/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/bakery-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:23:51,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:23:51,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:23:51,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:23:51,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:23:51,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:23:51,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:23:51,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:23:51,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:23:51,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:23:51,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:23:51,954 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:23:51,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:23:51,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:23:51,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:23:51,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:23:51,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:23:51,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:23:51,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:23:51,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:23:51,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:23:51,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:23:51,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:23:51,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:23:51,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:23:51,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:23:51,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:23:51,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:23:51,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:23:51,957 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:23:51,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:23:52,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:23:52,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:23:52,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:23:52,258 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:23:52,259 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:23:52,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl [2021-05-22 02:23:52,260 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl' [2021-05-22 02:23:52,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:23:52,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:23:52,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:52,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:23:52,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:23:52,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:52,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:23:52,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:23:52,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:23:52,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... [2021-05-22 02:23:52,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:23:52,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:23:52,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:23:52,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:23:52,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:23:52,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:23:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:23:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:23:52,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:23:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:23:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:23:52,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:23:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:23:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:23:52,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:23:52,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:23:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:23:52,436 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:23:52,637 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:23:52,637 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:23:52,638 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:52 BoogieIcfgContainer [2021-05-22 02:23:52,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:23:52,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:23:52,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:23:52,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:23:52,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:52" (1/2) ... [2021-05-22 02:23:52,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39024c5 and model type bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:23:52, skipping insertion in model container [2021-05-22 02:23:52,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:52" (2/2) ... [2021-05-22 02:23:52,645 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-3.wvr.bpl [2021-05-22 02:23:52,649 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:23:52,649 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:23:52,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:23:52,650 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:23:52,685 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:23:52,726 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:23:52,743 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:23:52,743 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:23:52,743 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:23:52,743 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:23:52,743 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:23:52,743 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:23:52,744 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:23:52,744 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:23:52,752 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 53 transitions, 130 flow [2021-05-22 02:23:53,096 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:53,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:53,141 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:53,142 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash 21714732, now seen corresponding path program 1 times [2021-05-22 02:23:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:53,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426847858] [2021-05-22 02:23:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:53,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:53,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426847858] [2021-05-22 02:23:53,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426847858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:53,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:53,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:53,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132086521] [2021-05-22 02:23:53,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:53,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:53,636 INFO L87 Difference]: Start difference. First operand has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:54,116 INFO L93 Difference]: Finished difference Result 5296 states and 14750 transitions. [2021-05-22 02:23:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:23:54,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:54,154 INFO L225 Difference]: With dead ends: 5296 [2021-05-22 02:23:54,154 INFO L226 Difference]: Without dead ends: 5296 [2021-05-22 02:23:54,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-05-22 02:23:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 4137. [2021-05-22 02:23:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4137 states, 4136 states have (on average 2.775386847195358) internal successors, (11479), 4136 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 11479 transitions. [2021-05-22 02:23:54,401 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 11479 transitions. Word has length 48 [2021-05-22 02:23:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:54,402 INFO L482 AbstractCegarLoop]: Abstraction has 4137 states and 11479 transitions. [2021-05-22 02:23:54,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 11479 transitions. [2021-05-22 02:23:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:54,412 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:54,412 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:54,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:23:54,412 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash -929108830, now seen corresponding path program 2 times [2021-05-22 02:23:54,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:54,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809848891] [2021-05-22 02:23:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:54,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:54,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809848891] [2021-05-22 02:23:54,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809848891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:54,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:54,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:54,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514631501] [2021-05-22 02:23:54,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:54,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:54,590 INFO L87 Difference]: Start difference. First operand 4137 states and 11479 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:54,777 INFO L93 Difference]: Finished difference Result 5296 states and 14222 transitions. [2021-05-22 02:23:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:54,800 INFO L225 Difference]: With dead ends: 5296 [2021-05-22 02:23:54,801 INFO L226 Difference]: Without dead ends: 5103 [2021-05-22 02:23:54,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2021-05-22 02:23:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 4184. [2021-05-22 02:23:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4184 states, 4183 states have (on average 2.764044943820225) internal successors, (11562), 4183 states have internal predecessors, (11562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4184 states to 4184 states and 11562 transitions. [2021-05-22 02:23:54,930 INFO L78 Accepts]: Start accepts. Automaton has 4184 states and 11562 transitions. Word has length 48 [2021-05-22 02:23:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:54,931 INFO L482 AbstractCegarLoop]: Abstraction has 4184 states and 11562 transitions. [2021-05-22 02:23:54,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4184 states and 11562 transitions. [2021-05-22 02:23:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:54,940 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:54,940 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:54,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:23:54,940 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1921632898, now seen corresponding path program 3 times [2021-05-22 02:23:54,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:54,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247663898] [2021-05-22 02:23:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:55,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247663898] [2021-05-22 02:23:55,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247663898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:55,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:55,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-22 02:23:55,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452871836] [2021-05-22 02:23:55,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:55,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:55,141 INFO L87 Difference]: Start difference. First operand 4184 states and 11562 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:55,672 INFO L93 Difference]: Finished difference Result 6610 states and 17999 transitions. [2021-05-22 02:23:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:23:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:55,720 INFO L225 Difference]: With dead ends: 6610 [2021-05-22 02:23:55,720 INFO L226 Difference]: Without dead ends: 6580 [2021-05-22 02:23:55,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2021-05-22 02:23:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 4689. [2021-05-22 02:23:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 4688 states have (on average 2.7361348122866893) internal successors, (12827), 4688 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 12827 transitions. [2021-05-22 02:23:55,871 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 12827 transitions. Word has length 48 [2021-05-22 02:23:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:55,871 INFO L482 AbstractCegarLoop]: Abstraction has 4689 states and 12827 transitions. [2021-05-22 02:23:55,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 12827 transitions. [2021-05-22 02:23:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:55,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:55,881 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, 1] [2021-05-22 02:23:55,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:23:55,881 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:55,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1315335104, now seen corresponding path program 4 times [2021-05-22 02:23:55,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:55,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995341419] [2021-05-22 02:23:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:56,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995341419] [2021-05-22 02:23:56,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995341419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:56,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:56,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-22 02:23:56,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372479755] [2021-05-22 02:23:56,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:56,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:56,054 INFO L87 Difference]: Start difference. First operand 4689 states and 12827 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:56,591 INFO L93 Difference]: Finished difference Result 6721 states and 18256 transitions. [2021-05-22 02:23:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:23:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:56,610 INFO L225 Difference]: With dead ends: 6721 [2021-05-22 02:23:56,610 INFO L226 Difference]: Without dead ends: 6721 [2021-05-22 02:23:56,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-05-22 02:23:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 4488. [2021-05-22 02:23:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.74793848896813) internal successors, (12330), 4487 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12330 transitions. [2021-05-22 02:23:56,778 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12330 transitions. Word has length 48 [2021-05-22 02:23:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:56,779 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12330 transitions. [2021-05-22 02:23:56,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12330 transitions. [2021-05-22 02:23:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:56,789 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:56,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:56,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:23:56,790 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:56,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1820845956, now seen corresponding path program 5 times [2021-05-22 02:23:56,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:56,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911737172] [2021-05-22 02:23:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:56,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:56,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911737172] [2021-05-22 02:23:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911737172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:56,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:56,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:56,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629237908] [2021-05-22 02:23:56,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:56,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:56,913 INFO L87 Difference]: Start difference. First operand 4488 states and 12330 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:57,104 INFO L93 Difference]: Finished difference Result 5641 states and 15049 transitions. [2021-05-22 02:23:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:57,115 INFO L225 Difference]: With dead ends: 5641 [2021-05-22 02:23:57,115 INFO L226 Difference]: Without dead ends: 5161 [2021-05-22 02:23:57,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-05-22 02:23:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4243. [2021-05-22 02:23:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4243 states, 4242 states have (on average 2.747053276756247) internal successors, (11653), 4242 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 11653 transitions. [2021-05-22 02:23:57,246 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 11653 transitions. Word has length 48 [2021-05-22 02:23:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:57,246 INFO L482 AbstractCegarLoop]: Abstraction has 4243 states and 11653 transitions. [2021-05-22 02:23:57,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 11653 transitions. [2021-05-22 02:23:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:57,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:57,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:57,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:23:57,256 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1271126176, now seen corresponding path program 6 times [2021-05-22 02:23:57,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:57,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093480176] [2021-05-22 02:23:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093480176] [2021-05-22 02:23:57,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093480176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:57,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:57,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:23:57,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949850451] [2021-05-22 02:23:57,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:23:57,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:57,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:23:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:23:57,276 INFO L87 Difference]: Start difference. First operand 4243 states and 11653 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:57,293 INFO L93 Difference]: Finished difference Result 4195 states and 11359 transitions. [2021-05-22 02:23:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:23:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:57,301 INFO L225 Difference]: With dead ends: 4195 [2021-05-22 02:23:57,301 INFO L226 Difference]: Without dead ends: 4183 [2021-05-22 02:23:57,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:23:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2021-05-22 02:23:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 4183. [2021-05-22 02:23:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.7082735533237687) internal successors, (11326), 4182 states have internal predecessors, (11326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 11326 transitions. [2021-05-22 02:23:57,408 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 11326 transitions. Word has length 48 [2021-05-22 02:23:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:57,409 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 11326 transitions. [2021-05-22 02:23:57,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 11326 transitions. [2021-05-22 02:23:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:57,416 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:57,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:57,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:23:57,416 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -3563124, now seen corresponding path program 7 times [2021-05-22 02:23:57,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:57,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758541612] [2021-05-22 02:23:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:57,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758541612] [2021-05-22 02:23:57,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758541612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:57,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:57,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:57,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346546366] [2021-05-22 02:23:57,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:57,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:57,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:57,536 INFO L87 Difference]: Start difference. First operand 4183 states and 11326 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:57,790 INFO L93 Difference]: Finished difference Result 5052 states and 13458 transitions. [2021-05-22 02:23:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:23:57,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:57,801 INFO L225 Difference]: With dead ends: 5052 [2021-05-22 02:23:57,801 INFO L226 Difference]: Without dead ends: 4789 [2021-05-22 02:23:57,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2021-05-22 02:23:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 4195. [2021-05-22 02:23:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 2.7067238912732474) internal successors, (11352), 4194 states have internal predecessors, (11352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 11352 transitions. [2021-05-22 02:23:57,924 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 11352 transitions. Word has length 48 [2021-05-22 02:23:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:57,924 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 11352 transitions. [2021-05-22 02:23:57,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 11352 transitions. [2021-05-22 02:23:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:57,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:57,931 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:57,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:23:57,932 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:57,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:57,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1405904278, now seen corresponding path program 8 times [2021-05-22 02:23:57,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:57,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046470635] [2021-05-22 02:23:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:58,141 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 02:23:58,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:58,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046470635] [2021-05-22 02:23:58,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046470635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:58,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:58,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-22 02:23:58,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656094864] [2021-05-22 02:23:58,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:58,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:58,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:58,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:58,143 INFO L87 Difference]: Start difference. First operand 4195 states and 11352 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:58,635 INFO L93 Difference]: Finished difference Result 5958 states and 16031 transitions. [2021-05-22 02:23:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:23:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:58,645 INFO L225 Difference]: With dead ends: 5958 [2021-05-22 02:23:58,646 INFO L226 Difference]: Without dead ends: 5195 [2021-05-22 02:23:58,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2021-05-22 02:23:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 4186. [2021-05-22 02:23:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 2.705137395459976) internal successors, (11321), 4185 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 11321 transitions. [2021-05-22 02:23:58,744 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 11321 transitions. Word has length 48 [2021-05-22 02:23:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:58,744 INFO L482 AbstractCegarLoop]: Abstraction has 4186 states and 11321 transitions. [2021-05-22 02:23:58,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 11321 transitions. [2021-05-22 02:23:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:58,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:58,751 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:58,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:23:58,751 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1813768894, now seen corresponding path program 9 times [2021-05-22 02:23:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:58,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037326897] [2021-05-22 02:23:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:58,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037326897] [2021-05-22 02:23:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037326897] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:58,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:58,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:58,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984909961] [2021-05-22 02:23:58,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:58,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:58,890 INFO L87 Difference]: Start difference. First operand 4186 states and 11321 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:59,237 INFO L93 Difference]: Finished difference Result 10394 states and 28527 transitions. [2021-05-22 02:23:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:23:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:59,254 INFO L225 Difference]: With dead ends: 10394 [2021-05-22 02:23:59,255 INFO L226 Difference]: Without dead ends: 10348 [2021-05-22 02:23:59,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10348 states. [2021-05-22 02:23:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10348 to 4829. [2021-05-22 02:23:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 2.714374482187241) internal successors, (13105), 4828 states have internal predecessors, (13105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 13105 transitions. [2021-05-22 02:23:59,416 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 13105 transitions. Word has length 48 [2021-05-22 02:23:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:59,417 INFO L482 AbstractCegarLoop]: Abstraction has 4829 states and 13105 transitions. [2021-05-22 02:23:59,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 13105 transitions. [2021-05-22 02:23:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:23:59,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:59,425 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, 1] [2021-05-22 02:23:59,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:23:59,425 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -962288318, now seen corresponding path program 10 times [2021-05-22 02:23:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:59,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395152215] [2021-05-22 02:23:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:59,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395152215] [2021-05-22 02:23:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395152215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:59,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:59,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:59,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401604321] [2021-05-22 02:23:59,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:59,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:59,562 INFO L87 Difference]: Start difference. First operand 4829 states and 13105 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:59,908 INFO L93 Difference]: Finished difference Result 10579 states and 28918 transitions. [2021-05-22 02:23:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:23:59,908 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:23:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:59,923 INFO L225 Difference]: With dead ends: 10579 [2021-05-22 02:23:59,924 INFO L226 Difference]: Without dead ends: 10116 [2021-05-22 02:23:59,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:23:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-05-22 02:24:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 4940. [2021-05-22 02:24:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4940 states, 4939 states have (on average 2.7064183033002633) internal successors, (13367), 4939 states have internal predecessors, (13367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4940 states to 4940 states and 13367 transitions. [2021-05-22 02:24:00,078 INFO L78 Accepts]: Start accepts. Automaton has 4940 states and 13367 transitions. Word has length 48 [2021-05-22 02:24:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:00,079 INFO L482 AbstractCegarLoop]: Abstraction has 4940 states and 13367 transitions. [2021-05-22 02:24:00,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4940 states and 13367 transitions. [2021-05-22 02:24:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:00,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:00,088 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:00,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:24:00,088 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:00,088 INFO L82 PathProgramCache]: Analyzing trace with hash 556588354, now seen corresponding path program 11 times [2021-05-22 02:24:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:00,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30553606] [2021-05-22 02:24:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:00,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:00,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30553606] [2021-05-22 02:24:00,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30553606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:00,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:00,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-22 02:24:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43388375] [2021-05-22 02:24:00,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:00,317 INFO L87 Difference]: Start difference. First operand 4940 states and 13367 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:00,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:00,886 INFO L93 Difference]: Finished difference Result 10992 states and 28956 transitions. [2021-05-22 02:24:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:24:00,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:00,899 INFO L225 Difference]: With dead ends: 10992 [2021-05-22 02:24:00,899 INFO L226 Difference]: Without dead ends: 10476 [2021-05-22 02:24:00,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:24:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10476 states. [2021-05-22 02:24:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10476 to 5600. [2021-05-22 02:24:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.7051259153420255) internal successors, (15146), 5599 states have internal predecessors, (15146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 15146 transitions. [2021-05-22 02:24:01,050 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 15146 transitions. Word has length 48 [2021-05-22 02:24:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:01,050 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 15146 transitions. [2021-05-22 02:24:01,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 15146 transitions. [2021-05-22 02:24:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:01,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:01,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:01,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:24:01,059 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:01,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1232770074, now seen corresponding path program 12 times [2021-05-22 02:24:01,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:01,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687817070] [2021-05-22 02:24:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:01,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687817070] [2021-05-22 02:24:01,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687817070] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:01,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:01,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:24:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127384134] [2021-05-22 02:24:01,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:01,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:01,192 INFO L87 Difference]: Start difference. First operand 5600 states and 15146 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:01,453 INFO L93 Difference]: Finished difference Result 9309 states and 24818 transitions. [2021-05-22 02:24:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:24:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:01,461 INFO L225 Difference]: With dead ends: 9309 [2021-05-22 02:24:01,462 INFO L226 Difference]: Without dead ends: 8873 [2021-05-22 02:24:01,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8873 states. [2021-05-22 02:24:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8873 to 6236. [2021-05-22 02:24:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6236 states, 6235 states have (on average 2.6882117080994385) internal successors, (16761), 6235 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 16761 transitions. [2021-05-22 02:24:01,616 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 16761 transitions. Word has length 48 [2021-05-22 02:24:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:01,616 INFO L482 AbstractCegarLoop]: Abstraction has 6236 states and 16761 transitions. [2021-05-22 02:24:01,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 16761 transitions. [2021-05-22 02:24:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:01,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:01,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:01,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:24:01,627 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:01,628 INFO L82 PathProgramCache]: Analyzing trace with hash -80771658, now seen corresponding path program 13 times [2021-05-22 02:24:01,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:01,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124308858] [2021-05-22 02:24:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:01,842 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 02:24:01,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:01,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124308858] [2021-05-22 02:24:01,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124308858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:01,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:01,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:24:01,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884695026] [2021-05-22 02:24:01,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:01,846 INFO L87 Difference]: Start difference. First operand 6236 states and 16761 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:02,172 INFO L93 Difference]: Finished difference Result 7152 states and 19114 transitions. [2021-05-22 02:24:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:02,180 INFO L225 Difference]: With dead ends: 7152 [2021-05-22 02:24:02,181 INFO L226 Difference]: Without dead ends: 7152 [2021-05-22 02:24:02,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2021-05-22 02:24:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 6356. [2021-05-22 02:24:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 2.68324154209284) internal successors, (17052), 6355 states have internal predecessors, (17052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 17052 transitions. [2021-05-22 02:24:02,334 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 17052 transitions. Word has length 48 [2021-05-22 02:24:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:02,335 INFO L482 AbstractCegarLoop]: Abstraction has 6356 states and 17052 transitions. [2021-05-22 02:24:02,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 17052 transitions. [2021-05-22 02:24:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:02,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:02,347 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:02,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:24:02,347 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:02,348 INFO L82 PathProgramCache]: Analyzing trace with hash 355340122, now seen corresponding path program 14 times [2021-05-22 02:24:02,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:02,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462077409] [2021-05-22 02:24:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:02,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:02,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462077409] [2021-05-22 02:24:02,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462077409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:02,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:02,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:24:02,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120004184] [2021-05-22 02:24:02,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:02,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:02,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:02,488 INFO L87 Difference]: Start difference. First operand 6356 states and 17052 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:02,797 INFO L93 Difference]: Finished difference Result 7659 states and 20286 transitions. [2021-05-22 02:24:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:24:02,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:02,806 INFO L225 Difference]: With dead ends: 7659 [2021-05-22 02:24:02,806 INFO L226 Difference]: Without dead ends: 7395 [2021-05-22 02:24:02,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7395 states. [2021-05-22 02:24:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7395 to 6236. [2021-05-22 02:24:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6236 states, 6235 states have (on average 2.6843624699278266) internal successors, (16737), 6235 states have internal predecessors, (16737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 16737 transitions. [2021-05-22 02:24:02,942 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 16737 transitions. Word has length 48 [2021-05-22 02:24:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:02,942 INFO L482 AbstractCegarLoop]: Abstraction has 6236 states and 16737 transitions. [2021-05-22 02:24:02,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 16737 transitions. [2021-05-22 02:24:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:02,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:02,950 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:02,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:24:02,950 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:02,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1889183876, now seen corresponding path program 15 times [2021-05-22 02:24:02,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:02,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173763049] [2021-05-22 02:24:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:03,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:03,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173763049] [2021-05-22 02:24:03,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173763049] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:03,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:03,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-22 02:24:03,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982748603] [2021-05-22 02:24:03,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:03,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:03,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:03,134 INFO L87 Difference]: Start difference. First operand 6236 states and 16737 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:03,532 INFO L93 Difference]: Finished difference Result 10117 states and 26888 transitions. [2021-05-22 02:24:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:24:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:03,543 INFO L225 Difference]: With dead ends: 10117 [2021-05-22 02:24:03,543 INFO L226 Difference]: Without dead ends: 10081 [2021-05-22 02:24:03,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10081 states. [2021-05-22 02:24:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10081 to 6383. [2021-05-22 02:24:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6382 states have (on average 2.680664368536509) internal successors, (17108), 6382 states have internal predecessors, (17108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 17108 transitions. [2021-05-22 02:24:03,691 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 17108 transitions. Word has length 48 [2021-05-22 02:24:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:03,691 INFO L482 AbstractCegarLoop]: Abstraction has 6383 states and 17108 transitions. [2021-05-22 02:24:03,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 17108 transitions. [2021-05-22 02:24:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:03,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:03,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:03,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:24:03,700 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1104515038, now seen corresponding path program 16 times [2021-05-22 02:24:03,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:03,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655640509] [2021-05-22 02:24:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:03,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:03,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655640509] [2021-05-22 02:24:03,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655640509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:03,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:03,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:24:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398921816] [2021-05-22 02:24:03,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:03,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:03,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:03,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:03,778 INFO L87 Difference]: Start difference. First operand 6383 states and 17108 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:03,927 INFO L93 Difference]: Finished difference Result 8915 states and 23684 transitions. [2021-05-22 02:24:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:24:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:03,936 INFO L225 Difference]: With dead ends: 8915 [2021-05-22 02:24:03,936 INFO L226 Difference]: Without dead ends: 7926 [2021-05-22 02:24:03,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-05-22 02:24:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 5742. [2021-05-22 02:24:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5742 states, 5741 states have (on average 2.653718864309354) internal successors, (15235), 5741 states have internal predecessors, (15235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5742 states to 5742 states and 15235 transitions. [2021-05-22 02:24:04,058 INFO L78 Accepts]: Start accepts. Automaton has 5742 states and 15235 transitions. Word has length 48 [2021-05-22 02:24:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:04,059 INFO L482 AbstractCegarLoop]: Abstraction has 5742 states and 15235 transitions. [2021-05-22 02:24:04,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5742 states and 15235 transitions. [2021-05-22 02:24:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:04,066 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:04,066 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:04,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:24:04,067 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:04,067 INFO L82 PathProgramCache]: Analyzing trace with hash 271395798, now seen corresponding path program 17 times [2021-05-22 02:24:04,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:04,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938873366] [2021-05-22 02:24:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:04,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938873366] [2021-05-22 02:24:04,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938873366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:04,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:04,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:04,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312704339] [2021-05-22 02:24:04,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:04,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:04,176 INFO L87 Difference]: Start difference. First operand 5742 states and 15235 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:04,420 INFO L93 Difference]: Finished difference Result 6475 states and 17030 transitions. [2021-05-22 02:24:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:24:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:04,425 INFO L225 Difference]: With dead ends: 6475 [2021-05-22 02:24:04,425 INFO L226 Difference]: Without dead ends: 6237 [2021-05-22 02:24:04,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-05-22 02:24:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 5579. [2021-05-22 02:24:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5579 states, 5578 states have (on average 2.6509501613481534) internal successors, (14787), 5578 states have internal predecessors, (14787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5579 states to 5579 states and 14787 transitions. [2021-05-22 02:24:04,556 INFO L78 Accepts]: Start accepts. Automaton has 5579 states and 14787 transitions. Word has length 48 [2021-05-22 02:24:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:04,556 INFO L482 AbstractCegarLoop]: Abstraction has 5579 states and 14787 transitions. [2021-05-22 02:24:04,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5579 states and 14787 transitions. [2021-05-22 02:24:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:04,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:04,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:04,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:24:04,568 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 707507578, now seen corresponding path program 18 times [2021-05-22 02:24:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:04,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160948628] [2021-05-22 02:24:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160948628] [2021-05-22 02:24:04,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160948628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:04,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:04,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:04,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672377855] [2021-05-22 02:24:04,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:04,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:04,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:04,696 INFO L87 Difference]: Start difference. First operand 5579 states and 14787 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:04,981 INFO L93 Difference]: Finished difference Result 6360 states and 16745 transitions. [2021-05-22 02:24:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:24:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:04,986 INFO L225 Difference]: With dead ends: 6360 [2021-05-22 02:24:04,986 INFO L226 Difference]: Without dead ends: 5998 [2021-05-22 02:24:04,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5998 states. [2021-05-22 02:24:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5998 to 5340. [2021-05-22 02:24:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5340 states, 5339 states have (on average 2.6606106012361868) internal successors, (14205), 5339 states have internal predecessors, (14205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5340 states to 5340 states and 14205 transitions. [2021-05-22 02:24:05,062 INFO L78 Accepts]: Start accepts. Automaton has 5340 states and 14205 transitions. Word has length 48 [2021-05-22 02:24:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:05,063 INFO L482 AbstractCegarLoop]: Abstraction has 5340 states and 14205 transitions. [2021-05-22 02:24:05,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5340 states and 14205 transitions. [2021-05-22 02:24:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:05,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:05,069 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, 1] [2021-05-22 02:24:05,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:24:05,070 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1707987518, now seen corresponding path program 19 times [2021-05-22 02:24:05,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:05,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569029841] [2021-05-22 02:24:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:05,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569029841] [2021-05-22 02:24:05,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569029841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:05,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:05,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:05,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323535602] [2021-05-22 02:24:05,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:05,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:05,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:05,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:05,202 INFO L87 Difference]: Start difference. First operand 5340 states and 14205 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:05,427 INFO L93 Difference]: Finished difference Result 6454 states and 16972 transitions. [2021-05-22 02:24:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:24:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:05,434 INFO L225 Difference]: With dead ends: 6454 [2021-05-22 02:24:05,434 INFO L226 Difference]: Without dead ends: 6424 [2021-05-22 02:24:05,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6424 states. [2021-05-22 02:24:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6424 to 5412. [2021-05-22 02:24:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.6579190537793385) internal successors, (14382), 5411 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 14382 transitions. [2021-05-22 02:24:05,506 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 14382 transitions. Word has length 48 [2021-05-22 02:24:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:05,506 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 14382 transitions. [2021-05-22 02:24:05,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 14382 transitions. [2021-05-22 02:24:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:05,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:05,512 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, 1] [2021-05-22 02:24:05,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:24:05,512 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:05,512 INFO L82 PathProgramCache]: Analyzing trace with hash -406719136, now seen corresponding path program 20 times [2021-05-22 02:24:05,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:05,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909894557] [2021-05-22 02:24:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:05,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909894557] [2021-05-22 02:24:05,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909894557] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:05,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:05,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:24:05,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729753928] [2021-05-22 02:24:05,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:05,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:05,598 INFO L87 Difference]: Start difference. First operand 5412 states and 14382 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:05,812 INFO L93 Difference]: Finished difference Result 7894 states and 20847 transitions. [2021-05-22 02:24:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:24:05,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:05,820 INFO L225 Difference]: With dead ends: 7894 [2021-05-22 02:24:05,820 INFO L226 Difference]: Without dead ends: 7798 [2021-05-22 02:24:05,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7798 states. [2021-05-22 02:24:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7798 to 5277. [2021-05-22 02:24:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.6639499620924942) internal successors, (14055), 5276 states have internal predecessors, (14055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 14055 transitions. [2021-05-22 02:24:05,937 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 14055 transitions. Word has length 48 [2021-05-22 02:24:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:05,937 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 14055 transitions. [2021-05-22 02:24:05,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 14055 transitions. [2021-05-22 02:24:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:05,943 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:05,943 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:05,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:24:05,943 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash 994715074, now seen corresponding path program 21 times [2021-05-22 02:24:05,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:05,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180425017] [2021-05-22 02:24:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:05,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180425017] [2021-05-22 02:24:05,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180425017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:05,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:05,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:24:05,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326290153] [2021-05-22 02:24:05,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:24:05,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:24:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:05,958 INFO L87 Difference]: Start difference. First operand 5277 states and 14055 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:05,973 INFO L93 Difference]: Finished difference Result 4552 states and 11743 transitions. [2021-05-22 02:24:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:24:05,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:05,978 INFO L225 Difference]: With dead ends: 4552 [2021-05-22 02:24:05,978 INFO L226 Difference]: Without dead ends: 4418 [2021-05-22 02:24:05,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2021-05-22 02:24:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4370. [2021-05-22 02:24:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4369 states have (on average 2.5934996566720074) internal successors, (11331), 4369 states have internal predecessors, (11331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 11331 transitions. [2021-05-22 02:24:06,054 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 11331 transitions. Word has length 48 [2021-05-22 02:24:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:06,054 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 11331 transitions. [2021-05-22 02:24:06,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 11331 transitions. [2021-05-22 02:24:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:06,059 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:06,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:06,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:24:06,059 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:06,059 INFO L82 PathProgramCache]: Analyzing trace with hash 76293474, now seen corresponding path program 22 times [2021-05-22 02:24:06,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:06,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736369421] [2021-05-22 02:24:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:06,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736369421] [2021-05-22 02:24:06,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736369421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:06,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:06,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:24:06,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146764838] [2021-05-22 02:24:06,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:24:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:06,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:24:06,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:06,078 INFO L87 Difference]: Start difference. First operand 4370 states and 11331 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:06,091 INFO L93 Difference]: Finished difference Result 4250 states and 10780 transitions. [2021-05-22 02:24:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:24:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:06,096 INFO L225 Difference]: With dead ends: 4250 [2021-05-22 02:24:06,096 INFO L226 Difference]: Without dead ends: 4250 [2021-05-22 02:24:06,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:24:06,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2021-05-22 02:24:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 4250. [2021-05-22 02:24:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 2.5370675453047777) internal successors, (10780), 4249 states have internal predecessors, (10780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 10780 transitions. [2021-05-22 02:24:06,164 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 10780 transitions. Word has length 48 [2021-05-22 02:24:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:06,164 INFO L482 AbstractCegarLoop]: Abstraction has 4250 states and 10780 transitions. [2021-05-22 02:24:06,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 10780 transitions. [2021-05-22 02:24:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:06,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:06,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:06,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 02:24:06,170 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1673336162, now seen corresponding path program 23 times [2021-05-22 02:24:06,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:06,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836789865] [2021-05-22 02:24:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:06,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836789865] [2021-05-22 02:24:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836789865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:06,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:24:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547409099] [2021-05-22 02:24:06,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:06,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:06,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:06,236 INFO L87 Difference]: Start difference. First operand 4250 states and 10780 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:06,376 INFO L93 Difference]: Finished difference Result 4826 states and 12069 transitions. [2021-05-22 02:24:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:06,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:06,382 INFO L225 Difference]: With dead ends: 4826 [2021-05-22 02:24:06,382 INFO L226 Difference]: Without dead ends: 4486 [2021-05-22 02:24:06,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-05-22 02:24:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4162. [2021-05-22 02:24:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 2.5231915404950733) internal successors, (10499), 4161 states have internal predecessors, (10499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 10499 transitions. [2021-05-22 02:24:06,456 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 10499 transitions. Word has length 48 [2021-05-22 02:24:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:06,456 INFO L482 AbstractCegarLoop]: Abstraction has 4162 states and 10499 transitions. [2021-05-22 02:24:06,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 10499 transitions. [2021-05-22 02:24:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:06,461 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:06,461 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, 1] [2021-05-22 02:24:06,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 02:24:06,461 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:06,462 INFO L82 PathProgramCache]: Analyzing trace with hash -869937714, now seen corresponding path program 24 times [2021-05-22 02:24:06,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:06,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927105787] [2021-05-22 02:24:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:06,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927105787] [2021-05-22 02:24:06,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927105787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:06,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:06,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:06,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020522273] [2021-05-22 02:24:06,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:06,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:06,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:06,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:06,567 INFO L87 Difference]: Start difference. First operand 4162 states and 10499 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:06,842 INFO L93 Difference]: Finished difference Result 6178 states and 15407 transitions. [2021-05-22 02:24:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:24:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:06,847 INFO L225 Difference]: With dead ends: 6178 [2021-05-22 02:24:06,847 INFO L226 Difference]: Without dead ends: 6020 [2021-05-22 02:24:06,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2021-05-22 02:24:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 4186. [2021-05-22 02:24:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 2.521624850657109) internal successors, (10553), 4185 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 10553 transitions. [2021-05-22 02:24:06,951 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 10553 transitions. Word has length 48 [2021-05-22 02:24:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:06,951 INFO L482 AbstractCegarLoop]: Abstraction has 4186 states and 10553 transitions. [2021-05-22 02:24:06,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 10553 transitions. [2021-05-22 02:24:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:06,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:06,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:06,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 02:24:06,955 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:06,956 INFO L82 PathProgramCache]: Analyzing trace with hash -221230618, now seen corresponding path program 25 times [2021-05-22 02:24:06,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:06,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574458714] [2021-05-22 02:24:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:07,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574458714] [2021-05-22 02:24:07,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574458714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:07,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:07,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:07,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576546652] [2021-05-22 02:24:07,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:07,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:07,062 INFO L87 Difference]: Start difference. First operand 4186 states and 10553 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:07,237 INFO L93 Difference]: Finished difference Result 6074 states and 15232 transitions. [2021-05-22 02:24:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:07,244 INFO L225 Difference]: With dead ends: 6074 [2021-05-22 02:24:07,244 INFO L226 Difference]: Without dead ends: 6010 [2021-05-22 02:24:07,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2021-05-22 02:24:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 4817. [2021-05-22 02:24:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 2.514950166112957) internal successors, (12112), 4816 states have internal predecessors, (12112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 12112 transitions. [2021-05-22 02:24:07,353 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 12112 transitions. Word has length 48 [2021-05-22 02:24:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:07,353 INFO L482 AbstractCegarLoop]: Abstraction has 4817 states and 12112 transitions. [2021-05-22 02:24:07,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 12112 transitions. [2021-05-22 02:24:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:07,359 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:07,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:07,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:24:07,360 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash 773664548, now seen corresponding path program 26 times [2021-05-22 02:24:07,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:07,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285452093] [2021-05-22 02:24:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:07,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285452093] [2021-05-22 02:24:07,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285452093] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:07,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:07,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:07,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125301658] [2021-05-22 02:24:07,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:07,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:07,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:07,475 INFO L87 Difference]: Start difference. First operand 4817 states and 12112 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:07,639 INFO L93 Difference]: Finished difference Result 5483 states and 13653 transitions. [2021-05-22 02:24:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:07,645 INFO L225 Difference]: With dead ends: 5483 [2021-05-22 02:24:07,646 INFO L226 Difference]: Without dead ends: 5285 [2021-05-22 02:24:07,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-05-22 02:24:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 4721. [2021-05-22 02:24:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 2.510593220338983) internal successors, (11850), 4720 states have internal predecessors, (11850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 11850 transitions. [2021-05-22 02:24:07,730 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 11850 transitions. Word has length 48 [2021-05-22 02:24:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:07,731 INFO L482 AbstractCegarLoop]: Abstraction has 4721 states and 11850 transitions. [2021-05-22 02:24:07,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 11850 transitions. [2021-05-22 02:24:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:07,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:07,736 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:07,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 02:24:07,736 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -458909894, now seen corresponding path program 27 times [2021-05-22 02:24:07,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:07,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401362739] [2021-05-22 02:24:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401362739] [2021-05-22 02:24:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401362739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:07,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:07,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:24:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107735624] [2021-05-22 02:24:07,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:07,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:07,807 INFO L87 Difference]: Start difference. First operand 4721 states and 11850 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:07,949 INFO L93 Difference]: Finished difference Result 5071 states and 12592 transitions. [2021-05-22 02:24:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:07,956 INFO L225 Difference]: With dead ends: 5071 [2021-05-22 02:24:07,956 INFO L226 Difference]: Without dead ends: 4977 [2021-05-22 02:24:07,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2021-05-22 02:24:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4701. [2021-05-22 02:24:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4700 states have (on average 2.5063829787234044) internal successors, (11780), 4700 states have internal predecessors, (11780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 11780 transitions. [2021-05-22 02:24:08,036 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 11780 transitions. Word has length 48 [2021-05-22 02:24:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:08,037 INFO L482 AbstractCegarLoop]: Abstraction has 4701 states and 11780 transitions. [2021-05-22 02:24:08,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 11780 transitions. [2021-05-22 02:24:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:08,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:08,043 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:08,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 02:24:08,043 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:08,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1054099754, now seen corresponding path program 28 times [2021-05-22 02:24:08,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:08,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107228824] [2021-05-22 02:24:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:08,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107228824] [2021-05-22 02:24:08,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107228824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:08,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:08,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:08,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410515612] [2021-05-22 02:24:08,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:08,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:08,119 INFO L87 Difference]: Start difference. First operand 4701 states and 11780 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:08,269 INFO L93 Difference]: Finished difference Result 5012 states and 12428 transitions. [2021-05-22 02:24:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:24:08,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:08,274 INFO L225 Difference]: With dead ends: 5012 [2021-05-22 02:24:08,274 INFO L226 Difference]: Without dead ends: 4956 [2021-05-22 02:24:08,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-05-22 02:24:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 4626. [2021-05-22 02:24:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4625 states have (on average 2.4966486486486485) internal successors, (11547), 4625 states have internal predecessors, (11547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 11547 transitions. [2021-05-22 02:24:08,354 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 11547 transitions. Word has length 48 [2021-05-22 02:24:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:08,354 INFO L482 AbstractCegarLoop]: Abstraction has 4626 states and 11547 transitions. [2021-05-22 02:24:08,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 11547 transitions. [2021-05-22 02:24:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:08,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:08,360 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, 1] [2021-05-22 02:24:08,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 02:24:08,361 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1231787908, now seen corresponding path program 29 times [2021-05-22 02:24:08,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:08,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633946097] [2021-05-22 02:24:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:08,454 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 02:24:08,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633946097] [2021-05-22 02:24:08,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633946097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:08,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:08,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:08,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803221008] [2021-05-22 02:24:08,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:08,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:08,456 INFO L87 Difference]: Start difference. First operand 4626 states and 11547 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:08,654 INFO L93 Difference]: Finished difference Result 5161 states and 12755 transitions. [2021-05-22 02:24:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:08,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:08,659 INFO L225 Difference]: With dead ends: 5161 [2021-05-22 02:24:08,659 INFO L226 Difference]: Without dead ends: 5097 [2021-05-22 02:24:08,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-05-22 02:24:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 4562. [2021-05-22 02:24:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.4930936198202147) internal successors, (11371), 4561 states have internal predecessors, (11371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 11371 transitions. [2021-05-22 02:24:08,743 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 11371 transitions. Word has length 48 [2021-05-22 02:24:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:08,743 INFO L482 AbstractCegarLoop]: Abstraction has 4562 states and 11371 transitions. [2021-05-22 02:24:08,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 11371 transitions. [2021-05-22 02:24:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:08,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:08,751 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:08,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 02:24:08,751 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:08,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2068284222, now seen corresponding path program 30 times [2021-05-22 02:24:08,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:08,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679649216] [2021-05-22 02:24:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:08,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679649216] [2021-05-22 02:24:08,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679649216] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:08,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:08,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:08,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646896656] [2021-05-22 02:24:08,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:08,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:08,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:08,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:08,835 INFO L87 Difference]: Start difference. First operand 4562 states and 11371 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:08,990 INFO L93 Difference]: Finished difference Result 4731 states and 11602 transitions. [2021-05-22 02:24:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:08,996 INFO L225 Difference]: With dead ends: 4731 [2021-05-22 02:24:08,996 INFO L226 Difference]: Without dead ends: 4554 [2021-05-22 02:24:08,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-05-22 02:24:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3648. [2021-05-22 02:24:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3647 states have (on average 2.4798464491362764) internal successors, (9044), 3647 states have internal predecessors, (9044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 9044 transitions. [2021-05-22 02:24:09,066 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 9044 transitions. Word has length 48 [2021-05-22 02:24:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,066 INFO L482 AbstractCegarLoop]: Abstraction has 3648 states and 9044 transitions. [2021-05-22 02:24:09,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 9044 transitions. [2021-05-22 02:24:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:09,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:09,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 02:24:09,071 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1838280150, now seen corresponding path program 31 times [2021-05-22 02:24:09,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:09,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061349088] [2021-05-22 02:24:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061349088] [2021-05-22 02:24:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061349088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:09,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:09,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560341851] [2021-05-22 02:24:09,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:09,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:09,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:09,140 INFO L87 Difference]: Start difference. First operand 3648 states and 9044 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:09,268 INFO L93 Difference]: Finished difference Result 4584 states and 11250 transitions. [2021-05-22 02:24:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:09,273 INFO L225 Difference]: With dead ends: 4584 [2021-05-22 02:24:09,273 INFO L226 Difference]: Without dead ends: 4534 [2021-05-22 02:24:09,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-05-22 02:24:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3646. [2021-05-22 02:24:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 2.4790123456790125) internal successors, (9036), 3645 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 9036 transitions. [2021-05-22 02:24:09,340 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 9036 transitions. Word has length 48 [2021-05-22 02:24:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,340 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 9036 transitions. [2021-05-22 02:24:09,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 9036 transitions. [2021-05-22 02:24:09,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:09,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:09,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 02:24:09,344 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:09,345 INFO L82 PathProgramCache]: Analyzing trace with hash -163243666, now seen corresponding path program 32 times [2021-05-22 02:24:09,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:09,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365060983] [2021-05-22 02:24:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:09,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365060983] [2021-05-22 02:24:09,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365060983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:09,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:09,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:24:09,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529669615] [2021-05-22 02:24:09,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:09,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:09,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:09,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:09,405 INFO L87 Difference]: Start difference. First operand 3646 states and 9036 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:09,530 INFO L93 Difference]: Finished difference Result 4172 states and 10205 transitions. [2021-05-22 02:24:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:09,535 INFO L225 Difference]: With dead ends: 4172 [2021-05-22 02:24:09,535 INFO L226 Difference]: Without dead ends: 3835 [2021-05-22 02:24:09,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-05-22 02:24:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3521. [2021-05-22 02:24:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3521 states, 3520 states have (on average 2.4607954545454547) internal successors, (8662), 3520 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3521 states to 3521 states and 8662 transitions. [2021-05-22 02:24:09,577 INFO L78 Accepts]: Start accepts. Automaton has 3521 states and 8662 transitions. Word has length 48 [2021-05-22 02:24:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,577 INFO L482 AbstractCegarLoop]: Abstraction has 3521 states and 8662 transitions. [2021-05-22 02:24:09,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3521 states and 8662 transitions. [2021-05-22 02:24:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:09,580 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,580 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:09,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 02:24:09,580 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:09,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1076849684, now seen corresponding path program 33 times [2021-05-22 02:24:09,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:09,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043593479] [2021-05-22 02:24:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043593479] [2021-05-22 02:24:09,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043593479] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:09,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:09,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:09,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108469497] [2021-05-22 02:24:09,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:09,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:09,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:09,680 INFO L87 Difference]: Start difference. First operand 3521 states and 8662 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:09,901 INFO L93 Difference]: Finished difference Result 5134 states and 12499 transitions. [2021-05-22 02:24:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:09,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:09,906 INFO L225 Difference]: With dead ends: 5134 [2021-05-22 02:24:09,906 INFO L226 Difference]: Without dead ends: 4828 [2021-05-22 02:24:09,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-05-22 02:24:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 3954. [2021-05-22 02:24:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.437136352137617) internal successors, (9634), 3953 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9634 transitions. [2021-05-22 02:24:09,980 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9634 transitions. Word has length 48 [2021-05-22 02:24:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,981 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9634 transitions. [2021-05-22 02:24:09,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9634 transitions. [2021-05-22 02:24:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:09,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,985 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:09,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 02:24:09,985 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash 527044882, now seen corresponding path program 34 times [2021-05-22 02:24:09,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:09,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577004518] [2021-05-22 02:24:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:10,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577004518] [2021-05-22 02:24:10,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577004518] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:10,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:10,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:10,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364408937] [2021-05-22 02:24:10,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:10,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:10,088 INFO L87 Difference]: Start difference. First operand 3954 states and 9634 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:10,256 INFO L93 Difference]: Finished difference Result 4539 states and 10974 transitions. [2021-05-22 02:24:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:10,260 INFO L225 Difference]: With dead ends: 4539 [2021-05-22 02:24:10,260 INFO L226 Difference]: Without dead ends: 4187 [2021-05-22 02:24:10,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2021-05-22 02:24:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3627. [2021-05-22 02:24:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.4332597904026474) internal successors, (8823), 3626 states have internal predecessors, (8823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 8823 transitions. [2021-05-22 02:24:10,304 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 8823 transitions. Word has length 48 [2021-05-22 02:24:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:10,304 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 8823 transitions. [2021-05-22 02:24:10,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 8823 transitions. [2021-05-22 02:24:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:10,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:10,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:10,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 02:24:10,307 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1279163436, now seen corresponding path program 35 times [2021-05-22 02:24:10,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:10,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898120323] [2021-05-22 02:24:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:10,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898120323] [2021-05-22 02:24:10,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898120323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:10,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:10,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:10,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316843954] [2021-05-22 02:24:10,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:10,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:10,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:10,418 INFO L87 Difference]: Start difference. First operand 3627 states and 8823 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:10,603 INFO L93 Difference]: Finished difference Result 4198 states and 10112 transitions. [2021-05-22 02:24:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:10,607 INFO L225 Difference]: With dead ends: 4198 [2021-05-22 02:24:10,607 INFO L226 Difference]: Without dead ends: 3945 [2021-05-22 02:24:10,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2021-05-22 02:24:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3587. [2021-05-22 02:24:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.4121583937534856) internal successors, (8650), 3586 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 8650 transitions. [2021-05-22 02:24:10,667 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 8650 transitions. Word has length 48 [2021-05-22 02:24:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:10,667 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 8650 transitions. [2021-05-22 02:24:10,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 8650 transitions. [2021-05-22 02:24:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:10,671 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:10,671 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:10,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 02:24:10,671 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:10,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1828968238, now seen corresponding path program 36 times [2021-05-22 02:24:10,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:10,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788182312] [2021-05-22 02:24:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:10,771 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 02:24:10,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788182312] [2021-05-22 02:24:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788182312] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:10,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:10,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:24:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243215573] [2021-05-22 02:24:10,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:10,773 INFO L87 Difference]: Start difference. First operand 3587 states and 8650 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:10,931 INFO L93 Difference]: Finished difference Result 3868 states and 9238 transitions. [2021-05-22 02:24:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:10,933 INFO L225 Difference]: With dead ends: 3868 [2021-05-22 02:24:10,933 INFO L226 Difference]: Without dead ends: 3069 [2021-05-22 02:24:10,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-05-22 02:24:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2756. [2021-05-22 02:24:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 2.3731397459165153) internal successors, (6538), 2755 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 6538 transitions. [2021-05-22 02:24:10,965 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 6538 transitions. Word has length 48 [2021-05-22 02:24:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:10,965 INFO L482 AbstractCegarLoop]: Abstraction has 2756 states and 6538 transitions. [2021-05-22 02:24:10,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 6538 transitions. [2021-05-22 02:24:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:10,967 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:10,968 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, 1] [2021-05-22 02:24:10,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 02:24:10,968 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1684872736, now seen corresponding path program 37 times [2021-05-22 02:24:10,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:10,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999742196] [2021-05-22 02:24:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:11,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999742196] [2021-05-22 02:24:11,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999742196] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:11,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:11,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-22 02:24:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531970173] [2021-05-22 02:24:11,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:11,109 INFO L87 Difference]: Start difference. First operand 2756 states and 6538 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:11,434 INFO L93 Difference]: Finished difference Result 3824 states and 8912 transitions. [2021-05-22 02:24:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:24:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:11,437 INFO L225 Difference]: With dead ends: 3824 [2021-05-22 02:24:11,437 INFO L226 Difference]: Without dead ends: 3670 [2021-05-22 02:24:11,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-05-22 02:24:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2683. [2021-05-22 02:24:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2682 states have (on average 2.3732289336316184) internal successors, (6365), 2682 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 6365 transitions. [2021-05-22 02:24:11,477 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 6365 transitions. Word has length 48 [2021-05-22 02:24:11,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:11,477 INFO L482 AbstractCegarLoop]: Abstraction has 2683 states and 6365 transitions. [2021-05-22 02:24:11,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 6365 transitions. [2021-05-22 02:24:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:11,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:11,480 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:11,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 02:24:11,480 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:11,480 INFO L82 PathProgramCache]: Analyzing trace with hash -567074070, now seen corresponding path program 38 times [2021-05-22 02:24:11,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:11,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600396754] [2021-05-22 02:24:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:11,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600396754] [2021-05-22 02:24:11,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600396754] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:11,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:11,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-22 02:24:11,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628157720] [2021-05-22 02:24:11,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:11,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:11,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:11,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:11,616 INFO L87 Difference]: Start difference. First operand 2683 states and 6365 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:11,895 INFO L93 Difference]: Finished difference Result 3008 states and 7066 transitions. [2021-05-22 02:24:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:11,898 INFO L225 Difference]: With dead ends: 3008 [2021-05-22 02:24:11,898 INFO L226 Difference]: Without dead ends: 2882 [2021-05-22 02:24:11,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-05-22 02:24:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2536. [2021-05-22 02:24:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 2.3846153846153846) internal successors, (6045), 2535 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 6045 transitions. [2021-05-22 02:24:11,946 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 6045 transitions. Word has length 48 [2021-05-22 02:24:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:11,946 INFO L482 AbstractCegarLoop]: Abstraction has 2536 states and 6045 transitions. [2021-05-22 02:24:11,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 6045 transitions. [2021-05-22 02:24:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:11,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:11,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:11,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 02:24:11,948 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1527737234, now seen corresponding path program 39 times [2021-05-22 02:24:11,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:11,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056402766] [2021-05-22 02:24:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056402766] [2021-05-22 02:24:12,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056402766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:12,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:12,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:24:12,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693415938] [2021-05-22 02:24:12,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:12,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:12,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:12,011 INFO L87 Difference]: Start difference. First operand 2536 states and 6045 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,152 INFO L93 Difference]: Finished difference Result 2784 states and 6562 transitions. [2021-05-22 02:24:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,155 INFO L225 Difference]: With dead ends: 2784 [2021-05-22 02:24:12,155 INFO L226 Difference]: Without dead ends: 2272 [2021-05-22 02:24:12,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-05-22 02:24:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1997. [2021-05-22 02:24:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 2.3456913827655312) internal successors, (4682), 1996 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 4682 transitions. [2021-05-22 02:24:12,185 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 4682 transitions. Word has length 48 [2021-05-22 02:24:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,185 INFO L482 AbstractCegarLoop]: Abstraction has 1997 states and 4682 transitions. [2021-05-22 02:24:12,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 4682 transitions. [2021-05-22 02:24:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:12,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,187 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:12,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 02:24:12,188 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1742602862, now seen corresponding path program 40 times [2021-05-22 02:24:12,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457382364] [2021-05-22 02:24:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457382364] [2021-05-22 02:24:12,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457382364] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:12,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:12,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:24:12,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556363893] [2021-05-22 02:24:12,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:12,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:12,248 INFO L87 Difference]: Start difference. First operand 1997 states and 4682 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,374 INFO L93 Difference]: Finished difference Result 1924 states and 4439 transitions. [2021-05-22 02:24:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:12,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,376 INFO L225 Difference]: With dead ends: 1924 [2021-05-22 02:24:12,376 INFO L226 Difference]: Without dead ends: 1708 [2021-05-22 02:24:12,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-05-22 02:24:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1708. [2021-05-22 02:24:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.3134153485647335) internal successors, (3949), 1707 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 3949 transitions. [2021-05-22 02:24:12,393 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 3949 transitions. Word has length 48 [2021-05-22 02:24:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,394 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 3949 transitions. [2021-05-22 02:24:12,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 3949 transitions. [2021-05-22 02:24:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:12,395 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,395 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:12,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 02:24:12,396 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,396 INFO L82 PathProgramCache]: Analyzing trace with hash 668037194, now seen corresponding path program 41 times [2021-05-22 02:24:12,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504722424] [2021-05-22 02:24:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504722424] [2021-05-22 02:24:12,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504722424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:12,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:12,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:24:12,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426441830] [2021-05-22 02:24:12,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:12,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:12,467 INFO L87 Difference]: Start difference. First operand 1708 states and 3949 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,546 INFO L93 Difference]: Finished difference Result 2079 states and 4726 transitions. [2021-05-22 02:24:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:12,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,548 INFO L225 Difference]: With dead ends: 2079 [2021-05-22 02:24:12,548 INFO L226 Difference]: Without dead ends: 1763 [2021-05-22 02:24:12,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-05-22 02:24:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1561. [2021-05-22 02:24:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.2788461538461537) internal successors, (3555), 1560 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 3555 transitions. [2021-05-22 02:24:12,563 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 3555 transitions. Word has length 48 [2021-05-22 02:24:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,563 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 3555 transitions. [2021-05-22 02:24:12,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 3555 transitions. [2021-05-22 02:24:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:12,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,565 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, 1] [2021-05-22 02:24:12,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 02:24:12,565 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash -543361422, now seen corresponding path program 42 times [2021-05-22 02:24:12,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644191288] [2021-05-22 02:24:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644191288] [2021-05-22 02:24:12,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644191288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:12,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:12,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:12,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297787402] [2021-05-22 02:24:12,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:12,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:12,628 INFO L87 Difference]: Start difference. First operand 1561 states and 3555 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,724 INFO L93 Difference]: Finished difference Result 1567 states and 3496 transitions. [2021-05-22 02:24:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:24:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,725 INFO L225 Difference]: With dead ends: 1567 [2021-05-22 02:24:12,725 INFO L226 Difference]: Without dead ends: 1281 [2021-05-22 02:24:12,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-05-22 02:24:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-05-22 02:24:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.2234375) internal successors, (2846), 1280 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 2846 transitions. [2021-05-22 02:24:12,741 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 2846 transitions. Word has length 48 [2021-05-22 02:24:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,741 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 2846 transitions. [2021-05-22 02:24:12,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 2846 transitions. [2021-05-22 02:24:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:12,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:12,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 02:24:12,743 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,743 INFO L82 PathProgramCache]: Analyzing trace with hash 630703062, now seen corresponding path program 43 times [2021-05-22 02:24:12,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130512682] [2021-05-22 02:24:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130512682] [2021-05-22 02:24:12,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130512682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:12,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:12,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:24:12,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311424941] [2021-05-22 02:24:12,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:12,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:12,785 INFO L87 Difference]: Start difference. First operand 1281 states and 2846 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,852 INFO L93 Difference]: Finished difference Result 996 states and 2169 transitions. [2021-05-22 02:24:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,853 INFO L225 Difference]: With dead ends: 996 [2021-05-22 02:24:12,853 INFO L226 Difference]: Without dead ends: 423 [2021-05-22 02:24:12,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-22 02:24:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 363. [2021-05-22 02:24:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.1270718232044197) internal successors, (770), 362 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 770 transitions. [2021-05-22 02:24:12,857 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 770 transitions. Word has length 48 [2021-05-22 02:24:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,857 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 770 transitions. [2021-05-22 02:24:12,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 770 transitions. [2021-05-22 02:24:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:24:12,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,858 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:12,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 02:24:12,858 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,859 INFO L82 PathProgramCache]: Analyzing trace with hash -301103428, now seen corresponding path program 44 times [2021-05-22 02:24:12,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64162423] [2021-05-22 02:24:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64162423] [2021-05-22 02:24:12,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64162423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:12,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:12,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:12,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119799683] [2021-05-22 02:24:12,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:12,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:12,942 INFO L87 Difference]: Start difference. First operand 363 states and 770 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:13,051 INFO L93 Difference]: Finished difference Result 343 states and 732 transitions. [2021-05-22 02:24:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:24:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-05-22 02:24:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:13,051 INFO L225 Difference]: With dead ends: 343 [2021-05-22 02:24:13,051 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 02:24:13,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 02:24:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 02:24:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 02:24:13,052 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2021-05-22 02:24:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:13,052 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 02:24:13,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 02:24:13,052 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:24:13,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 02:24:13,053 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 02:24:13,054 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 02:24:13,054 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:24:13,054 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:24:13,054 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:24:13,054 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:24:13,054 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:24:13,054 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:24:13,054 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:24:13,055 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:24:13,056 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 53 transitions, 130 flow [2021-05-22 02:24:13,133 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,149 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:24:13,149 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 02:24:13,149 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:24:13,152 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:24:13 BasicIcfg [2021-05-22 02:24:13,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:24:13,152 INFO L168 Benchmark]: Toolchain (without parser) took 20855.53 ms. Allocated memory was 373.3 MB in the beginning and 870.3 MB in the end (delta: 497.0 MB). Free memory was 352.8 MB in the beginning and 474.6 MB in the end (delta: -121.8 MB). Peak memory consumption was 375.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:24:13,152 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 373.3 MB. Free memory was 354.0 MB in the beginning and 353.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:24:13,152 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.12 ms. Allocated memory is still 373.3 MB. Free memory was 352.7 MB in the beginning and 351.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:24:13,152 INFO L168 Benchmark]: Boogie Preprocessor took 30.76 ms. Allocated memory is still 373.3 MB. Free memory was 351.2 MB in the beginning and 350.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:24:13,153 INFO L168 Benchmark]: RCFGBuilder took 275.48 ms. Allocated memory is still 373.3 MB. Free memory was 350.1 MB in the beginning and 336.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:24:13,153 INFO L168 Benchmark]: TraceAbstraction took 20511.58 ms. Allocated memory was 373.3 MB in the beginning and 870.3 MB in the end (delta: 497.0 MB). Free memory was 335.9 MB in the beginning and 474.6 MB in the end (delta: -138.7 MB). Peak memory consumption was 358.5 MB. Max. memory is 16.0 GB. [2021-05-22 02:24:13,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 373.3 MB. Free memory was 354.0 MB in the beginning and 353.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.12 ms. Allocated memory is still 373.3 MB. Free memory was 352.7 MB in the beginning and 351.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.76 ms. Allocated memory is still 373.3 MB. Free memory was 351.2 MB in the beginning and 350.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 275.48 ms. Allocated memory is still 373.3 MB. Free memory was 350.1 MB in the beginning and 336.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 20511.58 ms. Allocated memory was 373.3 MB in the beginning and 870.3 MB in the end (delta: 497.0 MB). Free memory was 335.9 MB in the beginning and 474.6 MB in the end (delta: -138.7 MB). Peak memory consumption was 358.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 82]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 99 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20311.7ms, OverallIterations: 44, TraceHistogramMax: 1, EmptinessCheckTime: 287.4ms, AutomataDifference: 10450.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 352.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4543 SDtfs, 8036 SDslu, 18000 SDs, 0 SdLazy, 10928 SolverSat, 1866 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5489.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 574 GetRequests, 68 SyntacticMatches, 28 SemanticMatches, 478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 5093.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6383occurred in iteration=15, InterpolantAutomatonStates: 466, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4013.6ms AutomataMinimizationTime, 44 MinimizatonAttempts, 50804 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 59.6ms SsaConstructionTime, 362.4ms SatisfiabilityAnalysisTime, 4475.5ms InterpolantComputationTime, 2112 NumberOfCodeBlocks, 2112 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2068 ConstructedInterpolants, 0 QuantifiedInterpolants, 12895 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 44 InterpolantComputations, 44 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 99 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 94.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 15.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3171occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...