/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/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:24:59,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:24:59,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:24:59,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:24:59,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:24:59,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:24:59,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:24:59,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:24:59,196 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:24:59,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:24:59,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:24:59,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:24:59,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:24:59,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:24:59,198 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:24:59,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:24:59,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:24:59,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:24:59,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:24:59,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:24:59,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:24:59,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:24:59,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:24:59,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:24:59,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:24:59,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:24:59,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:24:59,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:24:59,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:24:59,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:24:59,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:24:59,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:24:59,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:24:59,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:24:59,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:24:59,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:24:59,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:24:59,202 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:24:59,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:24:59,203 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:24:59,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:24:59,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:24:59,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:24:59,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:24:59,501 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:24:59,502 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:24:59,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2021-05-22 02:24:59,503 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-05-22 02:24:59,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:24:59,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:24:59,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:24:59,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:24:59,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:24:59,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:24:59,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:24:59,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:24:59,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:24:59,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... [2021-05-22 02:24:59,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:24:59,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:24:59,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:24:59,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:24:59,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:24:59,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:24:59,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:24:59,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:24:59,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:24:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:24:59,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:24:59,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:24:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:24:59,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:24:59,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:24:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:24:59,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:24:59,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:24:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:24:59,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:24:59,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-22 02:24:59,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-22 02:24:59,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-22 02:24:59,708 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:24:59,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:24:59,954 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:24:59,955 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:24:59 BoogieIcfgContainer [2021-05-22 02:24:59,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:24:59,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:24:59,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:24:59,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:24:59,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:24:59" (1/2) ... [2021-05-22 02:24:59,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34604c8d and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:24:59, skipping insertion in model container [2021-05-22 02:24:59,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:24:59" (2/2) ... [2021-05-22 02:24:59,975 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-05-22 02:24:59,980 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:24:59,980 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:24:59,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:24:59,981 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:25:00,072 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-05-22 02:25:00,090 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:25:00,107 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:25:00,107 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:25:00,108 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:25:00,108 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:25:00,108 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:25:00,108 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:25:00,108 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:25:00,108 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:25:00,124 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-05-22 02:25:00,589 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:25:00,683 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:00,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:00,684 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-05-22 02:25:00,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:00,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749888040] [2021-05-22 02:25:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:00,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:00,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749888040] [2021-05-22 02:25:00,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749888040] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:00,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:00,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:25:00,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903853063] [2021-05-22 02:25:00,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:25:00,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:00,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:25:00,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:00,965 INFO L87 Difference]: Start difference. First operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:01,522 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-05-22 02:25:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:25:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:25:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:01,882 INFO L225 Difference]: With dead ends: 23171 [2021-05-22 02:25:01,882 INFO L226 Difference]: Without dead ends: 15763 [2021-05-22 02:25:01,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-05-22 02:25:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-05-22 02:25:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-05-22 02:25:02,594 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-05-22 02:25:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,595 INFO L482 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-05-22 02:25:02,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-05-22 02:25:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:25:02,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,626 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] [2021-05-22 02:25:02,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:25:02,626 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-05-22 02:25:02,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988216147] [2021-05-22 02:25:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988216147] [2021-05-22 02:25:02,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988216147] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:02,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:02,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584166790] [2021-05-22 02:25:02,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:02,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:02,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:02,698 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,946 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-05-22 02:25:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:02,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:25:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,981 INFO L225 Difference]: With dead ends: 9446 [2021-05-22 02:25:02,981 INFO L226 Difference]: Without dead ends: 6583 [2021-05-22 02:25:02,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-05-22 02:25:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-05-22 02:25:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-05-22 02:25:03,377 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-05-22 02:25:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,378 INFO L482 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-05-22 02:25:03,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-05-22 02:25:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:25:03,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:25:03,405 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-05-22 02:25:03,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7906438] [2021-05-22 02:25:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7906438] [2021-05-22 02:25:03,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7906438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:25:03,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886486476] [2021-05-22 02:25:03,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:25:03,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:25:03,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:03,471 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,807 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-05-22 02:25:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:25:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:25:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,905 INFO L225 Difference]: With dead ends: 22801 [2021-05-22 02:25:03,905 INFO L226 Difference]: Without dead ends: 16593 [2021-05-22 02:25:03,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-05-22 02:25:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-05-22 02:25:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-05-22 02:25:04,354 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-05-22 02:25:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,355 INFO L482 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-05-22 02:25:04,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-05-22 02:25:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:25:04,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:04,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:25:04,444 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-05-22 02:25:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:04,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188559493] [2021-05-22 02:25:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:04,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188559493] [2021-05-22 02:25:04,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188559493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:04,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:04,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128520185] [2021-05-22 02:25:04,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:04,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:04,495 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:04,554 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-05-22 02:25:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:25:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:04,583 INFO L225 Difference]: With dead ends: 8424 [2021-05-22 02:25:04,583 INFO L226 Difference]: Without dead ends: 6361 [2021-05-22 02:25:04,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-05-22 02:25:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-05-22 02:25:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-05-22 02:25:04,887 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-05-22 02:25:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,888 INFO L482 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-05-22 02:25:04,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-05-22 02:25:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:04,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,931 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] [2021-05-22 02:25:04,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:25:04,931 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:04,932 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-05-22 02:25:04,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:04,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483924349] [2021-05-22 02:25:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:05,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483924349] [2021-05-22 02:25:05,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483924349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106655776] [2021-05-22 02:25:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:25:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106655776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:05,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-22 02:25:05,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470559038] [2021-05-22 02:25:05,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:25:05,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:05,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:25:05,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:05,333 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:05,550 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-05-22 02:25:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:25:05,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:05,625 INFO L225 Difference]: With dead ends: 13742 [2021-05-22 02:25:05,625 INFO L226 Difference]: Without dead ends: 13742 [2021-05-22 02:25:05,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-05-22 02:25:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-05-22 02:25:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-05-22 02:25:06,038 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-05-22 02:25:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:06,038 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-05-22 02:25:06,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-05-22 02:25:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:06,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:06,064 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:06,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:06,289 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-05-22 02:25:06,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:06,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498537965] [2021-05-22 02:25:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:06,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498537965] [2021-05-22 02:25:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498537965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:06,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602321694] [2021-05-22 02:25:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:25:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602321694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:06,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-22 02:25:06,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-05-22 02:25:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29254762] [2021-05-22 02:25:06,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:06,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:06,546 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:06,757 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-05-22 02:25:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:06,798 INFO L225 Difference]: With dead ends: 11412 [2021-05-22 02:25:06,798 INFO L226 Difference]: Without dead ends: 11118 [2021-05-22 02:25:06,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-05-22 02:25:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-05-22 02:25:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-05-22 02:25:07,090 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-05-22 02:25:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:07,090 INFO L482 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-05-22 02:25:07,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-05-22 02:25:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:07,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:07,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:07,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:07,313 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2069837256, now seen corresponding path program 1 times [2021-05-22 02:25:07,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:07,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699850927] [2021-05-22 02:25:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:07,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:07,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699850927] [2021-05-22 02:25:07,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699850927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:07,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:07,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:07,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217012529] [2021-05-22 02:25:07,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:07,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:07,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:07,369 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:07,493 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-05-22 02:25:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:07,673 INFO L225 Difference]: With dead ends: 15516 [2021-05-22 02:25:07,674 INFO L226 Difference]: Without dead ends: 15386 [2021-05-22 02:25:07,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-05-22 02:25:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-05-22 02:25:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-05-22 02:25:08,053 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-05-22 02:25:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:08,053 INFO L482 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-05-22 02:25:08,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-05-22 02:25:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:08,080 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:08,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:08,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:25:08,081 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:08,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-05-22 02:25:08,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:08,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165689627] [2021-05-22 02:25:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:08,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:08,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165689627] [2021-05-22 02:25:08,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165689627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:08,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:08,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:08,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57066513] [2021-05-22 02:25:08,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:08,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:08,117 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:08,426 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-05-22 02:25:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:08,502 INFO L225 Difference]: With dead ends: 22857 [2021-05-22 02:25:08,502 INFO L226 Difference]: Without dead ends: 22667 [2021-05-22 02:25:08,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-05-22 02:25:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-05-22 02:25:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-05-22 02:25:09,191 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-05-22 02:25:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:09,191 INFO L482 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-05-22 02:25:09,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,192 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-05-22 02:25:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:09,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:09,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:09,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:25:09,229 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-05-22 02:25:09,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583761841] [2021-05-22 02:25:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:09,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583761841] [2021-05-22 02:25:09,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583761841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207704397] [2021-05-22 02:25:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:09,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:09,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:09,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:25:09,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207704397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:09,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-05-22 02:25:09,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030304380] [2021-05-22 02:25:09,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:09,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:09,414 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:10,803 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-05-22 02:25:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:25:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:10,990 INFO L225 Difference]: With dead ends: 64631 [2021-05-22 02:25:10,990 INFO L226 Difference]: Without dead ends: 50671 [2021-05-22 02:25:10,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:25:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-05-22 02:25:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-05-22 02:25:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-05-22 02:25:11,947 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-05-22 02:25:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:11,947 INFO L482 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-05-22 02:25:11,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-05-22 02:25:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:11,996 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:11,997 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:12,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:12,213 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-05-22 02:25:12,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:12,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873873802] [2021-05-22 02:25:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:12,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:12,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873873802] [2021-05-22 02:25:12,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873873802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:12,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:12,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:12,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286827827] [2021-05-22 02:25:12,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:12,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:12,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:12,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:12,252 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:12,685 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-05-22 02:25:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:12,778 INFO L225 Difference]: With dead ends: 27166 [2021-05-22 02:25:12,778 INFO L226 Difference]: Without dead ends: 26834 [2021-05-22 02:25:12,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-05-22 02:25:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-05-22 02:25:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-05-22 02:25:13,587 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-05-22 02:25:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,587 INFO L482 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-05-22 02:25:13,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-05-22 02:25:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:13,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,647 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:25:13,647 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1747092604, now seen corresponding path program 2 times [2021-05-22 02:25:13,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687890839] [2021-05-22 02:25:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687890839] [2021-05-22 02:25:13,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687890839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:13,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093942074] [2021-05-22 02:25:13,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:13,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:13,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:13,689 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,850 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-05-22 02:25:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:25:13,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,928 INFO L225 Difference]: With dead ends: 24325 [2021-05-22 02:25:13,929 INFO L226 Difference]: Without dead ends: 24325 [2021-05-22 02:25:13,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-05-22 02:25:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-05-22 02:25:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-05-22 02:25:14,813 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-05-22 02:25:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:14,813 INFO L482 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-05-22 02:25:14,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-05-22 02:25:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:14,859 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:14,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:14,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:25:14,859 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -535896376, now seen corresponding path program 3 times [2021-05-22 02:25:14,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:14,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585979761] [2021-05-22 02:25:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:14,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585979761] [2021-05-22 02:25:14,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585979761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:14,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908298776] [2021-05-22 02:25:14,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:14,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:25:14,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:14,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:25:14,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:15,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908298776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:15,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:15,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-05-22 02:25:15,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583484572] [2021-05-22 02:25:15,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:15,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:15,025 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:16,520 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-05-22 02:25:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:25:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:16,664 INFO L225 Difference]: With dead ends: 67384 [2021-05-22 02:25:16,664 INFO L226 Difference]: Without dead ends: 35063 [2021-05-22 02:25:16,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:25:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-05-22 02:25:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-05-22 02:25:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19352 states, 19351 states have (on average 4.504315022479458) internal successors, (87163), 19351 states have internal predecessors, (87163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-05-22 02:25:17,528 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-05-22 02:25:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:17,528 INFO L482 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-05-22 02:25:17,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-05-22 02:25:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:17,579 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:17,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:17,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:17,793 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-05-22 02:25:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:17,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684305767] [2021-05-22 02:25:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:17,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684305767] [2021-05-22 02:25:17,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684305767] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:17,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:17,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:17,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957202303] [2021-05-22 02:25:17,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:17,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:17,823 INFO L87 Difference]: Start difference. First operand 19352 states and 87163 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:17,961 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-05-22 02:25:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,015 INFO L225 Difference]: With dead ends: 20461 [2021-05-22 02:25:18,016 INFO L226 Difference]: Without dead ends: 19957 [2021-05-22 02:25:18,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-05-22 02:25:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-05-22 02:25:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 4.485086602844336) internal successors, (81050), 18071 states have internal predecessors, (81050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-05-22 02:25:18,401 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-05-22 02:25:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,401 INFO L482 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-05-22 02:25:18,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-05-22 02:25:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:18,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,436 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:25:18,436 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1477081055, now seen corresponding path program 2 times [2021-05-22 02:25:18,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345436044] [2021-05-22 02:25:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345436044] [2021-05-22 02:25:18,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345436044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:25:18,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98906398] [2021-05-22 02:25:18,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:25:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:25:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:18,474 INFO L87 Difference]: Start difference. First operand 18072 states and 81050 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,922 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-05-22 02:25:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:25:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,986 INFO L225 Difference]: With dead ends: 21232 [2021-05-22 02:25:18,986 INFO L226 Difference]: Without dead ends: 20403 [2021-05-22 02:25:18,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-05-22 02:25:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-05-22 02:25:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18470 states, 18469 states have (on average 4.4772321186853645) internal successors, (82690), 18469 states have internal predecessors, (82690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-05-22 02:25:19,479 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-05-22 02:25:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:19,479 INFO L482 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-05-22 02:25:19,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-05-22 02:25:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:25:19,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:19,517 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:19,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:25:19,517 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1538169193, now seen corresponding path program 3 times [2021-05-22 02:25:19,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:19,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57434527] [2021-05-22 02:25:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:19,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:19,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57434527] [2021-05-22 02:25:19,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57434527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:19,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867437400] [2021-05-22 02:25:19,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:19,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:25:19,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:19,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:25:19,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:19,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867437400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:19,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-22 02:25:19,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-05-22 02:25:19,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650333856] [2021-05-22 02:25:19,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:19,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:19,707 INFO L87 Difference]: Start difference. First operand 18470 states and 82690 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:19,848 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-05-22 02:25:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:19,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:25:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:19,902 INFO L225 Difference]: With dead ends: 19318 [2021-05-22 02:25:19,902 INFO L226 Difference]: Without dead ends: 18640 [2021-05-22 02:25:19,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-05-22 02:25:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-05-22 02:25:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13099 states, 13098 states have (on average 4.455183997556879) internal successors, (58354), 13098 states have internal predecessors, (58354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-05-22 02:25:20,376 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-05-22 02:25:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:20,376 INFO L482 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-05-22 02:25:20,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-05-22 02:25:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:25:20,405 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:20,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:20,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:25:20,606 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2116118737, now seen corresponding path program 1 times [2021-05-22 02:25:20,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:20,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000718960] [2021-05-22 02:25:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:20,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:20,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000718960] [2021-05-22 02:25:20,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000718960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:20,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238000479] [2021-05-22 02:25:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:20,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:25:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:20,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238000479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:20,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:20,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-05-22 02:25:20,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23941738] [2021-05-22 02:25:20,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:20,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:20,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:20,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:20,771 INFO L87 Difference]: Start difference. First operand 13099 states and 58354 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:21,537 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-05-22 02:25:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:25:21,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:25:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:21,845 INFO L225 Difference]: With dead ends: 43919 [2021-05-22 02:25:21,845 INFO L226 Difference]: Without dead ends: 24373 [2021-05-22 02:25:21,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:25:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-05-22 02:25:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-05-22 02:25:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 4.517816028944194) internal successors, (41207), 9121 states have internal predecessors, (41207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-05-22 02:25:22,124 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-05-22 02:25:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:22,124 INFO L482 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-05-22 02:25:22,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-05-22 02:25:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:25:22,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:22,141 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] [2021-05-22 02:25:22,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:22,342 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2025680541, now seen corresponding path program 1 times [2021-05-22 02:25:22,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:22,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116627351] [2021-05-22 02:25:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:22,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:22,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116627351] [2021-05-22 02:25:22,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116627351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:22,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545199895] [2021-05-22 02:25:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:25:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:22,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545199895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:22,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:22,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-05-22 02:25:22,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105268476] [2021-05-22 02:25:22,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:22,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:22,591 INFO L87 Difference]: Start difference. First operand 9122 states and 41207 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,088 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-05-22 02:25:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:25:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:25:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,153 INFO L225 Difference]: With dead ends: 33369 [2021-05-22 02:25:24,154 INFO L226 Difference]: Without dead ends: 23102 [2021-05-22 02:25:24,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:25:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-05-22 02:25:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-05-22 02:25:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9972 states, 9971 states have (on average 4.515595226155852) internal successors, (45025), 9971 states have internal predecessors, (45025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-05-22 02:25:24,455 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-05-22 02:25:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,455 INFO L482 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-05-22 02:25:24,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-05-22 02:25:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:25:24,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:24,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:25:24,675 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2081351631, now seen corresponding path program 1 times [2021-05-22 02:25:24,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585398518] [2021-05-22 02:25:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:24,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585398518] [2021-05-22 02:25:24,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585398518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:24,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156504315] [2021-05-22 02:25:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:25:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:24,886 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:25:25,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:25:25,088 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:25:25,090 INFO L168 Benchmark]: Toolchain (without parser) took 25549.13 ms. Allocated memory was 346.0 MB in the beginning and 12.3 GB in the end (delta: 12.0 GB). Free memory was 325.1 MB in the beginning and 10.4 GB in the end (delta: -10.0 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-05-22 02:25:25,090 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 346.0 MB. Free memory is still 326.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:25,090 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.13 ms. Allocated memory is still 346.0 MB. Free memory was 325.1 MB in the beginning and 323.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:25,090 INFO L168 Benchmark]: Boogie Preprocessor took 27.11 ms. Allocated memory is still 346.0 MB. Free memory was 323.6 MB in the beginning and 322.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:25,090 INFO L168 Benchmark]: RCFGBuilder took 360.20 ms. Allocated memory is still 346.0 MB. Free memory was 322.5 MB in the beginning and 309.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:25,092 INFO L168 Benchmark]: TraceAbstraction took 25132.06 ms. Allocated memory was 346.0 MB in the beginning and 12.3 GB in the end (delta: 12.0 GB). Free memory was 309.0 MB in the beginning and 10.4 GB in the end (delta: -10.1 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-05-22 02:25:25,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 346.0 MB. Free memory is still 326.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.13 ms. Allocated memory is still 346.0 MB. Free memory was 325.1 MB in the beginning and 323.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.11 ms. Allocated memory is still 346.0 MB. Free memory was 323.6 MB in the beginning and 322.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 360.20 ms. Allocated memory is still 346.0 MB. Free memory was 322.5 MB in the beginning and 309.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 25132.06 ms. Allocated memory was 346.0 MB in the beginning and 12.3 GB in the end (delta: 12.0 GB). Free memory was 309.0 MB in the beginning and 10.4 GB in the end (delta: -10.1 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...