationStatistics Valid=1198, Invalid=13564, Unknown=0, NotChecked=0, Total=14762 [2021-05-22 02:29:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-05-22 02:29:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 7625. [2021-05-22 02:29:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.536332633788038) internal successors, (26961), 7624 states have internal predecessors, (26961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 26961 transitions. [2021-05-22 02:29:00,165 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 26961 transitions. Word has length 47 [2021-05-22 02:29:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:00,166 INFO L482 AbstractCegarLoop]: Abstraction has 7625 states and 26961 transitions. [2021-05-22 02:29:00,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 26961 transitions. [2021-05-22 02:29:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:00,176 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:00,176 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-05-22 02:29:00,176 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash 93739382, now seen corresponding path program 147 times [2021-05-22 02:29:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:00,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670481504] [2021-05-22 02:29:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:00,381 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 02:29:00,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:00,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670481504] [2021-05-22 02:29:00,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670481504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:00,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:00,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:29:00,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141548563] [2021-05-22 02:29:00,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:29:00,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:29:00,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:29:00,382 INFO L87 Difference]: Start difference. First operand 7625 states and 26961 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:05,683 INFO L93 Difference]: Finished difference Result 13323 states and 47094 transitions. [2021-05-22 02:29:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-22 02:29:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:05,708 INFO L225 Difference]: With dead ends: 13323 [2021-05-22 02:29:05,708 INFO L226 Difference]: Without dead ends: 13076 [2021-05-22 02:29:05,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4525 ImplicationChecksByTransitivity, 3050.0ms TimeCoverageRelationStatistics Valid=1082, Invalid=12028, Unknown=0, NotChecked=0, Total=13110 [2021-05-22 02:29:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-05-22 02:29:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 7557. [2021-05-22 02:29:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7557 states, 7556 states have (on average 3.5428798305982) internal successors, (26770), 7556 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7557 states to 7557 states and 26770 transitions. [2021-05-22 02:29:05,859 INFO L78 Accepts]: Start accepts. Automaton has 7557 states and 26770 transitions. Word has length 47 [2021-05-22 02:29:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:05,859 INFO L482 AbstractCegarLoop]: Abstraction has 7557 states and 26770 transitions. [2021-05-22 02:29:05,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 7557 states and 26770 transitions. [2021-05-22 02:29:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:05,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:05,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:05,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-05-22 02:29:05,870 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1813193950, now seen corresponding path program 148 times [2021-05-22 02:29:05,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:05,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876645590] [2021-05-22 02:29:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:06,094 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 02:29:06,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:06,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876645590] [2021-05-22 02:29:06,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876645590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:06,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:06,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:06,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985978558] [2021-05-22 02:29:06,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:06,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:06,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:06,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:06,095 INFO L87 Difference]: Start difference. First operand 7557 states and 26770 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:09,582 INFO L93 Difference]: Finished difference Result 12055 states and 42495 transitions. [2021-05-22 02:29:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 02:29:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:09,603 INFO L225 Difference]: With dead ends: 12055 [2021-05-22 02:29:09,603 INFO L226 Difference]: Without dead ends: 11928 [2021-05-22 02:29:09,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1958.0ms TimeCoverageRelationStatistics Valid=605, Invalid=6705, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:29:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2021-05-22 02:29:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 7585. [2021-05-22 02:29:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.539820675105485) internal successors, (26846), 7584 states have internal predecessors, (26846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 26846 transitions. [2021-05-22 02:29:09,743 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 26846 transitions. Word has length 47 [2021-05-22 02:29:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:09,744 INFO L482 AbstractCegarLoop]: Abstraction has 7585 states and 26846 transitions. [2021-05-22 02:29:09,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 26846 transitions. [2021-05-22 02:29:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:09,754 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:09,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:09,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-22 02:29:09,754 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1029939612, now seen corresponding path program 149 times [2021-05-22 02:29:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:09,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821311346] [2021-05-22 02:29:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:10,025 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 02:29:10,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:10,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821311346] [2021-05-22 02:29:10,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821311346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:10,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:10,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:10,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191021551] [2021-05-22 02:29:10,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:10,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:10,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:10,026 INFO L87 Difference]: Start difference. First operand 7585 states and 26846 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:15,685 INFO L93 Difference]: Finished difference Result 14119 states and 49890 transitions. [2021-05-22 02:29:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-22 02:29:15,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:15,711 INFO L225 Difference]: With dead ends: 14119 [2021-05-22 02:29:15,711 INFO L226 Difference]: Without dead ends: 14030 [2021-05-22 02:29:15,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5739 ImplicationChecksByTransitivity, 3524.6ms TimeCoverageRelationStatistics Valid=1316, Invalid=14940, Unknown=0, NotChecked=0, Total=16256 [2021-05-22 02:29:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14030 states. [2021-05-22 02:29:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14030 to 7583. [2021-05-22 02:29:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7583 states, 7582 states have (on average 3.541545766288578) internal successors, (26852), 7582 states have internal predecessors, (26852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7583 states to 7583 states and 26852 transitions. [2021-05-22 02:29:15,856 INFO L78 Accepts]: Start accepts. Automaton has 7583 states and 26852 transitions. Word has length 47 [2021-05-22 02:29:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:15,856 INFO L482 AbstractCegarLoop]: Abstraction has 7583 states and 26852 transitions. [2021-05-22 02:29:15,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7583 states and 26852 transitions. [2021-05-22 02:29:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:15,866 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:15,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:15,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-05-22 02:29:15,866 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash 179287704, now seen corresponding path program 150 times [2021-05-22 02:29:15,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:15,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688529053] [2021-05-22 02:29:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:16,090 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 02:29:16,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:16,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688529053] [2021-05-22 02:29:16,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688529053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:16,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:16,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:16,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600344325] [2021-05-22 02:29:16,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:16,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:16,091 INFO L87 Difference]: Start difference. First operand 7583 states and 26852 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:21,001 INFO L93 Difference]: Finished difference Result 13896 states and 49472 transitions. [2021-05-22 02:29:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-22 02:29:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:21,074 INFO L225 Difference]: With dead ends: 13896 [2021-05-22 02:29:21,074 INFO L226 Difference]: Without dead ends: 13793 [2021-05-22 02:29:21,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 2996.9ms TimeCoverageRelationStatistics Valid=1039, Invalid=12767, Unknown=0, NotChecked=0, Total=13806 [2021-05-22 02:29:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13793 states. [2021-05-22 02:29:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13793 to 7563. [2021-05-22 02:29:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7563 states, 7562 states have (on average 3.54350700872785) internal successors, (26796), 7562 states have internal predecessors, (26796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7563 states to 7563 states and 26796 transitions. [2021-05-22 02:29:21,207 INFO L78 Accepts]: Start accepts. Automaton has 7563 states and 26796 transitions. Word has length 47 [2021-05-22 02:29:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:21,207 INFO L482 AbstractCegarLoop]: Abstraction has 7563 states and 26796 transitions. [2021-05-22 02:29:21,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 7563 states and 26796 transitions. [2021-05-22 02:29:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:21,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:21,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:21,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-22 02:29:21,217 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:21,218 INFO L82 PathProgramCache]: Analyzing trace with hash 200978940, now seen corresponding path program 151 times [2021-05-22 02:29:21,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:21,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043901771] [2021-05-22 02:29:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:21,440 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 02:29:21,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:21,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043901771] [2021-05-22 02:29:21,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043901771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:21,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:21,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:21,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005657137] [2021-05-22 02:29:21,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:21,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:21,441 INFO L87 Difference]: Start difference. First operand 7563 states and 26796 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:24,326 INFO L93 Difference]: Finished difference Result 11395 states and 40165 transitions. [2021-05-22 02:29:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 02:29:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:24,346 INFO L225 Difference]: With dead ends: 11395 [2021-05-22 02:29:24,346 INFO L226 Difference]: Without dead ends: 11268 [2021-05-22 02:29:24,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1555.6ms TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:29:24,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11268 states. [2021-05-22 02:29:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11268 to 7585. [2021-05-22 02:29:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.5403481012658227) internal successors, (26850), 7584 states have internal predecessors, (26850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 26850 transitions. [2021-05-22 02:29:24,524 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 26850 transitions. Word has length 47 [2021-05-22 02:29:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:24,524 INFO L482 AbstractCegarLoop]: Abstraction has 7585 states and 26850 transitions. [2021-05-22 02:29:24,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 26850 transitions. [2021-05-22 02:29:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:24,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:24,535 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:24,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-05-22 02:29:24,535 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1170218466, now seen corresponding path program 152 times [2021-05-22 02:29:24,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:24,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328572120] [2021-05-22 02:29:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:24,750 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 02:29:24,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:24,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328572120] [2021-05-22 02:29:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328572120] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:24,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:24,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:29:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278632697] [2021-05-22 02:29:24,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:29:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:29:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:29:24,751 INFO L87 Difference]: Start difference. First operand 7585 states and 26850 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:27,317 INFO L93 Difference]: Finished difference Result 11183 states and 39359 transitions. [2021-05-22 02:29:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:29:27,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:27,336 INFO L225 Difference]: With dead ends: 11183 [2021-05-22 02:29:27,336 INFO L226 Difference]: Without dead ends: 11083 [2021-05-22 02:29:27,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1402.4ms TimeCoverageRelationStatistics Valid=430, Invalid=4400, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:29:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11083 states. [2021-05-22 02:29:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11083 to 7594. [2021-05-22 02:29:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7593 states have (on average 3.539049124193336) internal successors, (26872), 7593 states have internal predecessors, (26872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 26872 transitions. [2021-05-22 02:29:27,472 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 26872 transitions. Word has length 47 [2021-05-22 02:29:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:27,472 INFO L482 AbstractCegarLoop]: Abstraction has 7594 states and 26872 transitions. [2021-05-22 02:29:27,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 26872 transitions. [2021-05-22 02:29:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:27,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:27,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:27,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-05-22 02:29:27,483 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1689681340, now seen corresponding path program 153 times [2021-05-22 02:29:27,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:27,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909656820] [2021-05-22 02:29:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:27,761 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 02:29:27,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:27,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909656820] [2021-05-22 02:29:27,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909656820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:27,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:27,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:27,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600709453] [2021-05-22 02:29:27,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:27,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:27,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:27,761 INFO L87 Difference]: Start difference. First operand 7594 states and 26872 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:30,905 INFO L93 Difference]: Finished difference Result 12148 states and 42969 transitions. [2021-05-22 02:29:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-22 02:29:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:30,926 INFO L225 Difference]: With dead ends: 12148 [2021-05-22 02:29:30,926 INFO L226 Difference]: Without dead ends: 12030 [2021-05-22 02:29:30,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 1794.4ms TimeCoverageRelationStatistics Valid=552, Invalid=6090, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:29:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12030 states. [2021-05-22 02:29:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12030 to 7567. [2021-05-22 02:29:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7567 states, 7566 states have (on average 3.542426645519429) internal successors, (26802), 7566 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7567 states to 7567 states and 26802 transitions. [2021-05-22 02:29:31,067 INFO L78 Accepts]: Start accepts. Automaton has 7567 states and 26802 transitions. Word has length 47 [2021-05-22 02:29:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:31,067 INFO L482 AbstractCegarLoop]: Abstraction has 7567 states and 26802 transitions. [2021-05-22 02:29:31,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 7567 states and 26802 transitions. [2021-05-22 02:29:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:31,125 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:31,125 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:31,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-22 02:29:31,125 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1479925348, now seen corresponding path program 154 times [2021-05-22 02:29:31,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:31,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636025386] [2021-05-22 02:29:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:31,352 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 02:29:31,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:31,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636025386] [2021-05-22 02:29:31,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636025386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:31,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:31,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:31,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549742814] [2021-05-22 02:29:31,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:31,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:31,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:31,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:31,353 INFO L87 Difference]: Start difference. First operand 7567 states and 26802 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:34,950 INFO L93 Difference]: Finished difference Result 12460 states and 43711 transitions. [2021-05-22 02:29:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-22 02:29:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:34,974 INFO L225 Difference]: With dead ends: 12460 [2021-05-22 02:29:34,974 INFO L226 Difference]: Without dead ends: 12322 [2021-05-22 02:29:34,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 2241.5ms TimeCoverageRelationStatistics Valid=707, Invalid=7849, Unknown=0, NotChecked=0, Total=8556 [2021-05-22 02:29:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12322 states. [2021-05-22 02:29:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12322 to 7573. [2021-05-22 02:29:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7573 states, 7572 states have (on average 3.541336502905441) internal successors, (26815), 7572 states have internal predecessors, (26815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7573 states to 7573 states and 26815 transitions. [2021-05-22 02:29:35,116 INFO L78 Accepts]: Start accepts. Automaton has 7573 states and 26815 transitions. Word has length 47 [2021-05-22 02:29:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:35,116 INFO L482 AbstractCegarLoop]: Abstraction has 7573 states and 26815 transitions. [2021-05-22 02:29:35,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7573 states and 26815 transitions. [2021-05-22 02:29:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:35,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:35,127 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:35,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-05-22 02:29:35,127 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1651343000, now seen corresponding path program 155 times [2021-05-22 02:29:35,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:35,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629031378] [2021-05-22 02:29:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:35,368 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 02:29:35,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:35,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629031378] [2021-05-22 02:29:35,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629031378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:35,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:35,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:35,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588679870] [2021-05-22 02:29:35,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:35,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:35,369 INFO L87 Difference]: Start difference. First operand 7573 states and 26815 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:39,598 INFO L93 Difference]: Finished difference Result 13753 states and 48494 transitions. [2021-05-22 02:29:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-22 02:29:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:39,624 INFO L225 Difference]: With dead ends: 13753 [2021-05-22 02:29:39,624 INFO L226 Difference]: Without dead ends: 13658 [2021-05-22 02:29:39,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3421 ImplicationChecksByTransitivity, 2532.7ms TimeCoverageRelationStatistics Valid=827, Invalid=9679, Unknown=0, NotChecked=0, Total=10506 [2021-05-22 02:29:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13658 states. [2021-05-22 02:29:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13658 to 7575. [2021-05-22 02:29:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7575 states, 7574 states have (on average 3.541853710060734) internal successors, (26826), 7574 states have internal predecessors, (26826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7575 states to 7575 states and 26826 transitions. [2021-05-22 02:29:39,779 INFO L78 Accepts]: Start accepts. Automaton has 7575 states and 26826 transitions. Word has length 47 [2021-05-22 02:29:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:39,779 INFO L482 AbstractCegarLoop]: Abstraction has 7575 states and 26826 transitions. [2021-05-22 02:29:39,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7575 states and 26826 transitions. [2021-05-22 02:29:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:39,789 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:39,789 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:39,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-05-22 02:29:39,790 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:39,790 INFO L82 PathProgramCache]: Analyzing trace with hash 198312758, now seen corresponding path program 156 times [2021-05-22 02:29:39,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:39,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026765942] [2021-05-22 02:29:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:40,004 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 02:29:40,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026765942] [2021-05-22 02:29:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026765942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:40,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:40,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:29:40,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124828683] [2021-05-22 02:29:40,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:29:40,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:29:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:29:40,005 INFO L87 Difference]: Start difference. First operand 7575 states and 26826 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:42,716 INFO L93 Difference]: Finished difference Result 11987 states and 42145 transitions. [2021-05-22 02:29:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:29:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:42,737 INFO L225 Difference]: With dead ends: 11987 [2021-05-22 02:29:42,737 INFO L226 Difference]: Without dead ends: 11887 [2021-05-22 02:29:42,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1525.9ms TimeCoverageRelationStatistics Valid=496, Invalid=5054, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:29:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2021-05-22 02:29:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 7584. [2021-05-22 02:29:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7584 states, 7583 states have (on average 3.540551233021232) internal successors, (26848), 7583 states have internal predecessors, (26848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7584 states to 7584 states and 26848 transitions. [2021-05-22 02:29:42,876 INFO L78 Accepts]: Start accepts. Automaton has 7584 states and 26848 transitions. Word has length 47 [2021-05-22 02:29:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:42,876 INFO L482 AbstractCegarLoop]: Abstraction has 7584 states and 26848 transitions. [2021-05-22 02:29:42,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 7584 states and 26848 transitions. [2021-05-22 02:29:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:42,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:42,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:42,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-05-22 02:29:42,887 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash 132250200, now seen corresponding path program 157 times [2021-05-22 02:29:42,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:42,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467648100] [2021-05-22 02:29:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:43,122 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 02:29:43,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467648100] [2021-05-22 02:29:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467648100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:43,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:43,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:43,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450515457] [2021-05-22 02:29:43,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:43,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:43,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:43,123 INFO L87 Difference]: Start difference. First operand 7584 states and 26848 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:46,450 INFO L93 Difference]: Finished difference Result 12952 states and 45755 transitions. [2021-05-22 02:29:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:29:46,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:46,474 INFO L225 Difference]: With dead ends: 12952 [2021-05-22 02:29:46,475 INFO L226 Difference]: Without dead ends: 12846 [2021-05-22 02:29:46,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 1929.1ms TimeCoverageRelationStatistics Valid=629, Invalid=7027, Unknown=0, NotChecked=0, Total=7656 [2021-05-22 02:29:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12846 states. [2021-05-22 02:29:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12846 to 7569. [2021-05-22 02:29:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7569 states, 7568 states have (on average 3.5429439746300213) internal successors, (26813), 7568 states have internal predecessors, (26813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7569 states to 7569 states and 26813 transitions. [2021-05-22 02:29:46,620 INFO L78 Accepts]: Start accepts. Automaton has 7569 states and 26813 transitions. Word has length 47 [2021-05-22 02:29:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:46,620 INFO L482 AbstractCegarLoop]: Abstraction has 7569 states and 26813 transitions. [2021-05-22 02:29:46,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 7569 states and 26813 transitions. [2021-05-22 02:29:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:46,631 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:46,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:46,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-05-22 02:29:46,631 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:46,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1900030986, now seen corresponding path program 158 times [2021-05-22 02:29:46,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:46,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338920335] [2021-05-22 02:29:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:46,842 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 02:29:46,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:46,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338920335] [2021-05-22 02:29:46,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338920335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:46,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:46,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:29:46,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836949745] [2021-05-22 02:29:46,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:29:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:46,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:29:46,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:29:46,843 INFO L87 Difference]: Start difference. First operand 7569 states and 26813 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:49,569 INFO L93 Difference]: Finished difference Result 10540 states and 36856 transitions. [2021-05-22 02:29:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:29:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:49,586 INFO L225 Difference]: With dead ends: 10540 [2021-05-22 02:29:49,587 INFO L226 Difference]: Without dead ends: 10403 [2021-05-22 02:29:49,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1618.5ms TimeCoverageRelationStatistics Valid=470, Invalid=4932, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:29:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2021-05-22 02:29:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 7605. [2021-05-22 02:29:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7605 states, 7604 states have (on average 3.5380063124671226) internal successors, (26903), 7604 states have internal predecessors, (26903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7605 states to 7605 states and 26903 transitions. [2021-05-22 02:29:49,715 INFO L78 Accepts]: Start accepts. Automaton has 7605 states and 26903 transitions. Word has length 47 [2021-05-22 02:29:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:49,715 INFO L482 AbstractCegarLoop]: Abstraction has 7605 states and 26903 transitions. [2021-05-22 02:29:49,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 7605 states and 26903 transitions. [2021-05-22 02:29:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:49,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:49,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:49,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-05-22 02:29:49,725 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash -265437258, now seen corresponding path program 159 times [2021-05-22 02:29:49,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:49,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121623336] [2021-05-22 02:29:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:49,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:49,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121623336] [2021-05-22 02:29:49,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121623336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:49,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:49,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:49,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323447275] [2021-05-22 02:29:49,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:49,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:49,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:49,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:49,949 INFO L87 Difference]: Start difference. First operand 7605 states and 26903 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:53,464 INFO L93 Difference]: Finished difference Result 11201 states and 39141 transitions. [2021-05-22 02:29:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-22 02:29:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:29:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:53,482 INFO L225 Difference]: With dead ends: 11201 [2021-05-22 02:29:53,482 INFO L226 Difference]: Without dead ends: 11061 [2021-05-22 02:29:53,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2810 ImplicationChecksByTransitivity, 2188.4ms TimeCoverageRelationStatistics Valid=722, Invalid=8208, Unknown=0, NotChecked=0, Total=8930 [2021-05-22 02:29:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11061 states. [2021-05-22 02:29:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11061 to 7587. [2021-05-22 02:29:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7587 states, 7586 states have (on average 3.5396783548642237) internal successors, (26852), 7586 states have internal predecessors, (26852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7587 states to 7587 states and 26852 transitions. [2021-05-22 02:29:53,612 INFO L78 Accepts]: Start accepts. Automaton has 7587 states and 26852 transitions. Word has length 47 [2021-05-22 02:29:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:53,612 INFO L482 AbstractCegarLoop]: Abstraction has 7587 states and 26852 transitions. [2021-05-22 02:29:53,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:53,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7587 states and 26852 transitions. [2021-05-22 02:29:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:29:53,623 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:53,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:53,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-05-22 02:29:53,623 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash -698461800, now seen corresponding path program 160 times [2021-05-22 02:29:53,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:53,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219646565] [2021-05-22 02:29:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:53,847 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 02:29:53,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:53,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219646565] [2021-05-22 02:29:53,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219646565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:29:53,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:29:53,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:29:53,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266624675] [2021-05-22 02:29:53,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:29:53,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:29:53,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:29:53,848 INFO L87 Difference]: Start difference. First operand 7587 states and 26852 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:00,078 INFO L93 Difference]: Finished difference Result 13812 states and 48433 transitions. [2021-05-22 02:30:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-22 02:30:00,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:00,102 INFO L225 Difference]: With dead ends: 13812 [2021-05-22 02:30:00,102 INFO L226 Difference]: Without dead ends: 13438 [2021-05-22 02:30:00,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6484 ImplicationChecksByTransitivity, 3865.6ms TimeCoverageRelationStatistics Valid=1374, Invalid=16716, Unknown=0, NotChecked=0, Total=18090 [2021-05-22 02:30:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13438 states. [2021-05-22 02:30:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13438 to 7810. [2021-05-22 02:30:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 3.5375848380074273) internal successors, (27625), 7809 states have internal predecessors, (27625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 27625 transitions. [2021-05-22 02:30:00,250 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 27625 transitions. Word has length 47 [2021-05-22 02:30:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:00,250 INFO L482 AbstractCegarLoop]: Abstraction has 7810 states and 27625 transitions. [2021-05-22 02:30:00,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 27625 transitions. [2021-05-22 02:30:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:00,261 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:00,261 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:00,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-05-22 02:30:00,261 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:00,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1549113708, now seen corresponding path program 161 times [2021-05-22 02:30:00,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:00,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229180044] [2021-05-22 02:30:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:00,481 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 02:30:00,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:00,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229180044] [2021-05-22 02:30:00,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229180044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:00,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:00,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:30:00,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535720590] [2021-05-22 02:30:00,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:30:00,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:00,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:30:00,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:30:00,482 INFO L87 Difference]: Start difference. First operand 7810 states and 27625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:06,384 INFO L93 Difference]: Finished difference Result 13744 states and 48414 transitions. [2021-05-22 02:30:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-22 02:30:06,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:06,410 INFO L225 Difference]: With dead ends: 13744 [2021-05-22 02:30:06,410 INFO L226 Difference]: Without dead ends: 13521 [2021-05-22 02:30:06,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5433 ImplicationChecksByTransitivity, 3492.4ms TimeCoverageRelationStatistics Valid=1224, Invalid=14276, Unknown=0, NotChecked=0, Total=15500 [2021-05-22 02:30:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2021-05-22 02:30:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 7542. [2021-05-22 02:30:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7542 states, 7541 states have (on average 3.536931441453388) internal successors, (26672), 7541 states have internal predecessors, (26672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7542 states to 7542 states and 26672 transitions. [2021-05-22 02:30:06,578 INFO L78 Accepts]: Start accepts. Automaton has 7542 states and 26672 transitions. Word has length 47 [2021-05-22 02:30:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:06,579 INFO L482 AbstractCegarLoop]: Abstraction has 7542 states and 26672 transitions. [2021-05-22 02:30:06,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 7542 states and 26672 transitions. [2021-05-22 02:30:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:06,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:06,590 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:06,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-05-22 02:30:06,590 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:06,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1656483066, now seen corresponding path program 162 times [2021-05-22 02:30:06,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:06,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201288017] [2021-05-22 02:30:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:06,861 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 02:30:06,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:06,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201288017] [2021-05-22 02:30:06,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201288017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:06,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:06,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:30:06,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507349387] [2021-05-22 02:30:06,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:30:06,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:06,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:30:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:30:06,862 INFO L87 Difference]: Start difference. First operand 7542 states and 26672 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:10,714 INFO L93 Difference]: Finished difference Result 12404 states and 43474 transitions. [2021-05-22 02:30:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-22 02:30:10,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:10,735 INFO L225 Difference]: With dead ends: 12404 [2021-05-22 02:30:10,735 INFO L226 Difference]: Without dead ends: 12282 [2021-05-22 02:30:10,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 2433.2ms TimeCoverageRelationStatistics Valid=752, Invalid=8560, Unknown=0, NotChecked=0, Total=9312 [2021-05-22 02:30:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12282 states. [2021-05-22 02:30:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12282 to 7548. [2021-05-22 02:30:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7547 states have (on average 3.53584205644627) internal successors, (26685), 7547 states have internal predecessors, (26685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 26685 transitions. [2021-05-22 02:30:10,914 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 26685 transitions. Word has length 47 [2021-05-22 02:30:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:10,914 INFO L482 AbstractCegarLoop]: Abstraction has 7548 states and 26685 transitions. [2021-05-22 02:30:10,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 26685 transitions. [2021-05-22 02:30:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:10,925 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:10,925 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:10,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-05-22 02:30:10,925 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:10,925 INFO L82 PathProgramCache]: Analyzing trace with hash 492784118, now seen corresponding path program 163 times [2021-05-22 02:30:10,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:10,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406461846] [2021-05-22 02:30:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:11,149 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 02:30:11,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:11,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406461846] [2021-05-22 02:30:11,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406461846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:11,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:11,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:30:11,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225688000] [2021-05-22 02:30:11,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:30:11,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:11,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:30:11,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:30:11,150 INFO L87 Difference]: Start difference. First operand 7548 states and 26685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:15,449 INFO L93 Difference]: Finished difference Result 13260 states and 46655 transitions. [2021-05-22 02:30:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-22 02:30:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:15,474 INFO L225 Difference]: With dead ends: 13260 [2021-05-22 02:30:15,475 INFO L226 Difference]: Without dead ends: 13145 [2021-05-22 02:30:15,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 2585.4ms TimeCoverageRelationStatistics Valid=809, Invalid=9493, Unknown=0, NotChecked=0, Total=10302 [2021-05-22 02:30:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-05-22 02:30:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 7550. [2021-05-22 02:30:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7550 states, 7549 states have (on average 3.5355676248509735) internal successors, (26690), 7549 states have internal predecessors, (26690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7550 states to 7550 states and 26690 transitions. [2021-05-22 02:30:15,627 INFO L78 Accepts]: Start accepts. Automaton has 7550 states and 26690 transitions. Word has length 47 [2021-05-22 02:30:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:15,627 INFO L482 AbstractCegarLoop]: Abstraction has 7550 states and 26690 transitions. [2021-05-22 02:30:15,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7550 states and 26690 transitions. [2021-05-22 02:30:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:15,637 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:15,637 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:15,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-05-22 02:30:15,638 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash -960246124, now seen corresponding path program 164 times [2021-05-22 02:30:15,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:15,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739925244] [2021-05-22 02:30:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:15,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:15,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739925244] [2021-05-22 02:30:15,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739925244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:15,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:15,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:30:15,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981889553] [2021-05-22 02:30:15,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:30:15,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:30:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:30:15,871 INFO L87 Difference]: Start difference. First operand 7550 states and 26690 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:18,621 INFO L93 Difference]: Finished difference Result 11476 states and 40361 transitions. [2021-05-22 02:30:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-22 02:30:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:18,640 INFO L225 Difference]: With dead ends: 11476 [2021-05-22 02:30:18,640 INFO L226 Difference]: Without dead ends: 11376 [2021-05-22 02:30:18,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1550.6ms TimeCoverageRelationStatistics Valid=472, Invalid=4784, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:30:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11376 states. [2021-05-22 02:30:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11376 to 7559. [2021-05-22 02:30:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7559 states, 7558 states have (on average 3.5342683249536915) internal successors, (26712), 7558 states have internal predecessors, (26712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7559 states to 7559 states and 26712 transitions. [2021-05-22 02:30:18,774 INFO L78 Accepts]: Start accepts. Automaton has 7559 states and 26712 transitions. Word has length 47 [2021-05-22 02:30:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:18,774 INFO L482 AbstractCegarLoop]: Abstraction has 7559 states and 26712 transitions. [2021-05-22 02:30:18,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 7559 states and 26712 transitions. [2021-05-22 02:30:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:18,784 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:18,784 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:18,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-05-22 02:30:18,785 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1026308682, now seen corresponding path program 165 times [2021-05-22 02:30:18,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:18,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920885548] [2021-05-22 02:30:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:19,055 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 02:30:19,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:19,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920885548] [2021-05-22 02:30:19,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920885548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:19,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:19,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:30:19,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433749644] [2021-05-22 02:30:19,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:30:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:30:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:30:19,057 INFO L87 Difference]: Start difference. First operand 7559 states and 26712 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:22,188 INFO L93 Difference]: Finished difference Result 12033 states and 42383 transitions. [2021-05-22 02:30:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:30:22,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:22,209 INFO L225 Difference]: With dead ends: 12033 [2021-05-22 02:30:22,209 INFO L226 Difference]: Without dead ends: 11913 [2021-05-22 02:30:22,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 1807.5ms TimeCoverageRelationStatistics Valid=536, Invalid=5944, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:30:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11913 states. [2021-05-22 02:30:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11913 to 7530. [2021-05-22 02:30:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7530 states, 7529 states have (on average 3.539115420374552) internal successors, (26646), 7529 states have internal predecessors, (26646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7530 states to 7530 states and 26646 transitions. [2021-05-22 02:30:22,345 INFO L78 Accepts]: Start accepts. Automaton has 7530 states and 26646 transitions. Word has length 47 [2021-05-22 02:30:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:22,346 INFO L482 AbstractCegarLoop]: Abstraction has 7530 states and 26646 transitions. [2021-05-22 02:30:22,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7530 states and 26646 transitions. [2021-05-22 02:30:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:22,356 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:22,356 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:22,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-05-22 02:30:22,356 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash -758680900, now seen corresponding path program 166 times [2021-05-22 02:30:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:22,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894562104] [2021-05-22 02:30:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:22,577 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 02:30:22,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894562104] [2021-05-22 02:30:22,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894562104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:22,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:22,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:30:22,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743233806] [2021-05-22 02:30:22,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:30:22,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:30:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:30:22,578 INFO L87 Difference]: Start difference. First operand 7530 states and 26646 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:25,757 INFO L93 Difference]: Finished difference Result 10968 states and 38743 transitions. [2021-05-22 02:30:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:30:25,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:25,777 INFO L225 Difference]: With dead ends: 10968 [2021-05-22 02:30:25,777 INFO L226 Difference]: Without dead ends: 10735 [2021-05-22 02:30:25,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1807.3ms TimeCoverageRelationStatistics Valid=551, Invalid=5769, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:30:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-05-22 02:30:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 7640. [2021-05-22 02:30:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7640 states, 7639 states have (on average 3.537243094645896) internal successors, (27021), 7639 states have internal predecessors, (27021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7640 states to 7640 states and 27021 transitions. [2021-05-22 02:30:25,922 INFO L78 Accepts]: Start accepts. Automaton has 7640 states and 27021 transitions. Word has length 47 [2021-05-22 02:30:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:25,922 INFO L482 AbstractCegarLoop]: Abstraction has 7640 states and 27021 transitions. [2021-05-22 02:30:25,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7640 states and 27021 transitions. [2021-05-22 02:30:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:25,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:25,933 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:25,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-05-22 02:30:25,933 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1541935238, now seen corresponding path program 167 times [2021-05-22 02:30:25,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:25,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226968484] [2021-05-22 02:30:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:26,141 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 02:30:26,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:26,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226968484] [2021-05-22 02:30:26,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226968484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:26,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:26,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:30:26,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836872738] [2021-05-22 02:30:26,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:30:26,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:26,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:30:26,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:30:26,142 INFO L87 Difference]: Start difference. First operand 7640 states and 27021 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:31,835 INFO L93 Difference]: Finished difference Result 14411 states and 50935 transitions. [2021-05-22 02:30:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-22 02:30:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:31,860 INFO L225 Difference]: With dead ends: 14411 [2021-05-22 02:30:31,861 INFO L226 Difference]: Without dead ends: 14023 [2021-05-22 02:30:31,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5831 ImplicationChecksByTransitivity, 3604.4ms TimeCoverageRelationStatistics Valid=1330, Invalid=14926, Unknown=0, NotChecked=0, Total=16256 [2021-05-22 02:30:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2021-05-22 02:30:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 8088. [2021-05-22 02:30:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8088 states, 8087 states have (on average 3.547174477556572) internal successors, (28686), 8087 states have internal predecessors, (28686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 28686 transitions. [2021-05-22 02:30:32,023 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 28686 transitions. Word has length 47 [2021-05-22 02:30:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:32,023 INFO L482 AbstractCegarLoop]: Abstraction has 8088 states and 28686 transitions. [2021-05-22 02:30:32,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 28686 transitions. [2021-05-22 02:30:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:32,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:32,034 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:32,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-05-22 02:30:32,034 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:32,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1902380150, now seen corresponding path program 168 times [2021-05-22 02:30:32,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:32,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769964252] [2021-05-22 02:30:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:32,237 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 02:30:32,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:32,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769964252] [2021-05-22 02:30:32,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769964252] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:32,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:32,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:30:32,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019756043] [2021-05-22 02:30:32,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:30:32,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:30:32,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:30:32,238 INFO L87 Difference]: Start difference. First operand 8088 states and 28686 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:36,926 INFO L93 Difference]: Finished difference Result 14138 states and 50378 transitions. [2021-05-22 02:30:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-22 02:30:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:36,953 INFO L225 Difference]: With dead ends: 14138 [2021-05-22 02:30:36,954 INFO L226 Difference]: Without dead ends: 13929 [2021-05-22 02:30:36,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 2811.9ms TimeCoverageRelationStatistics Valid=977, Invalid=11455, Unknown=0, NotChecked=0, Total=12432 [2021-05-22 02:30:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-05-22 02:30:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 8086. [2021-05-22 02:30:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8086 states, 8085 states have (on average 3.5500309214594927) internal successors, (28702), 8085 states have internal predecessors, (28702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8086 states to 8086 states and 28702 transitions. [2021-05-22 02:30:37,115 INFO L78 Accepts]: Start accepts. Automaton has 8086 states and 28702 transitions. Word has length 47 [2021-05-22 02:30:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:37,115 INFO L482 AbstractCegarLoop]: Abstraction has 8086 states and 28702 transitions. [2021-05-22 02:30:37,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8086 states and 28702 transitions. [2021-05-22 02:30:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:37,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:37,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:37,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-05-22 02:30:37,131 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:37,131 INFO L82 PathProgramCache]: Analyzing trace with hash -216779594, now seen corresponding path program 169 times [2021-05-22 02:30:37,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:37,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120607667] [2021-05-22 02:30:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:37,332 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 02:30:37,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:37,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120607667] [2021-05-22 02:30:37,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120607667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:37,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:37,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-22 02:30:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237410128] [2021-05-22 02:30:37,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:30:37,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:37,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:30:37,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:30:37,333 INFO L87 Difference]: Start difference. First operand 8086 states and 28702 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:41,805 INFO L93 Difference]: Finished difference Result 12863 states and 44759 transitions. [2021-05-22 02:30:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-22 02:30:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:41,828 INFO L225 Difference]: With dead ends: 12863 [2021-05-22 02:30:41,828 INFO L226 Difference]: Without dead ends: 12427 [2021-05-22 02:30:41,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3987 ImplicationChecksByTransitivity, 2693.9ms TimeCoverageRelationStatistics Valid=929, Invalid=10627, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 02:30:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12427 states. [2021-05-22 02:30:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12427 to 8011. [2021-05-22 02:30:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8011 states, 8010 states have (on average 3.5363295880149814) internal successors, (28326), 8010 states have internal predecessors, (28326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 28326 transitions. [2021-05-22 02:30:41,977 INFO L78 Accepts]: Start accepts. Automaton has 8011 states and 28326 transitions. Word has length 47 [2021-05-22 02:30:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:41,977 INFO L482 AbstractCegarLoop]: Abstraction has 8011 states and 28326 transitions. [2021-05-22 02:30:41,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 8011 states and 28326 transitions. [2021-05-22 02:30:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:41,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:41,988 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:41,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-05-22 02:30:41,988 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2099313240, now seen corresponding path program 170 times [2021-05-22 02:30:41,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:41,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781720134] [2021-05-22 02:30:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:42,188 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 02:30:42,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:42,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781720134] [2021-05-22 02:30:42,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781720134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:42,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:42,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:30:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96511405] [2021-05-22 02:30:42,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:30:42,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:30:42,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:30:42,189 INFO L87 Difference]: Start difference. First operand 8011 states and 28326 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:47,942 INFO L93 Difference]: Finished difference Result 14239 states and 50041 transitions. [2021-05-22 02:30:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-22 02:30:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:47,970 INFO L225 Difference]: With dead ends: 14239 [2021-05-22 02:30:47,970 INFO L226 Difference]: Without dead ends: 13996 [2021-05-22 02:30:47,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5216 ImplicationChecksByTransitivity, 3379.2ms TimeCoverageRelationStatistics Valid=1170, Invalid=13592, Unknown=0, NotChecked=0, Total=14762 [2021-05-22 02:30:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13996 states. [2021-05-22 02:30:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13996 to 7879. [2021-05-22 02:30:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7879 states, 7878 states have (on average 3.535034272658035) internal successors, (27849), 7878 states have internal predecessors, (27849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7879 states to 7879 states and 27849 transitions. [2021-05-22 02:30:48,135 INFO L78 Accepts]: Start accepts. Automaton has 7879 states and 27849 transitions. Word has length 47 [2021-05-22 02:30:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:48,135 INFO L482 AbstractCegarLoop]: Abstraction has 7879 states and 27849 transitions. [2021-05-22 02:30:48,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 7879 states and 27849 transitions. [2021-05-22 02:30:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:48,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:48,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:48,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-05-22 02:30:48,146 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:48,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:48,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1248661332, now seen corresponding path program 171 times [2021-05-22 02:30:48,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:48,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136217768] [2021-05-22 02:30:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:48,418 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 02:30:48,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:48,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136217768] [2021-05-22 02:30:48,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136217768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:48,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:48,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:30:48,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465872695] [2021-05-22 02:30:48,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:30:48,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:30:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:30:48,420 INFO L87 Difference]: Start difference. First operand 7879 states and 27849 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:53,913 INFO L93 Difference]: Finished difference Result 14617 states and 51563 transitions. [2021-05-22 02:30:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-22 02:30:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:53,941 INFO L225 Difference]: With dead ends: 14617 [2021-05-22 02:30:53,941 INFO L226 Difference]: Without dead ends: 14356 [2021-05-22 02:30:53,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5019 ImplicationChecksByTransitivity, 3270.9ms TimeCoverageRelationStatistics Valid=1131, Invalid=13149, Unknown=0, NotChecked=0, Total=14280 [2021-05-22 02:30:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14356 states. [2021-05-22 02:30:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14356 to 7709. [2021-05-22 02:30:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 7708 states have (on average 3.5377529839128177) internal successors, (27269), 7708 states have internal predecessors, (27269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 27269 transitions. [2021-05-22 02:30:54,118 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 27269 transitions. Word has length 47 [2021-05-22 02:30:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:54,118 INFO L482 AbstractCegarLoop]: Abstraction has 7709 states and 27269 transitions. [2021-05-22 02:30:54,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 27269 transitions. [2021-05-22 02:30:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:54,129 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:54,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:54,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-05-22 02:30:54,129 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1104012510, now seen corresponding path program 172 times [2021-05-22 02:30:54,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:54,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277496042] [2021-05-22 02:30:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:54,409 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 02:30:54,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:54,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277496042] [2021-05-22 02:30:54,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277496042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:54,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:54,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:30:54,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545533564] [2021-05-22 02:30:54,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:30:54,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:30:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:30:54,410 INFO L87 Difference]: Start difference. First operand 7709 states and 27269 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:57,855 INFO L93 Difference]: Finished difference Result 11299 states and 39822 transitions. [2021-05-22 02:30:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-22 02:30:57,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:30:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:57,874 INFO L225 Difference]: With dead ends: 11299 [2021-05-22 02:30:57,874 INFO L226 Difference]: Without dead ends: 11172 [2021-05-22 02:30:57,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 2045.3ms TimeCoverageRelationStatistics Valid=630, Invalid=7202, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:30:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11172 states. [2021-05-22 02:30:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11172 to 7723. [2021-05-22 02:30:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7723 states, 7722 states have (on average 3.5362600362600363) internal successors, (27307), 7722 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7723 states to 7723 states and 27307 transitions. [2021-05-22 02:30:58,044 INFO L78 Accepts]: Start accepts. Automaton has 7723 states and 27307 transitions. Word has length 47 [2021-05-22 02:30:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:58,045 INFO L482 AbstractCegarLoop]: Abstraction has 7723 states and 27307 transitions. [2021-05-22 02:30:58,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7723 states and 27307 transitions. [2021-05-22 02:30:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:30:58,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:58,056 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:58,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-05-22 02:30:58,056 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:58,056 INFO L82 PathProgramCache]: Analyzing trace with hash 320758172, now seen corresponding path program 173 times [2021-05-22 02:30:58,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:58,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851469477] [2021-05-22 02:30:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:58,308 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 02:30:58,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851469477] [2021-05-22 02:30:58,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851469477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:30:58,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:30:58,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:30:58,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619952456] [2021-05-22 02:30:58,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:30:58,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:58,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:30:58,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:30:58,309 INFO L87 Difference]: Start difference. First operand 7723 states and 27307 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:04,250 INFO L93 Difference]: Finished difference Result 14753 states and 52239 transitions. [2021-05-22 02:31:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-22 02:31:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:04,278 INFO L225 Difference]: With dead ends: 14753 [2021-05-22 02:31:04,278 INFO L226 Difference]: Without dead ends: 14664 [2021-05-22 02:31:04,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6414 ImplicationChecksByTransitivity, 3682.5ms TimeCoverageRelationStatistics Valid=1380, Invalid=16442, Unknown=0, NotChecked=0, Total=17822 [2021-05-22 02:31:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14664 states. [2021-05-22 02:31:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14664 to 7739. [2021-05-22 02:31:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7739 states, 7738 states have (on average 3.53489273714138) internal successors, (27353), 7738 states have internal predecessors, (27353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7739 states to 7739 states and 27353 transitions. [2021-05-22 02:31:04,443 INFO L78 Accepts]: Start accepts. Automaton has 7739 states and 27353 transitions. Word has length 47 [2021-05-22 02:31:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:04,443 INFO L482 AbstractCegarLoop]: Abstraction has 7739 states and 27353 transitions. [2021-05-22 02:31:04,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7739 states and 27353 transitions. [2021-05-22 02:31:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:04,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:04,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:04,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-05-22 02:31:04,454 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:04,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash -529893736, now seen corresponding path program 174 times [2021-05-22 02:31:04,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:04,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617564631] [2021-05-22 02:31:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:04,680 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 02:31:04,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:04,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617564631] [2021-05-22 02:31:04,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617564631] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:04,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:04,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:04,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010808533] [2021-05-22 02:31:04,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:04,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:04,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:04,681 INFO L87 Difference]: Start difference. First operand 7739 states and 27353 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:09,839 INFO L93 Difference]: Finished difference Result 14273 states and 50778 transitions. [2021-05-22 02:31:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-22 02:31:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:09,866 INFO L225 Difference]: With dead ends: 14273 [2021-05-22 02:31:09,866 INFO L226 Difference]: Without dead ends: 14170 [2021-05-22 02:31:09,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5061 ImplicationChecksByTransitivity, 3072.5ms TimeCoverageRelationStatistics Valid=1067, Invalid=13453, Unknown=0, NotChecked=0, Total=14520 [2021-05-22 02:31:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14170 states. [2021-05-22 02:31:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14170 to 7719. [2021-05-22 02:31:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7719 states, 7718 states have (on average 3.5373153666753043) internal successors, (27301), 7718 states have internal predecessors, (27301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7719 states to 7719 states and 27301 transitions. [2021-05-22 02:31:10,021 INFO L78 Accepts]: Start accepts. Automaton has 7719 states and 27301 transitions. Word has length 47 [2021-05-22 02:31:10,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:10,021 INFO L482 AbstractCegarLoop]: Abstraction has 7719 states and 27301 transitions. [2021-05-22 02:31:10,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:10,021 INFO L276 IsEmpty]: Start isEmpty. Operand 7719 states and 27301 transitions. [2021-05-22 02:31:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:10,031 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:10,031 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:10,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-22 02:31:10,031 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:10,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1649031428, now seen corresponding path program 175 times [2021-05-22 02:31:10,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:10,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577892529] [2021-05-22 02:31:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:10,262 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 02:31:10,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:10,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577892529] [2021-05-22 02:31:10,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577892529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:10,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:10,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606332869] [2021-05-22 02:31:10,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:10,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:10,263 INFO L87 Difference]: Start difference. First operand 7719 states and 27301 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:13,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:13,131 INFO L93 Difference]: Finished difference Result 10633 states and 37445 transitions. [2021-05-22 02:31:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:31:13,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:13,150 INFO L225 Difference]: With dead ends: 10633 [2021-05-22 02:31:13,150 INFO L226 Difference]: Without dead ends: 10506 [2021-05-22 02:31:13,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1545.6ms TimeCoverageRelationStatistics Valid=463, Invalid=5237, Unknown=0, NotChecked=0, Total=5700 [2021-05-22 02:31:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10506 states. [2021-05-22 02:31:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10506 to 7735. [2021-05-22 02:31:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7735 states, 7734 states have (on average 3.535169381949832) internal successors, (27341), 7734 states have internal predecessors, (27341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7735 states to 7735 states and 27341 transitions. [2021-05-22 02:31:13,281 INFO L78 Accepts]: Start accepts. Automaton has 7735 states and 27341 transitions. Word has length 47 [2021-05-22 02:31:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:13,281 INFO L482 AbstractCegarLoop]: Abstraction has 7735 states and 27341 transitions. [2021-05-22 02:31:13,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7735 states and 27341 transitions. [2021-05-22 02:31:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:13,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:13,291 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:13,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-05-22 02:31:13,291 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash 178339832, now seen corresponding path program 176 times [2021-05-22 02:31:13,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:13,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040855284] [2021-05-22 02:31:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:13,518 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 02:31:13,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:13,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040855284] [2021-05-22 02:31:13,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040855284] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:13,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:13,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:31:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402826546] [2021-05-22 02:31:13,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:31:13,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:13,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:31:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:31:13,519 INFO L87 Difference]: Start difference. First operand 7735 states and 27341 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:15,969 INFO L93 Difference]: Finished difference Result 9833 states and 34722 transitions. [2021-05-22 02:31:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:31:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:15,986 INFO L225 Difference]: With dead ends: 9833 [2021-05-22 02:31:15,987 INFO L226 Difference]: Without dead ends: 9736 [2021-05-22 02:31:15,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1383.2ms TimeCoverageRelationStatistics Valid=425, Invalid=4545, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:31:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9736 states. [2021-05-22 02:31:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9736 to 7741. [2021-05-22 02:31:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 3.5343669250645995) internal successors, (27356), 7740 states have internal predecessors, (27356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 27356 transitions. [2021-05-22 02:31:16,109 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 27356 transitions. Word has length 47 [2021-05-22 02:31:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:16,109 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 27356 transitions. [2021-05-22 02:31:16,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 27356 transitions. [2021-05-22 02:31:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:16,119 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:16,119 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:16,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-05-22 02:31:16,120 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash 181013658, now seen corresponding path program 177 times [2021-05-22 02:31:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:16,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241804323] [2021-05-22 02:31:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:16,360 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 02:31:16,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:16,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241804323] [2021-05-22 02:31:16,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241804323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:16,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:16,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76986757] [2021-05-22 02:31:16,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:16,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:16,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:16,361 INFO L87 Difference]: Start difference. First operand 7741 states and 27356 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:19,384 INFO L93 Difference]: Finished difference Result 10505 states and 37061 transitions. [2021-05-22 02:31:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:31:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:19,403 INFO L225 Difference]: With dead ends: 10505 [2021-05-22 02:31:19,403 INFO L226 Difference]: Without dead ends: 10396 [2021-05-22 02:31:19,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 1752.2ms TimeCoverageRelationStatistics Valid=547, Invalid=6095, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:31:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-05-22 02:31:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 7723. [2021-05-22 02:31:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7723 states, 7722 states have (on average 3.5362600362600363) internal successors, (27307), 7722 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7723 states to 7723 states and 27307 transitions. [2021-05-22 02:31:19,581 INFO L78 Accepts]: Start accepts. Automaton has 7723 states and 27307 transitions. Word has length 47 [2021-05-22 02:31:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:19,582 INFO L482 AbstractCegarLoop]: Abstraction has 7723 states and 27307 transitions. [2021-05-22 02:31:19,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7723 states and 27307 transitions. [2021-05-22 02:31:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:19,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:19,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:19,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-05-22 02:31:19,594 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:19,594 INFO L82 PathProgramCache]: Analyzing trace with hash -559963748, now seen corresponding path program 178 times [2021-05-22 02:31:19,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:19,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060511629] [2021-05-22 02:31:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:19,818 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 02:31:19,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:19,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060511629] [2021-05-22 02:31:19,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060511629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:19,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:19,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:19,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375560284] [2021-05-22 02:31:19,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:19,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:19,819 INFO L87 Difference]: Start difference. First operand 7723 states and 27307 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:24,841 INFO L93 Difference]: Finished difference Result 12486 states and 43792 transitions. [2021-05-22 02:31:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-22 02:31:24,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:24,863 INFO L225 Difference]: With dead ends: 12486 [2021-05-22 02:31:24,863 INFO L226 Difference]: Without dead ends: 12268 [2021-05-22 02:31:24,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5343 ImplicationChecksByTransitivity, 3238.7ms TimeCoverageRelationStatistics Valid=1183, Invalid=14069, Unknown=0, NotChecked=0, Total=15252 [2021-05-22 02:31:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12268 states. [2021-05-22 02:31:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12268 to 8026. [2021-05-22 02:31:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 8025 states have (on average 3.5418068535825546) internal successors, (28423), 8025 states have internal predecessors, (28423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 28423 transitions. [2021-05-22 02:31:25,013 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 28423 transitions. Word has length 47 [2021-05-22 02:31:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:25,013 INFO L482 AbstractCegarLoop]: Abstraction has 8026 states and 28423 transitions. [2021-05-22 02:31:25,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 28423 transitions. [2021-05-22 02:31:25,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:25,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:25,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:25,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-05-22 02:31:25,024 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1011457688, now seen corresponding path program 179 times [2021-05-22 02:31:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:25,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888772732] [2021-05-22 02:31:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:25,246 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 02:31:25,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:25,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888772732] [2021-05-22 02:31:25,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888772732] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:25,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:25,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:25,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867808953] [2021-05-22 02:31:25,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:25,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:25,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:25,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:25,247 INFO L87 Difference]: Start difference. First operand 8026 states and 28423 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:31,183 INFO L93 Difference]: Finished difference Result 14219 states and 50372 transitions. [2021-05-22 02:31:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-22 02:31:31,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:31,209 INFO L225 Difference]: With dead ends: 14219 [2021-05-22 02:31:31,209 INFO L226 Difference]: Without dead ends: 14124 [2021-05-22 02:31:31,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7407 ImplicationChecksByTransitivity, 3659.7ms TimeCoverageRelationStatistics Valid=1427, Invalid=18879, Unknown=0, NotChecked=0, Total=20306 [2021-05-22 02:31:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14124 states. [2021-05-22 02:31:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14124 to 8026. [2021-05-22 02:31:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 8025 states have (on average 3.5418068535825546) internal successors, (28423), 8025 states have internal predecessors, (28423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 28423 transitions. [2021-05-22 02:31:31,366 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 28423 transitions. Word has length 47 [2021-05-22 02:31:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:31,366 INFO L482 AbstractCegarLoop]: Abstraction has 8026 states and 28423 transitions. [2021-05-22 02:31:31,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 28423 transitions. [2021-05-22 02:31:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:31,377 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:31,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:31,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-05-22 02:31:31,377 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1310349366, now seen corresponding path program 180 times [2021-05-22 02:31:31,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:31,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337859637] [2021-05-22 02:31:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:31,588 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 02:31:31,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:31,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337859637] [2021-05-22 02:31:31,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337859637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:31,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:31,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:31:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748539278] [2021-05-22 02:31:31,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:31:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:31:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:31:31,589 INFO L87 Difference]: Start difference. First operand 8026 states and 28423 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:34,915 INFO L93 Difference]: Finished difference Result 11464 states and 40386 transitions. [2021-05-22 02:31:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-22 02:31:34,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:34,935 INFO L225 Difference]: With dead ends: 11464 [2021-05-22 02:31:34,936 INFO L226 Difference]: Without dead ends: 11367 [2021-05-22 02:31:34,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 1990.6ms TimeCoverageRelationStatistics Valid=647, Invalid=7725, Unknown=0, NotChecked=0, Total=8372 [2021-05-22 02:31:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2021-05-22 02:31:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 8034. [2021-05-22 02:31:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8034 states, 8033 states have (on average 3.5405203535416407) internal successors, (28441), 8033 states have internal predecessors, (28441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 28441 transitions. [2021-05-22 02:31:35,078 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 28441 transitions. Word has length 47 [2021-05-22 02:31:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:35,078 INFO L482 AbstractCegarLoop]: Abstraction has 8034 states and 28441 transitions. [2021-05-22 02:31:35,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 28441 transitions. [2021-05-22 02:31:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:35,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:35,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:35,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-05-22 02:31:35,090 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash -415071144, now seen corresponding path program 181 times [2021-05-22 02:31:35,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:35,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746555826] [2021-05-22 02:31:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:35,316 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 02:31:35,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:35,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746555826] [2021-05-22 02:31:35,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746555826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:35,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:35,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:35,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590143204] [2021-05-22 02:31:35,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:35,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:35,317 INFO L87 Difference]: Start difference. First operand 8034 states and 28441 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:39,391 INFO L93 Difference]: Finished difference Result 11873 states and 41988 transitions. [2021-05-22 02:31:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-22 02:31:39,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:39,412 INFO L225 Difference]: With dead ends: 11873 [2021-05-22 02:31:39,412 INFO L226 Difference]: Without dead ends: 11770 [2021-05-22 02:31:39,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 2632.9ms TimeCoverageRelationStatistics Valid=953, Invalid=10603, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 02:31:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11770 states. [2021-05-22 02:31:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11770 to 8022. [2021-05-22 02:31:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 3.5423263932178033) internal successors, (28413), 8021 states have internal predecessors, (28413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 28413 transitions. [2021-05-22 02:31:39,554 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 28413 transitions. Word has length 47 [2021-05-22 02:31:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:39,554 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 28413 transitions. [2021-05-22 02:31:39,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 28413 transitions. [2021-05-22 02:31:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:39,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:39,565 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:39,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-05-22 02:31:39,565 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1655539958, now seen corresponding path program 182 times [2021-05-22 02:31:39,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:39,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419588773] [2021-05-22 02:31:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:39,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:39,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419588773] [2021-05-22 02:31:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419588773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:39,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:39,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:31:39,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799974424] [2021-05-22 02:31:39,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:31:39,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:31:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:31:39,775 INFO L87 Difference]: Start difference. First operand 8022 states and 28413 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:43,869 INFO L93 Difference]: Finished difference Result 11696 states and 41074 transitions. [2021-05-22 02:31:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-22 02:31:43,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:43,890 INFO L225 Difference]: With dead ends: 11696 [2021-05-22 02:31:43,890 INFO L226 Difference]: Without dead ends: 11462 [2021-05-22 02:31:43,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3751 ImplicationChecksByTransitivity, 2535.4ms TimeCoverageRelationStatistics Valid=899, Invalid=10231, Unknown=0, NotChecked=0, Total=11130 [2021-05-22 02:31:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11462 states. [2021-05-22 02:31:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11462 to 8168. [2021-05-22 02:31:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8167 states have (on average 3.5452430513040283) internal successors, (28954), 8167 states have internal predecessors, (28954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 28954 transitions. [2021-05-22 02:31:44,041 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 28954 transitions. Word has length 47 [2021-05-22 02:31:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:44,041 INFO L482 AbstractCegarLoop]: Abstraction has 8168 states and 28954 transitions. [2021-05-22 02:31:44,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 28954 transitions. [2021-05-22 02:31:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:44,053 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:44,053 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:44,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-05-22 02:31:44,053 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash 846599350, now seen corresponding path program 183 times [2021-05-22 02:31:44,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:44,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466661000] [2021-05-22 02:31:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:44,328 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 02:31:44,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:44,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466661000] [2021-05-22 02:31:44,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466661000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:44,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:44,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:44,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444381310] [2021-05-22 02:31:44,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:44,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:44,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:44,329 INFO L87 Difference]: Start difference. First operand 8168 states and 28954 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:48,708 INFO L93 Difference]: Finished difference Result 11561 states and 40520 transitions. [2021-05-22 02:31:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-22 02:31:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:48,730 INFO L225 Difference]: With dead ends: 11561 [2021-05-22 02:31:48,731 INFO L226 Difference]: Without dead ends: 11416 [2021-05-22 02:31:48,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4113 ImplicationChecksByTransitivity, 2663.1ms TimeCoverageRelationStatistics Valid=936, Invalid=11274, Unknown=0, NotChecked=0, Total=12210 [2021-05-22 02:31:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2021-05-22 02:31:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 8168. [2021-05-22 02:31:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8167 states have (on average 3.5445083874127588) internal successors, (28948), 8167 states have internal predecessors, (28948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 28948 transitions. [2021-05-22 02:31:48,891 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 28948 transitions. Word has length 47 [2021-05-22 02:31:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:48,891 INFO L482 AbstractCegarLoop]: Abstraction has 8168 states and 28948 transitions. [2021-05-22 02:31:48,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 28948 transitions. [2021-05-22 02:31:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:48,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:48,903 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:48,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-05-22 02:31:48,903 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1746495128, now seen corresponding path program 184 times [2021-05-22 02:31:48,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:48,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288233976] [2021-05-22 02:31:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:49,131 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 02:31:49,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:49,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288233976] [2021-05-22 02:31:49,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288233976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:49,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:49,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:49,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461213933] [2021-05-22 02:31:49,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:49,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:49,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:49,132 INFO L87 Difference]: Start difference. First operand 8168 states and 28948 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:56,491 INFO L93 Difference]: Finished difference Result 17145 states and 60671 transitions. [2021-05-22 02:31:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-22 02:31:56,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:31:56,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:56,519 INFO L225 Difference]: With dead ends: 17145 [2021-05-22 02:31:56,519 INFO L226 Difference]: Without dead ends: 16701 [2021-05-22 02:31:56,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9514 ImplicationChecksByTransitivity, 4564.1ms TimeCoverageRelationStatistics Valid=1677, Invalid=23445, Unknown=0, NotChecked=0, Total=25122 [2021-05-22 02:31:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16701 states. [2021-05-22 02:31:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16701 to 8664. [2021-05-22 02:31:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8664 states, 8663 states have (on average 3.558582477201893) internal successors, (30828), 8663 states have internal predecessors, (30828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8664 states to 8664 states and 30828 transitions. [2021-05-22 02:31:56,699 INFO L78 Accepts]: Start accepts. Automaton has 8664 states and 30828 transitions. Word has length 47 [2021-05-22 02:31:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:56,699 INFO L482 AbstractCegarLoop]: Abstraction has 8664 states and 30828 transitions. [2021-05-22 02:31:56,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8664 states and 30828 transitions. [2021-05-22 02:31:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:31:56,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:56,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:56,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-05-22 02:31:56,711 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash 895843220, now seen corresponding path program 185 times [2021-05-22 02:31:56,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:56,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070958211] [2021-05-22 02:31:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:56,928 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 02:31:56,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:56,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070958211] [2021-05-22 02:31:56,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070958211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:31:56,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:31:56,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:31:56,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710104807] [2021-05-22 02:31:56,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:31:56,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:31:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:31:56,929 INFO L87 Difference]: Start difference. First operand 8664 states and 30828 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:03,884 INFO L93 Difference]: Finished difference Result 16952 states and 60088 transitions. [2021-05-22 02:32:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-05-22 02:32:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:03,917 INFO L225 Difference]: With dead ends: 16952 [2021-05-22 02:32:03,917 INFO L226 Difference]: Without dead ends: 16744 [2021-05-22 02:32:03,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8466 ImplicationChecksByTransitivity, 4192.7ms TimeCoverageRelationStatistics Valid=1544, Invalid=21106, Unknown=0, NotChecked=0, Total=22650 [2021-05-22 02:32:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16744 states. [2021-05-22 02:32:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16744 to 8619. [2021-05-22 02:32:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8619 states, 8618 states have (on average 3.561615223949872) internal successors, (30694), 8618 states have internal predecessors, (30694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8619 states to 8619 states and 30694 transitions. [2021-05-22 02:32:04,104 INFO L78 Accepts]: Start accepts. Automaton has 8619 states and 30694 transitions. Word has length 47 [2021-05-22 02:32:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:04,104 INFO L482 AbstractCegarLoop]: Abstraction has 8619 states and 30694 transitions. [2021-05-22 02:32:04,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8619 states and 30694 transitions. [2021-05-22 02:32:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:04,116 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:04,116 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:04,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-05-22 02:32:04,117 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:04,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1718522630, now seen corresponding path program 186 times [2021-05-22 02:32:04,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:04,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193104083] [2021-05-22 02:32:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:04,337 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 02:32:04,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:04,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193104083] [2021-05-22 02:32:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193104083] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:04,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:04,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555548008] [2021-05-22 02:32:04,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:04,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:04,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:04,338 INFO L87 Difference]: Start difference. First operand 8619 states and 30694 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:09,539 INFO L93 Difference]: Finished difference Result 13187 states and 46449 transitions. [2021-05-22 02:32:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-22 02:32:09,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:09,563 INFO L225 Difference]: With dead ends: 13187 [2021-05-22 02:32:09,563 INFO L226 Difference]: Without dead ends: 13066 [2021-05-22 02:32:09,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 3366.2ms TimeCoverageRelationStatistics Valid=1222, Invalid=14780, Unknown=0, NotChecked=0, Total=16002 [2021-05-22 02:32:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2021-05-22 02:32:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 8619. [2021-05-22 02:32:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8619 states, 8618 states have (on average 3.561615223949872) internal successors, (30694), 8618 states have internal predecessors, (30694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8619 states to 8619 states and 30694 transitions. [2021-05-22 02:32:09,764 INFO L78 Accepts]: Start accepts. Automaton has 8619 states and 30694 transitions. Word has length 47 [2021-05-22 02:32:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:09,764 INFO L482 AbstractCegarLoop]: Abstraction has 8619 states and 30694 transitions. [2021-05-22 02:32:09,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 8619 states and 30694 transitions. [2021-05-22 02:32:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:09,776 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:09,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:09,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-05-22 02:32:09,777 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash -147101194, now seen corresponding path program 187 times [2021-05-22 02:32:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:09,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736761050] [2021-05-22 02:32:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:09,996 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 02:32:09,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:09,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736761050] [2021-05-22 02:32:09,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736761050] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:09,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:09,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:09,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964311940] [2021-05-22 02:32:09,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:09,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:09,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:09,997 INFO L87 Difference]: Start difference. First operand 8619 states and 30694 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:16,224 INFO L93 Difference]: Finished difference Result 16101 states and 57229 transitions. [2021-05-22 02:32:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-22 02:32:16,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:16,255 INFO L225 Difference]: With dead ends: 16101 [2021-05-22 02:32:16,256 INFO L226 Difference]: Without dead ends: 15857 [2021-05-22 02:32:16,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7709 ImplicationChecksByTransitivity, 3789.9ms TimeCoverageRelationStatistics Valid=1488, Invalid=19392, Unknown=0, NotChecked=0, Total=20880 [2021-05-22 02:32:16,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15857 states. [2021-05-22 02:32:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15857 to 8790. [2021-05-22 02:32:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8790 states, 8789 states have (on average 3.567300034133576) internal successors, (31353), 8789 states have internal predecessors, (31353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8790 states to 8790 states and 31353 transitions. [2021-05-22 02:32:16,451 INFO L78 Accepts]: Start accepts. Automaton has 8790 states and 31353 transitions. Word has length 47 [2021-05-22 02:32:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:16,451 INFO L482 AbstractCegarLoop]: Abstraction has 8790 states and 31353 transitions. [2021-05-22 02:32:16,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 8790 states and 31353 transitions. [2021-05-22 02:32:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:16,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:16,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:16,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-05-22 02:32:16,521 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash 151790484, now seen corresponding path program 188 times [2021-05-22 02:32:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:16,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713293648] [2021-05-22 02:32:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:16,735 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 02:32:16,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:16,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713293648] [2021-05-22 02:32:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713293648] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:16,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:16,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:32:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447052044] [2021-05-22 02:32:16,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:32:16,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:16,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:32:16,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:32:16,735 INFO L87 Difference]: Start difference. First operand 8790 states and 31353 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:20,774 INFO L93 Difference]: Finished difference Result 13159 states and 46549 transitions. [2021-05-22 02:32:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-22 02:32:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:20,798 INFO L225 Difference]: With dead ends: 13159 [2021-05-22 02:32:20,798 INFO L226 Difference]: Without dead ends: 13062 [2021-05-22 02:32:20,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3490 ImplicationChecksByTransitivity, 2439.3ms TimeCoverageRelationStatistics Valid=883, Invalid=9623, Unknown=0, NotChecked=0, Total=10506 [2021-05-22 02:32:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13062 states. [2021-05-22 02:32:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13062 to 8804. [2021-05-22 02:32:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8804 states, 8803 states have (on average 3.564693854367829) internal successors, (31380), 8803 states have internal predecessors, (31380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8804 states to 8804 states and 31380 transitions. [2021-05-22 02:32:20,957 INFO L78 Accepts]: Start accepts. Automaton has 8804 states and 31380 transitions. Word has length 47 [2021-05-22 02:32:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:20,957 INFO L482 AbstractCegarLoop]: Abstraction has 8804 states and 31380 transitions. [2021-05-22 02:32:20,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:20,957 INFO L276 IsEmpty]: Start isEmpty. Operand 8804 states and 31380 transitions. [2021-05-22 02:32:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:20,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:20,970 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:20,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-05-22 02:32:20,970 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1573630026, now seen corresponding path program 189 times [2021-05-22 02:32:20,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:20,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087449504] [2021-05-22 02:32:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:21,237 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 02:32:21,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087449504] [2021-05-22 02:32:21,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087449504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:21,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:21,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:21,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86411551] [2021-05-22 02:32:21,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:21,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:21,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:21,238 INFO L87 Difference]: Start difference. First operand 8804 states and 31380 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:25,660 INFO L93 Difference]: Finished difference Result 13458 states and 47653 transitions. [2021-05-22 02:32:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-22 02:32:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:25,686 INFO L225 Difference]: With dead ends: 13458 [2021-05-22 02:32:25,686 INFO L226 Difference]: Without dead ends: 13341 [2021-05-22 02:32:25,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 2720.7ms TimeCoverageRelationStatistics Valid=983, Invalid=11007, Unknown=0, NotChecked=0, Total=11990 [2021-05-22 02:32:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-05-22 02:32:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 8778. [2021-05-22 02:32:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8778 states, 8777 states have (on average 3.567847783980859) internal successors, (31315), 8777 states have internal predecessors, (31315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8778 states to 8778 states and 31315 transitions. [2021-05-22 02:32:25,852 INFO L78 Accepts]: Start accepts. Automaton has 8778 states and 31315 transitions. Word has length 47 [2021-05-22 02:32:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:25,852 INFO L482 AbstractCegarLoop]: Abstraction has 8778 states and 31315 transitions. [2021-05-22 02:32:25,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8778 states and 31315 transitions. [2021-05-22 02:32:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:25,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:25,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:25,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-05-22 02:32:25,865 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1066695164, now seen corresponding path program 190 times [2021-05-22 02:32:25,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:25,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136024025] [2021-05-22 02:32:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:26,084 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 02:32:26,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:26,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136024025] [2021-05-22 02:32:26,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136024025] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:26,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:26,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2836120] [2021-05-22 02:32:26,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:26,085 INFO L87 Difference]: Start difference. First operand 8778 states and 31315 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:29,366 INFO L93 Difference]: Finished difference Result 13381 states and 47217 transitions. [2021-05-22 02:32:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:32:29,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:29,393 INFO L225 Difference]: With dead ends: 13381 [2021-05-22 02:32:29,393 INFO L226 Difference]: Without dead ends: 13254 [2021-05-22 02:32:29,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1792.9ms TimeCoverageRelationStatistics Valid=572, Invalid=6400, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:32:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13254 states. [2021-05-22 02:32:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13254 to 8810. [2021-05-22 02:32:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8810 states, 8809 states have (on average 3.5655579520944487) internal successors, (31409), 8809 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8810 states to 8810 states and 31409 transitions. [2021-05-22 02:32:29,564 INFO L78 Accepts]: Start accepts. Automaton has 8810 states and 31409 transitions. Word has length 47 [2021-05-22 02:32:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:29,564 INFO L482 AbstractCegarLoop]: Abstraction has 8810 states and 31409 transitions. [2021-05-22 02:32:29,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 8810 states and 31409 transitions. [2021-05-22 02:32:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:29,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:29,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:29,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-05-22 02:32:29,576 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:29,576 INFO L82 PathProgramCache]: Analyzing trace with hash -304502242, now seen corresponding path program 191 times [2021-05-22 02:32:29,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:29,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386678489] [2021-05-22 02:32:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:29,798 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 02:32:29,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386678489] [2021-05-22 02:32:29,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386678489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:29,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:29,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:29,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466258410] [2021-05-22 02:32:29,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:29,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:29,799 INFO L87 Difference]: Start difference. First operand 8810 states and 31409 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:32,923 INFO L93 Difference]: Finished difference Result 13062 states and 46105 transitions. [2021-05-22 02:32:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:32:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:32,947 INFO L225 Difference]: With dead ends: 13062 [2021-05-22 02:32:32,947 INFO L226 Difference]: Without dead ends: 12962 [2021-05-22 02:32:32,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1794.6ms TimeCoverageRelationStatistics Valid=557, Invalid=5923, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:32:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2021-05-22 02:32:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 8837. [2021-05-22 02:32:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 8836 states have (on average 3.562132186509733) internal successors, (31475), 8836 states have internal predecessors, (31475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 31475 transitions. [2021-05-22 02:32:33,106 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 31475 transitions. Word has length 47 [2021-05-22 02:32:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:33,106 INFO L482 AbstractCegarLoop]: Abstraction has 8837 states and 31475 transitions. [2021-05-22 02:32:33,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 31475 transitions. [2021-05-22 02:32:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:33,117 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:33,117 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:33,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-05-22 02:32:33,118 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:33,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1739569732, now seen corresponding path program 192 times [2021-05-22 02:32:33,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:33,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135037318] [2021-05-22 02:32:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:33,344 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 02:32:33,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:33,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135037318] [2021-05-22 02:32:33,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135037318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:33,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:33,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:33,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106726988] [2021-05-22 02:32:33,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:33,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:33,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:33,345 INFO L87 Difference]: Start difference. First operand 8837 states and 31475 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:36,801 INFO L93 Difference]: Finished difference Result 13918 states and 49230 transitions. [2021-05-22 02:32:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-22 02:32:36,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:36,828 INFO L225 Difference]: With dead ends: 13918 [2021-05-22 02:32:36,828 INFO L226 Difference]: Without dead ends: 13800 [2021-05-22 02:32:36,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 1959.1ms TimeCoverageRelationStatistics Valid=652, Invalid=7538, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:32:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13800 states. [2021-05-22 02:32:36,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13800 to 8810. [2021-05-22 02:32:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8810 states, 8809 states have (on average 3.565103871040981) internal successors, (31405), 8809 states have internal predecessors, (31405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8810 states to 8810 states and 31405 transitions. [2021-05-22 02:32:36,992 INFO L78 Accepts]: Start accepts. Automaton has 8810 states and 31405 transitions. Word has length 47 [2021-05-22 02:32:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:36,993 INFO L482 AbstractCegarLoop]: Abstraction has 8810 states and 31405 transitions. [2021-05-22 02:32:36,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8810 states and 31405 transitions. [2021-05-22 02:32:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:37,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:37,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:37,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-05-22 02:32:37,005 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:37,006 INFO L82 PathProgramCache]: Analyzing trace with hash -614209124, now seen corresponding path program 193 times [2021-05-22 02:32:37,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:37,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931339108] [2021-05-22 02:32:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:37,230 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 02:32:37,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931339108] [2021-05-22 02:32:37,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931339108] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:37,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:37,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:37,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020202057] [2021-05-22 02:32:37,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:37,231 INFO L87 Difference]: Start difference. First operand 8810 states and 31405 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:40,886 INFO L93 Difference]: Finished difference Result 13889 states and 49051 transitions. [2021-05-22 02:32:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-22 02:32:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:40,911 INFO L225 Difference]: With dead ends: 13889 [2021-05-22 02:32:40,911 INFO L226 Difference]: Without dead ends: 13800 [2021-05-22 02:32:40,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 2196.6ms TimeCoverageRelationStatistics Valid=704, Invalid=8038, Unknown=0, NotChecked=0, Total=8742 [2021-05-22 02:32:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13800 states. [2021-05-22 02:32:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13800 to 8818. [2021-05-22 02:32:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8818 states, 8817 states have (on average 3.564137461721674) internal successors, (31425), 8817 states have internal predecessors, (31425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8818 states to 8818 states and 31425 transitions. [2021-05-22 02:32:41,115 INFO L78 Accepts]: Start accepts. Automaton has 8818 states and 31425 transitions. Word has length 47 [2021-05-22 02:32:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:41,116 INFO L482 AbstractCegarLoop]: Abstraction has 8818 states and 31425 transitions. [2021-05-22 02:32:41,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 8818 states and 31425 transitions. [2021-05-22 02:32:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:41,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:41,128 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:41,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-05-22 02:32:41,128 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1136141924, now seen corresponding path program 194 times [2021-05-22 02:32:41,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:41,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445759792] [2021-05-22 02:32:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:41,349 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 02:32:41,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:41,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445759792] [2021-05-22 02:32:41,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445759792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:41,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:41,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:41,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674672606] [2021-05-22 02:32:41,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:41,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:41,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:41,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:41,350 INFO L87 Difference]: Start difference. First operand 8818 states and 31425 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:44,402 INFO L93 Difference]: Finished difference Result 13367 states and 47168 transitions. [2021-05-22 02:32:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:32:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:44,427 INFO L225 Difference]: With dead ends: 13367 [2021-05-22 02:32:44,427 INFO L226 Difference]: Without dead ends: 13261 [2021-05-22 02:32:44,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 1821.9ms TimeCoverageRelationStatistics Valid=584, Invalid=5896, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:32:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13261 states. [2021-05-22 02:32:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13261 to 8812. [2021-05-22 02:32:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8812 states, 8811 states have (on average 3.564635115196913) internal successors, (31408), 8811 states have internal predecessors, (31408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8812 states to 8812 states and 31408 transitions. [2021-05-22 02:32:44,634 INFO L78 Accepts]: Start accepts. Automaton has 8812 states and 31408 transitions. Word has length 47 [2021-05-22 02:32:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:44,635 INFO L482 AbstractCegarLoop]: Abstraction has 8812 states and 31408 transitions. [2021-05-22 02:32:44,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8812 states and 31408 transitions. [2021-05-22 02:32:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:44,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:44,647 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:44,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-05-22 02:32:44,647 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1064028982, now seen corresponding path program 195 times [2021-05-22 02:32:44,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:44,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701185644] [2021-05-22 02:32:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:44,912 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 02:32:44,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701185644] [2021-05-22 02:32:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701185644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:44,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:44,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:44,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511255277] [2021-05-22 02:32:44,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:44,913 INFO L87 Difference]: Start difference. First operand 8812 states and 31408 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:48,197 INFO L93 Difference]: Finished difference Result 13612 states and 48120 transitions. [2021-05-22 02:32:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:32:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:48,224 INFO L225 Difference]: With dead ends: 13612 [2021-05-22 02:32:48,224 INFO L226 Difference]: Without dead ends: 13512 [2021-05-22 02:32:48,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 1976.0ms TimeCoverageRelationStatistics Valid=635, Invalid=6675, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:32:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-05-22 02:32:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 8821. [2021-05-22 02:32:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 8820 states have (on average 3.5634920634920637) internal successors, (31430), 8820 states have internal predecessors, (31430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 31430 transitions. [2021-05-22 02:32:48,390 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 31430 transitions. Word has length 47 [2021-05-22 02:32:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:48,390 INFO L482 AbstractCegarLoop]: Abstraction has 8821 states and 31430 transitions. [2021-05-22 02:32:48,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 31430 transitions. [2021-05-22 02:32:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:48,403 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:48,403 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:48,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-05-22 02:32:48,404 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash 997966424, now seen corresponding path program 196 times [2021-05-22 02:32:48,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:48,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753505696] [2021-05-22 02:32:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:48,626 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 02:32:48,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:48,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753505696] [2021-05-22 02:32:48,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753505696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:48,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:48,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:48,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57291034] [2021-05-22 02:32:48,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:48,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:48,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:48,627 INFO L87 Difference]: Start difference. First operand 8821 states and 31430 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:52,259 INFO L93 Difference]: Finished difference Result 14468 states and 51245 transitions. [2021-05-22 02:32:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-22 02:32:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:52,287 INFO L225 Difference]: With dead ends: 14468 [2021-05-22 02:32:52,287 INFO L226 Difference]: Without dead ends: 14362 [2021-05-22 02:32:52,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2884 ImplicationChecksByTransitivity, 2150.2ms TimeCoverageRelationStatistics Valid=724, Invalid=8396, Unknown=0, NotChecked=0, Total=9120 [2021-05-22 02:32:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-05-22 02:32:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 8806. [2021-05-22 02:32:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8806 states, 8805 states have (on average 3.565587734241908) internal successors, (31395), 8805 states have internal predecessors, (31395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8806 states to 8806 states and 31395 transitions. [2021-05-22 02:32:52,461 INFO L78 Accepts]: Start accepts. Automaton has 8806 states and 31395 transitions. Word has length 47 [2021-05-22 02:32:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:52,461 INFO L482 AbstractCegarLoop]: Abstraction has 8806 states and 31395 transitions. [2021-05-22 02:32:52,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8806 states and 31395 transitions. [2021-05-22 02:32:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:52,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:52,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:52,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-05-22 02:32:52,474 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:52,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2094935804, now seen corresponding path program 197 times [2021-05-22 02:32:52,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:52,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769501679] [2021-05-22 02:32:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:52,699 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 02:32:52,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769501679] [2021-05-22 02:32:52,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769501679] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:52,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:52,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:52,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5221321] [2021-05-22 02:32:52,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:52,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:52,700 INFO L87 Difference]: Start difference. First operand 8806 states and 31395 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:55,907 INFO L93 Difference]: Finished difference Result 12311 states and 43489 transitions. [2021-05-22 02:32:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 02:32:55,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:55,929 INFO L225 Difference]: With dead ends: 12311 [2021-05-22 02:32:55,929 INFO L226 Difference]: Without dead ends: 12184 [2021-05-22 02:32:55,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 1779.3ms TimeCoverageRelationStatistics Valid=586, Invalid=6386, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:32:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12184 states. [2021-05-22 02:32:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12184 to 8828. [2021-05-22 02:32:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8828 states, 8827 states have (on average 3.563951512405121) internal successors, (31459), 8827 states have internal predecessors, (31459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8828 states to 8828 states and 31459 transitions. [2021-05-22 02:32:56,089 INFO L78 Accepts]: Start accepts. Automaton has 8828 states and 31459 transitions. Word has length 47 [2021-05-22 02:32:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:56,089 INFO L482 AbstractCegarLoop]: Abstraction has 8828 states and 31459 transitions. [2021-05-22 02:32:56,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8828 states and 31459 transitions. [2021-05-22 02:32:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:56,102 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:56,102 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:56,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-05-22 02:32:56,102 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:56,102 INFO L82 PathProgramCache]: Analyzing trace with hash -372660232, now seen corresponding path program 198 times [2021-05-22 02:32:56,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:56,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476490539] [2021-05-22 02:32:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:56,331 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 02:32:56,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:56,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476490539] [2021-05-22 02:32:56,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476490539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:56,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:56,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47740861] [2021-05-22 02:32:56,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:56,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:56,332 INFO L87 Difference]: Start difference. First operand 8828 states and 31459 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:59,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:59,363 INFO L93 Difference]: Finished difference Result 11360 states and 40284 transitions. [2021-05-22 02:32:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-22 02:32:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:32:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:59,383 INFO L225 Difference]: With dead ends: 11360 [2021-05-22 02:32:59,383 INFO L226 Difference]: Without dead ends: 11263 [2021-05-22 02:32:59,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1846.3ms TimeCoverageRelationStatistics Valid=585, Invalid=6387, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:32:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11263 states. [2021-05-22 02:32:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11263 to 8846. [2021-05-22 02:32:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8846 states, 8845 states have (on average 3.5617863199547766) internal successors, (31504), 8845 states have internal predecessors, (31504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8846 states to 8846 states and 31504 transitions. [2021-05-22 02:32:59,527 INFO L78 Accepts]: Start accepts. Automaton has 8846 states and 31504 transitions. Word has length 47 [2021-05-22 02:32:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:59,528 INFO L482 AbstractCegarLoop]: Abstraction has 8846 states and 31504 transitions. [2021-05-22 02:32:59,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 8846 states and 31504 transitions. [2021-05-22 02:32:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:32:59,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:59,540 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:59,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-05-22 02:32:59,540 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:59,540 INFO L82 PathProgramCache]: Analyzing trace with hash -369986406, now seen corresponding path program 199 times [2021-05-22 02:32:59,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:59,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660652338] [2021-05-22 02:32:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:59,763 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 02:32:59,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:59,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660652338] [2021-05-22 02:32:59,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660652338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:32:59,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:32:59,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:32:59,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286243355] [2021-05-22 02:32:59,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:32:59,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:59,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:32:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:32:59,764 INFO L87 Difference]: Start difference. First operand 8846 states and 31504 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:03,014 INFO L93 Difference]: Finished difference Result 12189 states and 43128 transitions. [2021-05-22 02:33:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:33:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:03,036 INFO L225 Difference]: With dead ends: 12189 [2021-05-22 02:33:03,036 INFO L226 Difference]: Without dead ends: 12080 [2021-05-22 02:33:03,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 1924.1ms TimeCoverageRelationStatistics Valid=648, Invalid=7184, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:33:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-05-22 02:33:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8828. [2021-05-22 02:33:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8828 states, 8827 states have (on average 3.5634983573127905) internal successors, (31455), 8827 states have internal predecessors, (31455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8828 states to 8828 states and 31455 transitions. [2021-05-22 02:33:03,191 INFO L78 Accepts]: Start accepts. Automaton has 8828 states and 31455 transitions. Word has length 47 [2021-05-22 02:33:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:03,191 INFO L482 AbstractCegarLoop]: Abstraction has 8828 states and 31455 transitions. [2021-05-22 02:33:03,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 8828 states and 31455 transitions. [2021-05-22 02:33:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:03,203 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:03,203 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:03,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-05-22 02:33:03,204 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:03,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:03,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1110963812, now seen corresponding path program 200 times [2021-05-22 02:33:03,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:03,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909314848] [2021-05-22 02:33:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:03,420 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 02:33:03,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:03,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909314848] [2021-05-22 02:33:03,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909314848] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:03,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:03,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:03,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413274433] [2021-05-22 02:33:03,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:03,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:03,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:03,421 INFO L87 Difference]: Start difference. First operand 8828 states and 31455 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:08,686 INFO L93 Difference]: Finished difference Result 13768 states and 48693 transitions. [2021-05-22 02:33:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-22 02:33:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:08,712 INFO L225 Difference]: With dead ends: 13768 [2021-05-22 02:33:08,712 INFO L226 Difference]: Without dead ends: 13647 [2021-05-22 02:33:08,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5965 ImplicationChecksByTransitivity, 3384.5ms TimeCoverageRelationStatistics Valid=1266, Invalid=15504, Unknown=0, NotChecked=0, Total=16770 [2021-05-22 02:33:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13647 states. [2021-05-22 02:33:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13647 to 8828. [2021-05-22 02:33:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8828 states, 8827 states have (on average 3.5634983573127905) internal successors, (31455), 8827 states have internal predecessors, (31455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8828 states to 8828 states and 31455 transitions. [2021-05-22 02:33:08,922 INFO L78 Accepts]: Start accepts. Automaton has 8828 states and 31455 transitions. Word has length 47 [2021-05-22 02:33:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:08,922 INFO L482 AbstractCegarLoop]: Abstraction has 8828 states and 31455 transitions. [2021-05-22 02:33:08,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8828 states and 31455 transitions. [2021-05-22 02:33:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:08,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:08,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:08,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-05-22 02:33:08,935 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash 460457624, now seen corresponding path program 201 times [2021-05-22 02:33:08,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:08,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413776151] [2021-05-22 02:33:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:09,155 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 02:33:09,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:09,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413776151] [2021-05-22 02:33:09,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413776151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:09,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:09,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:09,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139291419] [2021-05-22 02:33:09,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:09,156 INFO L87 Difference]: Start difference. First operand 8828 states and 31455 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:15,685 INFO L93 Difference]: Finished difference Result 16125 states and 57332 transitions. [2021-05-22 02:33:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-05-22 02:33:15,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:15,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:15,716 INFO L225 Difference]: With dead ends: 16125 [2021-05-22 02:33:15,716 INFO L226 Difference]: Without dead ends: 15933 [2021-05-22 02:33:15,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8957 ImplicationChecksByTransitivity, 4124.1ms TimeCoverageRelationStatistics Valid=1602, Invalid=22268, Unknown=0, NotChecked=0, Total=23870 [2021-05-22 02:33:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15933 states. [2021-05-22 02:33:15,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15933 to 8837. [2021-05-22 02:33:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 8836 states have (on average 3.5639429606156634) internal successors, (31491), 8836 states have internal predecessors, (31491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 31491 transitions. [2021-05-22 02:33:15,957 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 31491 transitions. Word has length 47 [2021-05-22 02:33:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:15,957 INFO L482 AbstractCegarLoop]: Abstraction has 8837 states and 31491 transitions. [2021-05-22 02:33:15,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 31491 transitions. [2021-05-22 02:33:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:15,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:15,969 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:15,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-05-22 02:33:15,969 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash 759349302, now seen corresponding path program 202 times [2021-05-22 02:33:15,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:15,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605132136] [2021-05-22 02:33:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:16,187 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 02:33:16,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605132136] [2021-05-22 02:33:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605132136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:16,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:16,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:16,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672235174] [2021-05-22 02:33:16,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:16,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:16,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:16,188 INFO L87 Difference]: Start difference. First operand 8837 states and 31491 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:20,260 INFO L93 Difference]: Finished difference Result 12966 states and 45709 transitions. [2021-05-22 02:33:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-22 02:33:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:20,286 INFO L225 Difference]: With dead ends: 12966 [2021-05-22 02:33:20,286 INFO L226 Difference]: Without dead ends: 12869 [2021-05-22 02:33:20,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 2519.6ms TimeCoverageRelationStatistics Valid=847, Invalid=10283, Unknown=0, NotChecked=0, Total=11130 [2021-05-22 02:33:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12869 states. [2021-05-22 02:33:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12869 to 8845. [2021-05-22 02:33:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8845 states, 8844 states have (on average 3.5627544097693353) internal successors, (31509), 8844 states have internal predecessors, (31509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 31509 transitions. [2021-05-22 02:33:20,448 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 31509 transitions. Word has length 47 [2021-05-22 02:33:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:20,449 INFO L482 AbstractCegarLoop]: Abstraction has 8845 states and 31509 transitions. [2021-05-22 02:33:20,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 31509 transitions. [2021-05-22 02:33:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:20,461 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:20,461 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:20,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-05-22 02:33:20,461 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:20,461 INFO L82 PathProgramCache]: Analyzing trace with hash -966071208, now seen corresponding path program 203 times [2021-05-22 02:33:20,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:20,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154321887] [2021-05-22 02:33:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:20,681 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 02:33:20,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154321887] [2021-05-22 02:33:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154321887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:20,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:20,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:20,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662525414] [2021-05-22 02:33:20,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:20,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:20,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:20,682 INFO L87 Difference]: Start difference. First operand 8845 states and 31509 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:25,124 INFO L93 Difference]: Finished difference Result 13193 states and 46752 transitions. [2021-05-22 02:33:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-22 02:33:25,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:25,149 INFO L225 Difference]: With dead ends: 13193 [2021-05-22 02:33:25,149 INFO L226 Difference]: Without dead ends: 13090 [2021-05-22 02:33:25,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 2870.4ms TimeCoverageRelationStatistics Valid=1091, Invalid=12481, Unknown=0, NotChecked=0, Total=13572 [2021-05-22 02:33:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13090 states. [2021-05-22 02:33:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13090 to 8833. [2021-05-22 02:33:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 8832 states have (on average 3.564651268115942) internal successors, (31483), 8832 states have internal predecessors, (31483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 31483 transitions. [2021-05-22 02:33:25,311 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 31483 transitions. Word has length 47 [2021-05-22 02:33:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:25,312 INFO L482 AbstractCegarLoop]: Abstraction has 8833 states and 31483 transitions. [2021-05-22 02:33:25,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 31483 transitions. [2021-05-22 02:33:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:25,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:25,324 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:25,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-05-22 02:33:25,324 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:25,324 INFO L82 PathProgramCache]: Analyzing trace with hash -279872324, now seen corresponding path program 204 times [2021-05-22 02:33:25,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:25,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877228824] [2021-05-22 02:33:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:25,542 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 02:33:25,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:25,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877228824] [2021-05-22 02:33:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877228824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:25,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:25,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:25,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190997607] [2021-05-22 02:33:25,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:25,543 INFO L87 Difference]: Start difference. First operand 8833 states and 31483 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:28,763 INFO L93 Difference]: Finished difference Result 12744 states and 45096 transitions. [2021-05-22 02:33:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:33:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:28,787 INFO L225 Difference]: With dead ends: 12744 [2021-05-22 02:33:28,787 INFO L226 Difference]: Without dead ends: 12644 [2021-05-22 02:33:28,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 1772.4ms TimeCoverageRelationStatistics Valid=534, Invalid=5786, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:33:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12644 states. [2021-05-22 02:33:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12644 to 8842. [2021-05-22 02:33:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8842 states, 8841 states have (on average 3.563510915054858) internal successors, (31505), 8841 states have internal predecessors, (31505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 31505 transitions. [2021-05-22 02:33:28,949 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 31505 transitions. Word has length 47 [2021-05-22 02:33:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:28,950 INFO L482 AbstractCegarLoop]: Abstraction has 8842 states and 31505 transitions. [2021-05-22 02:33:28,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 31505 transitions. [2021-05-22 02:33:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:28,962 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:28,962 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:28,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-05-22 02:33:28,962 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1714939814, now seen corresponding path program 205 times [2021-05-22 02:33:28,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:28,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925819991] [2021-05-22 02:33:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:29,177 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 02:33:29,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:29,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925819991] [2021-05-22 02:33:29,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925819991] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:29,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:29,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:29,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443426934] [2021-05-22 02:33:29,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:29,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:29,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:29,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:29,178 INFO L87 Difference]: Start difference. First operand 8842 states and 31505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:31,903 INFO L93 Difference]: Finished difference Result 11532 states and 40861 transitions. [2021-05-22 02:33:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:33:31,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:31,923 INFO L225 Difference]: With dead ends: 11532 [2021-05-22 02:33:31,924 INFO L226 Difference]: Without dead ends: 11414 [2021-05-22 02:33:31,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1497.4ms TimeCoverageRelationStatistics Valid=482, Invalid=5068, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:33:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11414 states. [2021-05-22 02:33:32,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11414 to 8842. [2021-05-22 02:33:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8842 states, 8841 states have (on average 3.5628322587942542) internal successors, (31499), 8841 states have internal predecessors, (31499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 31499 transitions. [2021-05-22 02:33:32,069 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 31499 transitions. Word has length 47 [2021-05-22 02:33:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:32,069 INFO L482 AbstractCegarLoop]: Abstraction has 8842 states and 31499 transitions. [2021-05-22 02:33:32,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 31499 transitions. [2021-05-22 02:33:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:32,081 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:32,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:32,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-05-22 02:33:32,082 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash 771909014, now seen corresponding path program 206 times [2021-05-22 02:33:32,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:32,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774892188] [2021-05-22 02:33:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:32,299 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 02:33:32,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:32,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774892188] [2021-05-22 02:33:32,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774892188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:32,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:32,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:32,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573979964] [2021-05-22 02:33:32,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:32,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:32,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:32,300 INFO L87 Difference]: Start difference. First operand 8842 states and 31499 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:35,322 INFO L93 Difference]: Finished difference Result 11390 states and 40435 transitions. [2021-05-22 02:33:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:33:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:35,343 INFO L225 Difference]: With dead ends: 11390 [2021-05-22 02:33:35,343 INFO L226 Difference]: Without dead ends: 11293 [2021-05-22 02:33:35,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 1732.0ms TimeCoverageRelationStatistics Valid=543, Invalid=5937, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:33:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11293 states. [2021-05-22 02:33:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11293 to 8848. [2021-05-22 02:33:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8848 states, 8847 states have (on average 3.5621114502091102) internal successors, (31514), 8847 states have internal predecessors, (31514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 31514 transitions. [2021-05-22 02:33:35,502 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 31514 transitions. Word has length 47 [2021-05-22 02:33:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:35,502 INFO L482 AbstractCegarLoop]: Abstraction has 8848 states and 31514 transitions. [2021-05-22 02:33:35,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 31514 transitions. [2021-05-22 02:33:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:35,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:35,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:35,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-05-22 02:33:35,516 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash 774582840, now seen corresponding path program 207 times [2021-05-22 02:33:35,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:35,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538392552] [2021-05-22 02:33:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:35,769 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 02:33:35,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538392552] [2021-05-22 02:33:35,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538392552] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:35,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:35,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492444973] [2021-05-22 02:33:35,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:35,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:35,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:35,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:35,770 INFO L87 Difference]: Start difference. First operand 8848 states and 31514 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:38,310 INFO L93 Difference]: Finished difference Result 10683 states and 37856 transitions. [2021-05-22 02:33:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-22 02:33:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:38,330 INFO L225 Difference]: With dead ends: 10683 [2021-05-22 02:33:38,330 INFO L226 Difference]: Without dead ends: 10574 [2021-05-22 02:33:38,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1490.7ms TimeCoverageRelationStatistics Valid=456, Invalid=4514, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:33:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10574 states. [2021-05-22 02:33:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10574 to 8830. [2021-05-22 02:33:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8830 states, 8829 states have (on average 3.563597236380111) internal successors, (31463), 8829 states have internal predecessors, (31463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8830 states to 8830 states and 31463 transitions. [2021-05-22 02:33:38,473 INFO L78 Accepts]: Start accepts. Automaton has 8830 states and 31463 transitions. Word has length 47 [2021-05-22 02:33:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:38,473 INFO L482 AbstractCegarLoop]: Abstraction has 8830 states and 31463 transitions. [2021-05-22 02:33:38,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8830 states and 31463 transitions. [2021-05-22 02:33:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:38,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:38,485 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:38,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-05-22 02:33:38,485 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash -482580522, now seen corresponding path program 208 times [2021-05-22 02:33:38,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:38,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92520374] [2021-05-22 02:33:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:38,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:38,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92520374] [2021-05-22 02:33:38,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92520374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:38,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:38,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:33:38,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240348512] [2021-05-22 02:33:38,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:33:38,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:38,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:33:38,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:33:38,699 INFO L87 Difference]: Start difference. First operand 8830 states and 31463 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:41,696 INFO L93 Difference]: Finished difference Result 12830 states and 45389 transitions. [2021-05-22 02:33:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-22 02:33:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:41,720 INFO L225 Difference]: With dead ends: 12830 [2021-05-22 02:33:41,720 INFO L226 Difference]: Without dead ends: 12730 [2021-05-22 02:33:41,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 1625.7ms TimeCoverageRelationStatistics Valid=506, Invalid=5194, Unknown=0, NotChecked=0, Total=5700 [2021-05-22 02:33:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12730 states. [2021-05-22 02:33:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12730 to 8833. [2021-05-22 02:33:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 8832 states have (on average 3.5637454710144927) internal successors, (31475), 8832 states have internal predecessors, (31475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 31475 transitions. [2021-05-22 02:33:41,880 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 31475 transitions. Word has length 47 [2021-05-22 02:33:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:41,880 INFO L482 AbstractCegarLoop]: Abstraction has 8833 states and 31475 transitions. [2021-05-22 02:33:41,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 31475 transitions. [2021-05-22 02:33:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:41,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:41,892 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:41,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-05-22 02:33:41,893 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1892548664, now seen corresponding path program 209 times [2021-05-22 02:33:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:41,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082761972] [2021-05-22 02:33:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:42,101 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 02:33:42,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:42,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082761972] [2021-05-22 02:33:42,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082761972] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:42,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:42,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:33:42,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632164840] [2021-05-22 02:33:42,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:33:42,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:33:42,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:33:42,102 INFO L87 Difference]: Start difference. First operand 8833 states and 31475 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:45,056 INFO L93 Difference]: Finished difference Result 11794 states and 41896 transitions. [2021-05-22 02:33:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:33:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:45,076 INFO L225 Difference]: With dead ends: 11794 [2021-05-22 02:33:45,076 INFO L226 Difference]: Without dead ends: 11688 [2021-05-22 02:33:45,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 1645.9ms TimeCoverageRelationStatistics Valid=528, Invalid=5634, Unknown=0, NotChecked=0, Total=6162 [2021-05-22 02:33:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2021-05-22 02:33:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 8836. [2021-05-22 02:33:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8836 states, 8835 states have (on average 3.563554046406338) internal successors, (31484), 8835 states have internal predecessors, (31484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8836 states to 8836 states and 31484 transitions. [2021-05-22 02:33:45,216 INFO L78 Accepts]: Start accepts. Automaton has 8836 states and 31484 transitions. Word has length 47 [2021-05-22 02:33:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:45,217 INFO L482 AbstractCegarLoop]: Abstraction has 8836 states and 31484 transitions. [2021-05-22 02:33:45,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 8836 states and 31484 transitions. [2021-05-22 02:33:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:45,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:45,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:45,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-05-22 02:33:45,229 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2086966264, now seen corresponding path program 210 times [2021-05-22 02:33:45,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:45,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755854043] [2021-05-22 02:33:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:45,444 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 02:33:45,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:45,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755854043] [2021-05-22 02:33:45,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755854043] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:45,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:45,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185603231] [2021-05-22 02:33:45,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:45,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:45,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:45,445 INFO L87 Difference]: Start difference. First operand 8836 states and 31484 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:48,747 INFO L93 Difference]: Finished difference Result 13289 states and 47160 transitions. [2021-05-22 02:33:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 02:33:48,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:48,773 INFO L225 Difference]: With dead ends: 13289 [2021-05-22 02:33:48,774 INFO L226 Difference]: Without dead ends: 13189 [2021-05-22 02:33:48,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1776.1ms TimeCoverageRelationStatistics Valid=555, Invalid=6087, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:33:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13189 states. [2021-05-22 02:33:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13189 to 8836. [2021-05-22 02:33:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8836 states, 8835 states have (on average 3.563554046406338) internal successors, (31484), 8835 states have internal predecessors, (31484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8836 states to 8836 states and 31484 transitions. [2021-05-22 02:33:48,939 INFO L78 Accepts]: Start accepts. Automaton has 8836 states and 31484 transitions. Word has length 47 [2021-05-22 02:33:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:48,939 INFO L482 AbstractCegarLoop]: Abstraction has 8836 states and 31484 transitions. [2021-05-22 02:33:48,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8836 states and 31484 transitions. [2021-05-22 02:33:48,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:48,952 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:48,952 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:48,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-05-22 02:33:48,952 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1544083320, now seen corresponding path program 211 times [2021-05-22 02:33:48,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:48,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276355129] [2021-05-22 02:33:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:49,219 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 02:33:49,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:49,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276355129] [2021-05-22 02:33:49,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276355129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:49,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:49,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:49,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140187041] [2021-05-22 02:33:49,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:49,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:49,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:49,221 INFO L87 Difference]: Start difference. First operand 8836 states and 31484 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:52,183 INFO L93 Difference]: Finished difference Result 12138 states and 43268 transitions. [2021-05-22 02:33:52,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-22 02:33:52,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:52,203 INFO L225 Difference]: With dead ends: 12138 [2021-05-22 02:33:52,203 INFO L226 Difference]: Without dead ends: 12038 [2021-05-22 02:33:52,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1598.3ms TimeCoverageRelationStatistics Valid=511, Invalid=5495, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:33:52,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12038 states. [2021-05-22 02:33:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12038 to 8836. [2021-05-22 02:33:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8836 states, 8835 states have (on average 3.5632144878324845) internal successors, (31481), 8835 states have internal predecessors, (31481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8836 states to 8836 states and 31481 transitions. [2021-05-22 02:33:52,354 INFO L78 Accepts]: Start accepts. Automaton has 8836 states and 31481 transitions. Word has length 47 [2021-05-22 02:33:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:52,354 INFO L482 AbstractCegarLoop]: Abstraction has 8836 states and 31481 transitions. [2021-05-22 02:33:52,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8836 states and 31481 transitions. [2021-05-22 02:33:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:52,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:52,367 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:52,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-05-22 02:33:52,367 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1826486106, now seen corresponding path program 212 times [2021-05-22 02:33:52,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:52,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940853230] [2021-05-22 02:33:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:52,588 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 02:33:52,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:52,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940853230] [2021-05-22 02:33:52,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940853230] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:52,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:52,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:52,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494766848] [2021-05-22 02:33:52,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:52,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:52,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:52,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:52,589 INFO L87 Difference]: Start difference. First operand 8836 states and 31481 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:55,828 INFO L93 Difference]: Finished difference Result 12247 states and 43654 transitions. [2021-05-22 02:33:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:33:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:55,851 INFO L225 Difference]: With dead ends: 12247 [2021-05-22 02:33:55,851 INFO L226 Difference]: Without dead ends: 12150 [2021-05-22 02:33:55,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 1796.9ms TimeCoverageRelationStatistics Valid=577, Invalid=6563, Unknown=0, NotChecked=0, Total=7140 [2021-05-22 02:33:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-05-22 02:33:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 8842. [2021-05-22 02:33:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8842 states, 8841 states have (on average 3.562492930663952) internal successors, (31496), 8841 states have internal predecessors, (31496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 31496 transitions. [2021-05-22 02:33:56,006 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 31496 transitions. Word has length 47 [2021-05-22 02:33:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:56,006 INFO L482 AbstractCegarLoop]: Abstraction has 8842 states and 31496 transitions. [2021-05-22 02:33:56,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:56,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 31496 transitions. [2021-05-22 02:33:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:56,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:56,019 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:56,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-05-22 02:33:56,019 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1909374712, now seen corresponding path program 213 times [2021-05-22 02:33:56,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:56,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648521496] [2021-05-22 02:33:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:56,240 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 02:33:56,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:56,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648521496] [2021-05-22 02:33:56,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648521496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:56,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:56,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:56,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694010110] [2021-05-22 02:33:56,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:56,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:56,241 INFO L87 Difference]: Start difference. First operand 8842 states and 31496 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:59,034 INFO L93 Difference]: Finished difference Result 11540 states and 41075 transitions. [2021-05-22 02:33:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:33:59,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:33:59,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:59,055 INFO L225 Difference]: With dead ends: 11540 [2021-05-22 02:33:59,056 INFO L226 Difference]: Without dead ends: 11434 [2021-05-22 02:33:59,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1523.9ms TimeCoverageRelationStatistics Valid=476, Invalid=4926, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:33:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-05-22 02:33:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 8827. [2021-05-22 02:33:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8827 states, 8826 states have (on average 3.5645819170632222) internal successors, (31461), 8826 states have internal predecessors, (31461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8827 states to 8827 states and 31461 transitions. [2021-05-22 02:33:59,215 INFO L78 Accepts]: Start accepts. Automaton has 8827 states and 31461 transitions. Word has length 47 [2021-05-22 02:33:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:59,216 INFO L482 AbstractCegarLoop]: Abstraction has 8827 states and 31461 transitions. [2021-05-22 02:33:59,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8827 states and 31461 transitions. [2021-05-22 02:33:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:33:59,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:59,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:59,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-05-22 02:33:59,229 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash -879416932, now seen corresponding path program 214 times [2021-05-22 02:33:59,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:59,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732214464] [2021-05-22 02:33:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:59,495 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 02:33:59,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732214464] [2021-05-22 02:33:59,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732214464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:33:59,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:33:59,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:33:59,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294200794] [2021-05-22 02:33:59,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:33:59,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:33:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:33:59,496 INFO L87 Difference]: Start difference. First operand 8827 states and 31461 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:06,516 INFO L93 Difference]: Finished difference Result 21470 states and 75784 transitions. [2021-05-22 02:34:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-05-22 02:34:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:06,555 INFO L225 Difference]: With dead ends: 21470 [2021-05-22 02:34:06,555 INFO L226 Difference]: Without dead ends: 20925 [2021-05-22 02:34:06,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 4653.1ms TimeCoverageRelationStatistics Valid=1872, Invalid=26858, Unknown=0, NotChecked=0, Total=28730 [2021-05-22 02:34:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20925 states. [2021-05-22 02:34:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20925 to 9629. [2021-05-22 02:34:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9629 states, 9628 states have (on average 3.578728707935189) internal successors, (34456), 9628 states have internal predecessors, (34456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9629 states to 9629 states and 34456 transitions. [2021-05-22 02:34:06,791 INFO L78 Accepts]: Start accepts. Automaton has 9629 states and 34456 transitions. Word has length 47 [2021-05-22 02:34:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:06,791 INFO L482 AbstractCegarLoop]: Abstraction has 9629 states and 34456 transitions. [2021-05-22 02:34:06,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9629 states and 34456 transitions. [2021-05-22 02:34:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:06,805 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:06,805 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:06,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-05-22 02:34:06,805 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:06,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1302928890, now seen corresponding path program 215 times [2021-05-22 02:34:06,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:06,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592031144] [2021-05-22 02:34:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:07,025 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 02:34:07,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:07,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592031144] [2021-05-22 02:34:07,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592031144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:07,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:07,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:34:07,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421271385] [2021-05-22 02:34:07,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:34:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:34:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:34:07,026 INFO L87 Difference]: Start difference. First operand 9629 states and 34456 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:12,061 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-22 02:34:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:14,354 INFO L93 Difference]: Finished difference Result 21062 states and 74515 transitions. [2021-05-22 02:34:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-05-22 02:34:14,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:14,394 INFO L225 Difference]: With dead ends: 21062 [2021-05-22 02:34:14,394 INFO L226 Difference]: Without dead ends: 20574 [2021-05-22 02:34:14,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11784 ImplicationChecksByTransitivity, 4718.7ms TimeCoverageRelationStatistics Valid=1970, Invalid=28132, Unknown=0, NotChecked=0, Total=30102 [2021-05-22 02:34:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20574 states. [2021-05-22 02:34:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20574 to 10092. [2021-05-22 02:34:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10092 states, 10091 states have (on average 3.5850758101278366) internal successors, (36177), 10091 states have internal predecessors, (36177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10092 states to 10092 states and 36177 transitions. [2021-05-22 02:34:14,633 INFO L78 Accepts]: Start accepts. Automaton has 10092 states and 36177 transitions. Word has length 47 [2021-05-22 02:34:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:14,633 INFO L482 AbstractCegarLoop]: Abstraction has 10092 states and 36177 transitions. [2021-05-22 02:34:14,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10092 states and 36177 transitions. [2021-05-22 02:34:14,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:14,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:14,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:14,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-05-22 02:34:14,648 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash -713231814, now seen corresponding path program 216 times [2021-05-22 02:34:14,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:14,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700878833] [2021-05-22 02:34:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:14,883 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 02:34:14,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:14,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700878833] [2021-05-22 02:34:14,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700878833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:14,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:14,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:34:14,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469081468] [2021-05-22 02:34:14,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:34:14,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:34:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:34:14,884 INFO L87 Difference]: Start difference. First operand 10092 states and 36177 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:21,592 INFO L93 Difference]: Finished difference Result 22066 states and 78190 transitions. [2021-05-22 02:34:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-05-22 02:34:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:21,632 INFO L225 Difference]: With dead ends: 22066 [2021-05-22 02:34:21,632 INFO L226 Difference]: Without dead ends: 21548 [2021-05-22 02:34:21,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10007 ImplicationChecksByTransitivity, 4440.5ms TimeCoverageRelationStatistics Valid=1698, Invalid=24384, Unknown=0, NotChecked=0, Total=26082 [2021-05-22 02:34:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2021-05-22 02:34:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 10307. [2021-05-22 02:34:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10307 states, 10306 states have (on average 3.5859693382495634) internal successors, (36957), 10306 states have internal predecessors, (36957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10307 states to 10307 states and 36957 transitions. [2021-05-22 02:34:21,867 INFO L78 Accepts]: Start accepts. Automaton has 10307 states and 36957 transitions. Word has length 47 [2021-05-22 02:34:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:21,868 INFO L482 AbstractCegarLoop]: Abstraction has 10307 states and 36957 transitions. [2021-05-22 02:34:21,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10307 states and 36957 transitions. [2021-05-22 02:34:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:21,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:21,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:21,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-05-22 02:34:21,883 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash 539030326, now seen corresponding path program 217 times [2021-05-22 02:34:21,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:21,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654535773] [2021-05-22 02:34:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:22,112 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 02:34:22,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:22,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654535773] [2021-05-22 02:34:22,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654535773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:22,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:22,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:34:22,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185363708] [2021-05-22 02:34:22,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:34:22,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:22,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:34:22,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:34:22,113 INFO L87 Difference]: Start difference. First operand 10307 states and 36957 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:28,208 INFO L93 Difference]: Finished difference Result 21218 states and 75598 transitions. [2021-05-22 02:34:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-22 02:34:28,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:28,247 INFO L225 Difference]: With dead ends: 21218 [2021-05-22 02:34:28,247 INFO L226 Difference]: Without dead ends: 20996 [2021-05-22 02:34:28,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 3936.7ms TimeCoverageRelationStatistics Valid=1464, Invalid=19706, Unknown=0, NotChecked=0, Total=21170 [2021-05-22 02:34:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20996 states. [2021-05-22 02:34:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20996 to 10857. [2021-05-22 02:34:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10857 states, 10856 states have (on average 3.5916543846720708) internal successors, (38991), 10856 states have internal predecessors, (38991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10857 states to 10857 states and 38991 transitions. [2021-05-22 02:34:28,499 INFO L78 Accepts]: Start accepts. Automaton has 10857 states and 38991 transitions. Word has length 47 [2021-05-22 02:34:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:28,499 INFO L482 AbstractCegarLoop]: Abstraction has 10857 states and 38991 transitions. [2021-05-22 02:34:28,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10857 states and 38991 transitions. [2021-05-22 02:34:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:28,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:28,514 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:28,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-05-22 02:34:28,515 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:28,515 INFO L82 PathProgramCache]: Analyzing trace with hash 472967768, now seen corresponding path program 218 times [2021-05-22 02:34:28,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:28,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624715555] [2021-05-22 02:34:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:28,734 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 02:34:28,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:28,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624715555] [2021-05-22 02:34:28,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624715555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:28,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:28,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:34:28,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029175362] [2021-05-22 02:34:28,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:34:28,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:28,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:34:28,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:34:28,735 INFO L87 Difference]: Start difference. First operand 10857 states and 38991 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:34,909 INFO L93 Difference]: Finished difference Result 22737 states and 81208 transitions. [2021-05-22 02:34:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-05-22 02:34:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:34,952 INFO L225 Difference]: With dead ends: 22737 [2021-05-22 02:34:34,952 INFO L226 Difference]: Without dead ends: 22467 [2021-05-22 02:34:34,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9190 ImplicationChecksByTransitivity, 3949.0ms TimeCoverageRelationStatistics Valid=1568, Invalid=22612, Unknown=0, NotChecked=0, Total=24180 [2021-05-22 02:34:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22467 states. [2021-05-22 02:34:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22467 to 10976. [2021-05-22 02:34:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10976 states, 10975 states have (on average 3.5905239179954442) internal successors, (39406), 10975 states have internal predecessors, (39406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10976 states to 10976 states and 39406 transitions. [2021-05-22 02:34:35,202 INFO L78 Accepts]: Start accepts. Automaton has 10976 states and 39406 transitions. Word has length 47 [2021-05-22 02:34:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:35,202 INFO L482 AbstractCegarLoop]: Abstraction has 10976 states and 39406 transitions. [2021-05-22 02:34:35,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 10976 states and 39406 transitions. [2021-05-22 02:34:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:35,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:35,218 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:35,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-05-22 02:34:35,218 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:35,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:35,218 INFO L82 PathProgramCache]: Analyzing trace with hash 328285080, now seen corresponding path program 219 times [2021-05-22 02:34:35,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:35,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281094156] [2021-05-22 02:34:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:35,448 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 02:34:35,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281094156] [2021-05-22 02:34:35,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281094156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:35,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:35,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:34:35,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426966949] [2021-05-22 02:34:35,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:34:35,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:35,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:34:35,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:34:35,449 INFO L87 Difference]: Start difference. First operand 10976 states and 39406 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:43,106 INFO L93 Difference]: Finished difference Result 22963 states and 81306 transitions. [2021-05-22 02:34:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-05-22 02:34:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:43,148 INFO L225 Difference]: With dead ends: 22963 [2021-05-22 02:34:43,148 INFO L226 Difference]: Without dead ends: 22717 [2021-05-22 02:34:43,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12973 ImplicationChecksByTransitivity, 4874.3ms TimeCoverageRelationStatistics Valid=1984, Invalid=30958, Unknown=0, NotChecked=0, Total=32942 [2021-05-22 02:34:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22717 states. [2021-05-22 02:34:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22717 to 11160. [2021-05-22 02:34:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11160 states, 11159 states have (on average 3.593780804731607) internal successors, (40103), 11159 states have internal predecessors, (40103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11160 states to 11160 states and 40103 transitions. [2021-05-22 02:34:43,430 INFO L78 Accepts]: Start accepts. Automaton has 11160 states and 40103 transitions. Word has length 47 [2021-05-22 02:34:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:43,430 INFO L482 AbstractCegarLoop]: Abstraction has 11160 states and 40103 transitions. [2021-05-22 02:34:43,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11160 states and 40103 transitions. [2021-05-22 02:34:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:43,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:43,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:43,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-05-22 02:34:43,521 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:43,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1934718922, now seen corresponding path program 220 times [2021-05-22 02:34:43,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:43,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133954195] [2021-05-22 02:34:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:43,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:43,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133954195] [2021-05-22 02:34:43,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133954195] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:43,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:43,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:34:43,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811851692] [2021-05-22 02:34:43,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:34:43,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:43,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:34:43,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:34:43,747 INFO L87 Difference]: Start difference. First operand 11160 states and 40103 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:51,005 INFO L93 Difference]: Finished difference Result 22773 states and 81052 transitions. [2021-05-22 02:34:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-05-22 02:34:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:51,046 INFO L225 Difference]: With dead ends: 22773 [2021-05-22 02:34:51,046 INFO L226 Difference]: Without dead ends: 22676 [2021-05-22 02:34:51,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11392 ImplicationChecksByTransitivity, 4591.9ms TimeCoverageRelationStatistics Valid=1905, Invalid=27507, Unknown=0, NotChecked=0, Total=29412 [2021-05-22 02:34:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22676 states. [2021-05-22 02:34:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22676 to 11209. [2021-05-22 02:34:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11209 states, 11208 states have (on average 3.59243397573162) internal successors, (40264), 11208 states have internal predecessors, (40264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11209 states to 11209 states and 40264 transitions. [2021-05-22 02:34:51,296 INFO L78 Accepts]: Start accepts. Automaton has 11209 states and 40264 transitions. Word has length 47 [2021-05-22 02:34:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:51,297 INFO L482 AbstractCegarLoop]: Abstraction has 11209 states and 40264 transitions. [2021-05-22 02:34:51,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 11209 states and 40264 transitions. [2021-05-22 02:34:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:51,312 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:51,312 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:51,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-05-22 02:34:51,313 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 634827864, now seen corresponding path program 221 times [2021-05-22 02:34:51,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:51,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46490824] [2021-05-22 02:34:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:51,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:51,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46490824] [2021-05-22 02:34:51,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46490824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:51,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:51,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:34:51,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445663593] [2021-05-22 02:34:51,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:34:51,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:34:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:34:51,530 INFO L87 Difference]: Start difference. First operand 11209 states and 40264 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:58,717 INFO L93 Difference]: Finished difference Result 23042 states and 82015 transitions. [2021-05-22 02:34:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-05-22 02:34:58,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:34:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:58,760 INFO L225 Difference]: With dead ends: 23042 [2021-05-22 02:34:58,760 INFO L226 Difference]: Without dead ends: 22757 [2021-05-22 02:34:58,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11097 ImplicationChecksByTransitivity, 4423.5ms TimeCoverageRelationStatistics Valid=1794, Invalid=26936, Unknown=0, NotChecked=0, Total=28730 [2021-05-22 02:34:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22757 states. [2021-05-22 02:34:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22757 to 11188. [2021-05-22 02:34:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11188 states, 11187 states have (on average 3.5952444802002326) internal successors, (40220), 11187 states have internal predecessors, (40220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11188 states to 11188 states and 40220 transitions. [2021-05-22 02:34:59,027 INFO L78 Accepts]: Start accepts. Automaton has 11188 states and 40220 transitions. Word has length 47 [2021-05-22 02:34:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:59,028 INFO L482 AbstractCegarLoop]: Abstraction has 11188 states and 40220 transitions. [2021-05-22 02:34:59,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11188 states and 40220 transitions. [2021-05-22 02:34:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:34:59,044 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:59,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:59,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-05-22 02:34:59,044 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:59,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:59,044 INFO L82 PathProgramCache]: Analyzing trace with hash -373526892, now seen corresponding path program 222 times [2021-05-22 02:34:59,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:59,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244201562] [2021-05-22 02:34:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:59,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:59,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244201562] [2021-05-22 02:34:59,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244201562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:34:59,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:34:59,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:34:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649171845] [2021-05-22 02:34:59,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:34:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:34:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:34:59,257 INFO L87 Difference]: Start difference. First operand 11188 states and 40220 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:04,630 INFO L93 Difference]: Finished difference Result 20086 states and 72142 transitions. [2021-05-22 02:35:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-22 02:35:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:04,675 INFO L225 Difference]: With dead ends: 20086 [2021-05-22 02:35:04,675 INFO L226 Difference]: Without dead ends: 19748 [2021-05-22 02:35:04,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5482 ImplicationChecksByTransitivity, 3036.4ms TimeCoverageRelationStatistics Valid=1105, Invalid=14147, Unknown=0, NotChecked=0, Total=15252 [2021-05-22 02:35:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19748 states. [2021-05-22 02:35:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19748 to 12554. [2021-05-22 02:35:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12554 states, 12553 states have (on average 3.6132398629809606) internal successors, (45357), 12553 states have internal predecessors, (45357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12554 states to 12554 states and 45357 transitions. [2021-05-22 02:35:05,064 INFO L78 Accepts]: Start accepts. Automaton has 12554 states and 45357 transitions. Word has length 47 [2021-05-22 02:35:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:05,064 INFO L482 AbstractCegarLoop]: Abstraction has 12554 states and 45357 transitions. [2021-05-22 02:35:05,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12554 states and 45357 transitions. [2021-05-22 02:35:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:05,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:05,087 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:05,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-05-22 02:35:05,087 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1261066836, now seen corresponding path program 223 times [2021-05-22 02:35:05,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:05,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577967904] [2021-05-22 02:35:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:05,350 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 02:35:05,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:05,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577967904] [2021-05-22 02:35:05,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577967904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:05,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:05,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:35:05,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322027450] [2021-05-22 02:35:05,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:35:05,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:35:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:35:05,351 INFO L87 Difference]: Start difference. First operand 12554 states and 45357 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:13,474 INFO L93 Difference]: Finished difference Result 22418 states and 80247 transitions. [2021-05-22 02:35:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-05-22 02:35:13,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:13,521 INFO L225 Difference]: With dead ends: 22418 [2021-05-22 02:35:13,521 INFO L226 Difference]: Without dead ends: 21923 [2021-05-22 02:35:13,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10790 ImplicationChecksByTransitivity, 5063.9ms TimeCoverageRelationStatistics Valid=1776, Invalid=25946, Unknown=0, NotChecked=0, Total=27722 [2021-05-22 02:35:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21923 states. [2021-05-22 02:35:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21923 to 12811. [2021-05-22 02:35:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12811 states, 12810 states have (on average 3.6081967213114754) internal successors, (46221), 12810 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 46221 transitions. [2021-05-22 02:35:13,865 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 46221 transitions. Word has length 47 [2021-05-22 02:35:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:13,866 INFO L482 AbstractCegarLoop]: Abstraction has 12811 states and 46221 transitions. [2021-05-22 02:35:13,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 46221 transitions. [2021-05-22 02:35:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:13,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:13,893 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:13,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-05-22 02:35:13,893 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:13,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1440283146, now seen corresponding path program 224 times [2021-05-22 02:35:13,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:13,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91192969] [2021-05-22 02:35:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:14,124 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 02:35:14,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:14,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91192969] [2021-05-22 02:35:14,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91192969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:14,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:14,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-22 02:35:14,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684971262] [2021-05-22 02:35:14,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:35:14,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:14,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:35:14,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:35:14,126 INFO L87 Difference]: Start difference. First operand 12811 states and 46221 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:20,208 INFO L93 Difference]: Finished difference Result 20084 states and 71937 transitions. [2021-05-22 02:35:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-22 02:35:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:20,255 INFO L225 Difference]: With dead ends: 20084 [2021-05-22 02:35:20,255 INFO L226 Difference]: Without dead ends: 19746 [2021-05-22 02:35:20,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 3454.8ms TimeCoverageRelationStatistics Valid=1257, Invalid=16833, Unknown=0, NotChecked=0, Total=18090 [2021-05-22 02:35:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19746 states. [2021-05-22 02:35:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19746 to 12826. [2021-05-22 02:35:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 12825 states have (on average 3.608421052631579) internal successors, (46278), 12825 states have internal predecessors, (46278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 46278 transitions. [2021-05-22 02:35:20,595 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 46278 transitions. Word has length 47 [2021-05-22 02:35:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:20,595 INFO L482 AbstractCegarLoop]: Abstraction has 12826 states and 46278 transitions. [2021-05-22 02:35:20,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 46278 transitions. [2021-05-22 02:35:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:20,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:20,618 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:20,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-05-22 02:35:20,618 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash -71853484, now seen corresponding path program 225 times [2021-05-22 02:35:20,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:20,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171185630] [2021-05-22 02:35:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:20,849 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 02:35:20,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171185630] [2021-05-22 02:35:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171185630] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:20,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:20,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:35:20,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757768338] [2021-05-22 02:35:20,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:35:20,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:35:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:35:20,850 INFO L87 Difference]: Start difference. First operand 12826 states and 46278 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:28,975 INFO L93 Difference]: Finished difference Result 23699 states and 84833 transitions. [2021-05-22 02:35:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-05-22 02:35:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:29,025 INFO L225 Difference]: With dead ends: 23699 [2021-05-22 02:35:29,026 INFO L226 Difference]: Without dead ends: 23018 [2021-05-22 02:35:29,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11818 ImplicationChecksByTransitivity, 4814.7ms TimeCoverageRelationStatistics Valid=1872, Invalid=28230, Unknown=0, NotChecked=0, Total=30102 [2021-05-22 02:35:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23018 states. [2021-05-22 02:35:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23018 to 13332. [2021-05-22 02:35:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13332 states, 13331 states have (on average 3.6109819218363213) internal successors, (48138), 13331 states have internal predecessors, (48138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13332 states to 13332 states and 48138 transitions. [2021-05-22 02:35:29,376 INFO L78 Accepts]: Start accepts. Automaton has 13332 states and 48138 transitions. Word has length 47 [2021-05-22 02:35:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:29,376 INFO L482 AbstractCegarLoop]: Abstraction has 13332 states and 48138 transitions. [2021-05-22 02:35:29,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13332 states and 48138 transitions. [2021-05-22 02:35:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:29,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:29,398 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:29,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-05-22 02:35:29,398 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:29,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:29,398 INFO L82 PathProgramCache]: Analyzing trace with hash -575561832, now seen corresponding path program 226 times [2021-05-22 02:35:29,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:29,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352643629] [2021-05-22 02:35:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:29,622 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 02:35:29,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352643629] [2021-05-22 02:35:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352643629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:29,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:29,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:35:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751387619] [2021-05-22 02:35:29,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:35:29,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:35:29,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:35:29,623 INFO L87 Difference]: Start difference. First operand 13332 states and 48138 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:36,952 INFO L93 Difference]: Finished difference Result 24381 states and 87583 transitions. [2021-05-22 02:35:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-05-22 02:35:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:36,999 INFO L225 Difference]: With dead ends: 24381 [2021-05-22 02:35:36,999 INFO L226 Difference]: Without dead ends: 23914 [2021-05-22 02:35:37,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10081 ImplicationChecksByTransitivity, 4754.7ms TimeCoverageRelationStatistics Valid=1693, Invalid=24389, Unknown=0, NotChecked=0, Total=26082 [2021-05-22 02:35:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23914 states. [2021-05-22 02:35:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23914 to 13748. [2021-05-22 02:35:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13748 states, 13747 states have (on average 3.610314977813341) internal successors, (49631), 13747 states have internal predecessors, (49631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 49631 transitions. [2021-05-22 02:35:37,339 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 49631 transitions. Word has length 47 [2021-05-22 02:35:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:37,339 INFO L482 AbstractCegarLoop]: Abstraction has 13748 states and 49631 transitions. [2021-05-22 02:35:37,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 49631 transitions. [2021-05-22 02:35:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:37,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:37,360 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:37,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-05-22 02:35:37,361 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1102676274, now seen corresponding path program 227 times [2021-05-22 02:35:37,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:37,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313659870] [2021-05-22 02:35:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:35:37,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313659870] [2021-05-22 02:35:37,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313659870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:37,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:37,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:35:37,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585711157] [2021-05-22 02:35:37,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:35:37,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:35:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:35:37,583 INFO L87 Difference]: Start difference. First operand 13748 states and 49631 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:43,328 INFO L93 Difference]: Finished difference Result 23835 states and 85249 transitions. [2021-05-22 02:35:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-22 02:35:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:43,373 INFO L225 Difference]: With dead ends: 23835 [2021-05-22 02:35:43,374 INFO L226 Difference]: Without dead ends: 23310 [2021-05-22 02:35:43,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5876 ImplicationChecksByTransitivity, 3533.7ms TimeCoverageRelationStatistics Valid=1211, Invalid=15301, Unknown=0, NotChecked=0, Total=16512 [2021-05-22 02:35:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23310 states. [2021-05-22 02:35:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23310 to 14261. [2021-05-22 02:35:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14261 states, 14260 states have (on average 3.614586255259467) internal successors, (51544), 14260 states have internal predecessors, (51544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14261 states to 14261 states and 51544 transitions. [2021-05-22 02:35:43,819 INFO L78 Accepts]: Start accepts. Automaton has 14261 states and 51544 transitions. Word has length 47 [2021-05-22 02:35:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:43,819 INFO L482 AbstractCegarLoop]: Abstraction has 14261 states and 51544 transitions. [2021-05-22 02:35:43,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 14261 states and 51544 transitions. [2021-05-22 02:35:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:43,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:43,843 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:43,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-05-22 02:35:43,843 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1036613716, now seen corresponding path program 228 times [2021-05-22 02:35:43,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:43,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365621128] [2021-05-22 02:35:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:44,066 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 02:35:44,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365621128] [2021-05-22 02:35:44,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365621128] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:44,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:44,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:35:44,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905168550] [2021-05-22 02:35:44,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:35:44,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:35:44,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:35:44,067 INFO L87 Difference]: Start difference. First operand 14261 states and 51544 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:47,875 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-22 02:35:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:50,356 INFO L93 Difference]: Finished difference Result 24200 states and 86642 transitions. [2021-05-22 02:35:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-22 02:35:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:50,404 INFO L225 Difference]: With dead ends: 24200 [2021-05-22 02:35:50,404 INFO L226 Difference]: Without dead ends: 23649 [2021-05-22 02:35:50,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6934 ImplicationChecksByTransitivity, 3802.4ms TimeCoverageRelationStatistics Valid=1270, Invalid=17636, Unknown=0, NotChecked=0, Total=18906 [2021-05-22 02:35:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23649 states. [2021-05-22 02:35:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23649 to 14486. [2021-05-22 02:35:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14486 states, 14485 states have (on average 3.609941318605454) internal successors, (52290), 14485 states have internal predecessors, (52290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14486 states to 14486 states and 52290 transitions. [2021-05-22 02:35:50,770 INFO L78 Accepts]: Start accepts. Automaton has 14486 states and 52290 transitions. Word has length 47 [2021-05-22 02:35:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:50,770 INFO L482 AbstractCegarLoop]: Abstraction has 14486 states and 52290 transitions. [2021-05-22 02:35:50,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 14486 states and 52290 transitions. [2021-05-22 02:35:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:50,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:50,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:50,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-05-22 02:35:50,795 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:50,795 INFO L82 PathProgramCache]: Analyzing trace with hash -221040522, now seen corresponding path program 229 times [2021-05-22 02:35:50,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:50,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315442523] [2021-05-22 02:35:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:51,018 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 02:35:51,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:51,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315442523] [2021-05-22 02:35:51,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315442523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:51,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:51,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:35:51,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276585809] [2021-05-22 02:35:51,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:35:51,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:51,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:35:51,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:35:51,019 INFO L87 Difference]: Start difference. First operand 14486 states and 52290 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:59,202 INFO L93 Difference]: Finished difference Result 26456 states and 94786 transitions. [2021-05-22 02:35:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-05-22 02:35:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:35:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:59,256 INFO L225 Difference]: With dead ends: 26456 [2021-05-22 02:35:59,256 INFO L226 Difference]: Without dead ends: 25973 [2021-05-22 02:35:59,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12688 ImplicationChecksByTransitivity, 4926.0ms TimeCoverageRelationStatistics Valid=1977, Invalid=30243, Unknown=0, NotChecked=0, Total=32220 [2021-05-22 02:35:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25973 states. [2021-05-22 02:35:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25973 to 14845. [2021-05-22 02:35:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14845 states, 14844 states have (on average 3.613648612233899) internal successors, (53641), 14844 states have internal predecessors, (53641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14845 states to 14845 states and 53641 transitions. [2021-05-22 02:35:59,628 INFO L78 Accepts]: Start accepts. Automaton has 14845 states and 53641 transitions. Word has length 47 [2021-05-22 02:35:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:59,628 INFO L482 AbstractCegarLoop]: Abstraction has 14845 states and 53641 transitions. [2021-05-22 02:35:59,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 14845 states and 53641 transitions. [2021-05-22 02:35:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:35:59,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:59,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:59,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-05-22 02:35:59,652 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash 47622808, now seen corresponding path program 230 times [2021-05-22 02:35:59,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:59,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307068752] [2021-05-22 02:35:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:35:59,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:59,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307068752] [2021-05-22 02:35:59,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307068752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:35:59,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:35:59,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:35:59,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700713375] [2021-05-22 02:35:59,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:35:59,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:59,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:35:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:35:59,876 INFO L87 Difference]: Start difference. First operand 14845 states and 53641 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:09,003 INFO L93 Difference]: Finished difference Result 30319 states and 108230 transitions. [2021-05-22 02:36:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-05-22 02:36:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:36:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:09,063 INFO L225 Difference]: With dead ends: 30319 [2021-05-22 02:36:09,064 INFO L226 Difference]: Without dead ends: 29715 [2021-05-22 02:36:09,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16816 ImplicationChecksByTransitivity, 5668.8ms TimeCoverageRelationStatistics Valid=2284, Invalid=39128, Unknown=0, NotChecked=0, Total=41412 [2021-05-22 02:36:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29715 states. [2021-05-22 02:36:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29715 to 14990. [2021-05-22 02:36:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14990 states, 14989 states have (on average 3.6146507438788444) internal successors, (54180), 14989 states have internal predecessors, (54180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14990 states to 14990 states and 54180 transitions. [2021-05-22 02:36:09,536 INFO L78 Accepts]: Start accepts. Automaton has 14990 states and 54180 transitions. Word has length 47 [2021-05-22 02:36:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:09,536 INFO L482 AbstractCegarLoop]: Abstraction has 14990 states and 54180 transitions. [2021-05-22 02:36:09,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 14990 states and 54180 transitions. [2021-05-22 02:36:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:36:09,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:09,560 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:09,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-05-22 02:36:09,560 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1619044244, now seen corresponding path program 231 times [2021-05-22 02:36:09,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:09,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951513528] [2021-05-22 02:36:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:09,799 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 02:36:09,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:09,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951513528] [2021-05-22 02:36:09,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951513528] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:09,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:09,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:36:09,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202426672] [2021-05-22 02:36:09,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:36:09,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:36:09,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:36:09,800 INFO L87 Difference]: Start difference. First operand 14990 states and 54180 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:18,694 INFO L93 Difference]: Finished difference Result 31990 states and 115051 transitions. [2021-05-22 02:36:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-05-22 02:36:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:36:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:18,760 INFO L225 Difference]: With dead ends: 31990 [2021-05-22 02:36:18,760 INFO L226 Difference]: Without dead ends: 31267 [2021-05-22 02:36:18,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14894 ImplicationChecksByTransitivity, 5490.2ms TimeCoverageRelationStatistics Valid=2194, Invalid=34862, Unknown=0, NotChecked=0, Total=37056 [2021-05-22 02:36:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31267 states. [2021-05-22 02:36:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31267 to 15966. [2021-05-22 02:36:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15966 states, 15965 states have (on average 3.623676792984654) internal successors, (57852), 15965 states have internal predecessors, (57852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15966 states to 15966 states and 57852 transitions. [2021-05-22 02:36:19,202 INFO L78 Accepts]: Start accepts. Automaton has 15966 states and 57852 transitions. Word has length 47 [2021-05-22 02:36:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:19,202 INFO L482 AbstractCegarLoop]: Abstraction has 15966 states and 57852 transitions. [2021-05-22 02:36:19,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15966 states and 57852 transitions. [2021-05-22 02:36:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:36:19,226 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:19,226 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:19,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-05-22 02:36:19,227 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1917935922, now seen corresponding path program 232 times [2021-05-22 02:36:19,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:19,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585140772] [2021-05-22 02:36:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:19,450 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 02:36:19,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:19,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585140772] [2021-05-22 02:36:19,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585140772] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:19,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:19,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-22 02:36:19,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313732908] [2021-05-22 02:36:19,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:36:19,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:36:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:36:19,451 INFO L87 Difference]: Start difference. First operand 15966 states and 57852 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-05-22 02:36:24,607 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-05-22 02:36:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-22 02:36:24,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-05-22 02:36:24,608 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:36:24,608 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-22 02:36:24,609 INFO L255 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-05-22 02:36:24,610 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:36:24,610 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:36:24,610 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:36:24,610 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:36:24,610 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:36:24,610 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:36:24,610 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:36:24,610 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:36:24,612 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 80 places, 65 transitions, 202 flow [2021-05-22 02:36:24,613 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:36:24,613 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-22 02:36:24,613 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:36:24,615 WARN L196 ceAbstractionStarter]: Timeout [2021-05-22 02:36:24,615 INFO L202 PluginConnector]: Adding new model barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:36:24 BasicIcfg [2021-05-22 02:36:24,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:36:24,615 INFO L168 Benchmark]: Toolchain (without parser) took 718638.44 ms. Allocated memory was 339.7 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 319.4 MB in the beginning and 1.0 GB in the end (delta: -707.7 MB). Peak memory consumption was 886.2 MB. Max. memory is 16.0 GB. [2021-05-22 02:36:24,615 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:36:24,616 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.40 ms. Allocated memory is still 339.7 MB. Free memory was 319.3 MB in the beginning and 317.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:36:24,616 INFO L168 Benchmark]: Boogie Preprocessor took 17.33 ms. Allocated memory is still 339.7 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 965.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:36:24,616 INFO L168 Benchmark]: RCFGBuilder took 251.29 ms. Allocated memory is still 339.7 MB. Free memory was 316.8 MB in the beginning and 303.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:36:24,616 INFO L168 Benchmark]: TraceAbstraction took 718335.93 ms. Allocated memory was 339.7 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 302.8 MB in the beginning and 1.0 GB in the end (delta: -724.3 MB). Peak memory consumption was 871.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:36:24,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.40 ms. Allocated memory is still 339.7 MB. Free memory was 319.3 MB in the beginning and 317.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.33 ms. Allocated memory is still 339.7 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 965.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 251.29 ms. Allocated memory is still 339.7 MB. Free memory was 316.8 MB in the beginning and 303.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 718335.93 ms. Allocated memory was 339.7 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 302.8 MB in the beginning and 1.0 GB in the end (delta: -724.3 MB). Peak memory consumption was 871.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (15966states) and FLOYD_HOARE automaton (currently 122 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 29ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 112 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 718133.3ms, OverallIterations: 232, TraceHistogramMax: 1, EmptinessCheckTime: 2662.0ms, AutomataDifference: 626880.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 411.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 68157 SDtfs, 155897 SDslu, 809843 SDs, 0 SdLazy, 625660 SolverSat, 27927 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 213622.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17210 GetRequests, 267 SyntacticMatches, 280 SemanticMatches, 16662 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517760 ImplicationChecksByTransitivity, 382876.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15966occurred in iteration=231, InterpolantAutomatonStates: 15202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31573.2ms AutomataMinimizationTime, 231 MinimizatonAttempts, 659596 StatesRemovedByMinimization, 229 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 158.4ms SsaConstructionTime, 506.1ms SatisfiabilityAnalysisTime, 55036.5ms InterpolantComputationTime, 10904 NumberOfCodeBlocks, 10904 NumberOfCodeBlocksAsserted, 232 NumberOfCheckSat, 10672 ConstructedInterpolants, 0 QuantifiedInterpolants, 145853 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 232 InterpolantComputations, 232 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 13 procedures, 112 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown