/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/popl20/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:35:59,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:35:59,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:35:59,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:35:59,163 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 02:35:59,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:35:59,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:35:59,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:35:59,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:35:59,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:35:59,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:35:59,196 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:35:59,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:35:59,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:35:59,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:35:59,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:35:59,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:35:59,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:35:59,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:35:59,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:35:59,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:35:59,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:35:59,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:35:59,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:35:59,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:35:59,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:35:59,199 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:35:59,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:35:59,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:35:59,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:35:59,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:35:59,431 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:35:59,431 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:35:59,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-05-22 02:35:59,432 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-05-22 02:35:59,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:35:59,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:35:59,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:35:59,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:35:59,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:35:59,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:35:59,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:35:59,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:35:59,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:35:59,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/1) ... [2021-05-22 02:35:59,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:35:59,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:35:59,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:35:59,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:35:59,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (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 02:35:59,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:35:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:35:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:35:59,527 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:35:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:35:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:35:59,527 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:35:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:35:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:35:59,527 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:35:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:35:59,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:35:59,528 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:35:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:35:59,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:35:59,528 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 02:35:59,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:35:59,761 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:35:59,762 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:35:59 BoogieIcfgContainer [2021-05-22 02:35:59,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:35:59,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:35:59,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:35:59,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:35:59,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:35:59" (1/2) ... [2021-05-22 02:35:59,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e3b3a7 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:35:59, skipping insertion in model container [2021-05-22 02:35:59,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:35:59" (2/2) ... [2021-05-22 02:35:59,767 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-05-22 02:35:59,770 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:35:59,770 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:35:59,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:35:59,771 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:35:59,813 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-22 02:35:59,827 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:35:59,855 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:35:59,856 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:35:59,856 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:35:59,856 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:35:59,856 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:35:59,856 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:35:59,856 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:35:59,856 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:35:59,862 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-05-22 02:35:59,910 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:35:59,921 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:59,922 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:59,922 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash 187435854, now seen corresponding path program 1 times [2021-05-22 02:35:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:59,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342591162] [2021-05-22 02:35:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:00,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:00,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342591162] [2021-05-22 02:36:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342591162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:00,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:00,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:36:00,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036395395] [2021-05-22 02:36:00,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:36:00,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:36:00,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:36:00,099 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:00,192 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-05-22 02:36:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:36:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:36:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:00,217 INFO L225 Difference]: With dead ends: 1267 [2021-05-22 02:36:00,217 INFO L226 Difference]: Without dead ends: 1056 [2021-05-22 02:36:00,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:36:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-05-22 02:36:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-05-22 02:36:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-05-22 02:36:00,308 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-05-22 02:36:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:00,308 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-05-22 02:36:00,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-05-22 02:36:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:36:00,312 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:00,312 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:00,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:36:00,312 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash 801929296, now seen corresponding path program 1 times [2021-05-22 02:36:00,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:00,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668467371] [2021-05-22 02:36:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:00,361 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 02:36:00,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:00,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668467371] [2021-05-22 02:36:00,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668467371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:00,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:00,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:36:00,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814455168] [2021-05-22 02:36:00,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:36:00,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:00,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:36:00,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:36:00,365 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:00,452 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-05-22 02:36:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:36:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:00,459 INFO L225 Difference]: With dead ends: 1405 [2021-05-22 02:36:00,460 INFO L226 Difference]: Without dead ends: 1369 [2021-05-22 02:36:00,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:36:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-05-22 02:36:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-05-22 02:36:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-05-22 02:36:00,503 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-05-22 02:36:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:00,504 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-05-22 02:36:00,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-05-22 02:36:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:36:00,507 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:00,507 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:00,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:36:00,508 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2091759792, now seen corresponding path program 1 times [2021-05-22 02:36:00,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:00,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13324480] [2021-05-22 02:36:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:00,575 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 02:36:00,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:00,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13324480] [2021-05-22 02:36:00,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13324480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:00,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:00,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:36:00,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421673056] [2021-05-22 02:36:00,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:36:00,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:00,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:36:00,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:36:00,577 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 02:36:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:00,662 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2021-05-22 02:36:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:36:00,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 02:36:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:00,671 INFO L225 Difference]: With dead ends: 1359 [2021-05-22 02:36:00,675 INFO L226 Difference]: Without dead ends: 1327 [2021-05-22 02:36:00,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:36:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-05-22 02:36:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2021-05-22 02:36:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2021-05-22 02:36:00,703 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2021-05-22 02:36:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:00,703 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2021-05-22 02:36:00,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 02:36:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2021-05-22 02:36:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:36:00,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:00,706 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:00,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:36:00,707 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:00,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-05-22 02:36:00,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:00,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574991046] [2021-05-22 02:36:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:00,781 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 02:36:00,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:00,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574991046] [2021-05-22 02:36:00,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574991046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:00,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:00,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:36:00,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610543853] [2021-05-22 02:36:00,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:36:00,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:00,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:36:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:36:00,783 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:00,834 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2021-05-22 02:36:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:36:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:00,839 INFO L225 Difference]: With dead ends: 1126 [2021-05-22 02:36:00,839 INFO L226 Difference]: Without dead ends: 1044 [2021-05-22 02:36:00,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:36:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-05-22 02:36:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2021-05-22 02:36:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2021-05-22 02:36:00,861 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2021-05-22 02:36:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:00,861 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2021-05-22 02:36:00,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2021-05-22 02:36:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:36:00,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:00,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:00,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:36:00,864 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:00,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2011026324, now seen corresponding path program 2 times [2021-05-22 02:36:00,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:00,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832384423] [2021-05-22 02:36:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:00,890 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 02:36:00,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:00,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832384423] [2021-05-22 02:36:00,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832384423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:00,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:00,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:36:00,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774380926] [2021-05-22 02:36:00,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:36:00,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:36:00,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:36:00,892 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 02:36:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:00,941 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2021-05-22 02:36:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:36:00,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 02:36:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:00,947 INFO L225 Difference]: With dead ends: 1296 [2021-05-22 02:36:00,947 INFO L226 Difference]: Without dead ends: 1276 [2021-05-22 02:36:00,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:36:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-05-22 02:36:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2021-05-22 02:36:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-05-22 02:36:00,973 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-05-22 02:36:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:00,973 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-05-22 02:36:00,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 02:36:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-05-22 02:36:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:36:00,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:00,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:00,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:36:00,989 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-05-22 02:36:00,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:00,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286961082] [2021-05-22 02:36:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:01,020 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 02:36:01,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:01,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286961082] [2021-05-22 02:36:01,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286961082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:01,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:01,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:36:01,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117421967] [2021-05-22 02:36:01,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:36:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:01,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:36:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:36:01,022 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) 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 02:36:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:01,083 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-05-22 02:36:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:36:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) 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 02:36:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:01,091 INFO L225 Difference]: With dead ends: 1772 [2021-05-22 02:36:01,091 INFO L226 Difference]: Without dead ends: 1752 [2021-05-22 02:36:01,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:36:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-05-22 02:36:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-05-22 02:36:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-05-22 02:36:01,120 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-05-22 02:36:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:01,120 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-05-22 02:36:01,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) 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 02:36:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-05-22 02:36:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:36:01,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:01,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:01,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:36:01,122 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-05-22 02:36:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:01,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71821315] [2021-05-22 02:36:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:01,158 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 02:36:01,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:01,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71821315] [2021-05-22 02:36:01,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71821315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:01,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:01,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:36:01,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395049261] [2021-05-22 02:36:01,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:36:01,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:36:01,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:36:01,160 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) 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 02:36:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:01,206 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-05-22 02:36:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:36:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) 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 02:36:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:01,211 INFO L225 Difference]: With dead ends: 1137 [2021-05-22 02:36:01,211 INFO L226 Difference]: Without dead ends: 1137 [2021-05-22 02:36:01,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:36:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-05-22 02:36:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-05-22 02:36:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-05-22 02:36:01,232 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-05-22 02:36:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:01,233 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-05-22 02:36:01,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) 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 02:36:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-05-22 02:36:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:36:01,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:01,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:01,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:36:01,235 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:01,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:01,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-05-22 02:36:01,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:01,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909847151] [2021-05-22 02:36:01,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:01,295 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 02:36:01,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909847151] [2021-05-22 02:36:01,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909847151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:01,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391418119] [2021-05-22 02:36:01,296 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 02:36:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:01,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:36:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:01,549 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 02:36:01,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391418119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:01,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:01,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-22 02:36:01,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503018912] [2021-05-22 02:36:01,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:36:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:36:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:36:01,550 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:01,625 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-05-22 02:36:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:36:01,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:36:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:01,631 INFO L225 Difference]: With dead ends: 1388 [2021-05-22 02:36:01,631 INFO L226 Difference]: Without dead ends: 1388 [2021-05-22 02:36:01,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:36:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-05-22 02:36:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-05-22 02:36:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-05-22 02:36:01,655 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-05-22 02:36:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:01,655 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-05-22 02:36:01,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-05-22 02:36:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:36:01,657 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:01,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:01,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-22 02:36:01,869 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-05-22 02:36:01,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:01,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788150382] [2021-05-22 02:36:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:01,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:01,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788150382] [2021-05-22 02:36:01,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788150382] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:01,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:01,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:36:01,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254427809] [2021-05-22 02:36:01,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:36:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:36:01,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:36:01,890 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:01,932 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-05-22 02:36:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:36:01,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:36:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:01,938 INFO L225 Difference]: With dead ends: 1113 [2021-05-22 02:36:01,938 INFO L226 Difference]: Without dead ends: 1113 [2021-05-22 02:36:01,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:36:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-05-22 02:36:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-05-22 02:36:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-05-22 02:36:01,957 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-05-22 02:36:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:01,958 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-05-22 02:36:01,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-05-22 02:36:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:36:01,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:01,960 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:01,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:36:01,960 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:01,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-05-22 02:36:01,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:01,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349500033] [2021-05-22 02:36:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:01,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:01,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349500033] [2021-05-22 02:36:01,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349500033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:01,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587032175] [2021-05-22 02:36:01,999 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 02:36:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:36:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587032175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:02,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:02,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:36:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967349143] [2021-05-22 02:36:02,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:36:02,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:02,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:36:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:36:02,116 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:02,166 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-05-22 02:36:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:36:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:36:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:02,172 INFO L225 Difference]: With dead ends: 1404 [2021-05-22 02:36:02,173 INFO L226 Difference]: Without dead ends: 1404 [2021-05-22 02:36:02,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:36:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-05-22 02:36:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-05-22 02:36:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-05-22 02:36:02,194 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-05-22 02:36:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:02,194 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-05-22 02:36:02,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-05-22 02:36:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:36:02,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:02,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:02,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-22 02:36:02,397 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:02,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-05-22 02:36:02,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:02,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635341129] [2021-05-22 02:36:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:02,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635341129] [2021-05-22 02:36:02,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635341129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92286074] [2021-05-22 02:36:02,430 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 02:36:02,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:36:02,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:36:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:02,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92286074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:02,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-22 02:36:02,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-05-22 02:36:02,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178190665] [2021-05-22 02:36:02,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:36:02,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:02,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:36:02,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:36:02,560 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:02,582 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-05-22 02:36:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:36:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:36:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:02,597 INFO L225 Difference]: With dead ends: 1123 [2021-05-22 02:36:02,598 INFO L226 Difference]: Without dead ends: 1063 [2021-05-22 02:36:02,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:36:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-05-22 02:36:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-05-22 02:36:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-05-22 02:36:02,630 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-05-22 02:36:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:02,630 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-05-22 02:36:02,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-05-22 02:36:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:36:02,632 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:02,632 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:02,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-22 02:36:02,852 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-05-22 02:36:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:02,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571403547] [2021-05-22 02:36:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:02,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571403547] [2021-05-22 02:36:02,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571403547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245983800] [2021-05-22 02:36:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:36:02,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:03,031 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 02:36:03,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245983800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:03,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:03,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-22 02:36:03,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878374338] [2021-05-22 02:36:03,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:36:03,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:03,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:36:03,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:36:03,032 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:03,090 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-05-22 02:36:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:36:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 02:36:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:03,100 INFO L225 Difference]: With dead ends: 3683 [2021-05-22 02:36:03,100 INFO L226 Difference]: Without dead ends: 3245 [2021-05-22 02:36:03,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:36:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-05-22 02:36:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-05-22 02:36:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-05-22 02:36:03,152 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-05-22 02:36:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:03,152 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-05-22 02:36:03,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-05-22 02:36:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:36:03,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:03,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:03,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:03,369 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-05-22 02:36:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:03,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447993636] [2021-05-22 02:36:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:03,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:03,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447993636] [2021-05-22 02:36:03,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447993636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:03,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297263708] [2021-05-22 02:36:03,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:03,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:36:03,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:36:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:03,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297263708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:03,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:03,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-22 02:36:03,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112594701] [2021-05-22 02:36:03,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:36:03,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:36:03,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:36:03,540 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:03,614 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-05-22 02:36:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:36:03,614 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 02:36:03,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:03,627 INFO L225 Difference]: With dead ends: 5705 [2021-05-22 02:36:03,628 INFO L226 Difference]: Without dead ends: 5282 [2021-05-22 02:36:03,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:36:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-05-22 02:36:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-05-22 02:36:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-05-22 02:36:03,697 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-05-22 02:36:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:03,697 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-05-22 02:36:03,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-05-22 02:36:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:36:03,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:03,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:03,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-22 02:36:03,917 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-05-22 02:36:03,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:03,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302615098] [2021-05-22 02:36:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:03,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:03,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302615098] [2021-05-22 02:36:03,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302615098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:03,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341987498] [2021-05-22 02:36:03,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:04,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:36:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:36:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:04,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341987498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:04,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:04,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-22 02:36:04,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575061153] [2021-05-22 02:36:04,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:36:04,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:36:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:36:04,107 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:04,184 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-05-22 02:36:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:36:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 02:36:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:04,197 INFO L225 Difference]: With dead ends: 5724 [2021-05-22 02:36:04,197 INFO L226 Difference]: Without dead ends: 5132 [2021-05-22 02:36:04,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:36:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-05-22 02:36:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-05-22 02:36:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-05-22 02:36:04,261 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-05-22 02:36:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:04,261 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-05-22 02:36:04,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-05-22 02:36:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:36:04,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:04,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:04,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:04,483 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-05-22 02:36:04,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:04,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800756071] [2021-05-22 02:36:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:04,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:04,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800756071] [2021-05-22 02:36:04,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800756071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:04,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842433444] [2021-05-22 02:36:04,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:04,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:36:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:36:04,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842433444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:04,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:04,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:36:04,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800856866] [2021-05-22 02:36:04,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:36:04,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:04,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:36:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:36:04,692 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:04,988 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-05-22 02:36:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:36:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:36:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:05,003 INFO L225 Difference]: With dead ends: 6143 [2021-05-22 02:36:05,003 INFO L226 Difference]: Without dead ends: 6077 [2021-05-22 02:36:05,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:36:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-05-22 02:36:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-05-22 02:36:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-05-22 02:36:05,118 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-05-22 02:36:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:05,118 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-05-22 02:36:05,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-05-22 02:36:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:36:05,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:05,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:05,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:36:05,337 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-05-22 02:36:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:05,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466095921] [2021-05-22 02:36:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:05,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:05,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466095921] [2021-05-22 02:36:05,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466095921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:05,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431963266] [2021-05-22 02:36:05,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:05,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:36:05,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:36:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431963266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:05,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:05,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-22 02:36:05,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155953559] [2021-05-22 02:36:05,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:36:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:36:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:36:05,508 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:05,735 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-05-22 02:36:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:36:05,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:36:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:05,760 INFO L225 Difference]: With dead ends: 10702 [2021-05-22 02:36:05,760 INFO L226 Difference]: Without dead ends: 10294 [2021-05-22 02:36:05,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:36:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-05-22 02:36:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-05-22 02:36:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-05-22 02:36:05,875 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-05-22 02:36:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:05,875 INFO L482 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-05-22 02:36:05,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-05-22 02:36:05,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:36:05,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:05,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:06,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-22 02:36:06,089 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-05-22 02:36:06,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:06,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556452349] [2021-05-22 02:36:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:06,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:06,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556452349] [2021-05-22 02:36:06,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556452349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:06,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717298286] [2021-05-22 02:36:06,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:06,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:36:06,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:06,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:36:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:06,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717298286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:06,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:06,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-22 02:36:06,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286889147] [2021-05-22 02:36:06,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:36:06,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:06,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:36:06,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:36:06,285 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:06,693 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-05-22 02:36:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:36:06,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:36:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:06,710 INFO L225 Difference]: With dead ends: 7423 [2021-05-22 02:36:06,710 INFO L226 Difference]: Without dead ends: 7391 [2021-05-22 02:36:06,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:36:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-05-22 02:36:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-05-22 02:36:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-05-22 02:36:06,820 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-05-22 02:36:06,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:06,820 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-05-22 02:36:06,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-05-22 02:36:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:36:06,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:06,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:07,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:36:07,048 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-05-22 02:36:07,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:07,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269329172] [2021-05-22 02:36:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:07,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:07,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269329172] [2021-05-22 02:36:07,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269329172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:07,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311180911] [2021-05-22 02:36:07,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:36:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:07,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311180911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:07,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:07,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-22 02:36:07,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49315938] [2021-05-22 02:36:07,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:36:07,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:07,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:36:07,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:36:07,319 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:07,829 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-05-22 02:36:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:36:07,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:36:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:07,871 INFO L225 Difference]: With dead ends: 17746 [2021-05-22 02:36:07,871 INFO L226 Difference]: Without dead ends: 17648 [2021-05-22 02:36:07,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 305.1ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:36:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-05-22 02:36:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-05-22 02:36:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-05-22 02:36:08,079 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-05-22 02:36:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:08,080 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-05-22 02:36:08,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-05-22 02:36:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:36:08,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:08,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:08,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:36:08,303 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-05-22 02:36:08,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:08,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976631068] [2021-05-22 02:36:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:08,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:08,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976631068] [2021-05-22 02:36:08,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976631068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:08,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030706641] [2021-05-22 02:36:08,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:08,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:36:08,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:36:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:08,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030706641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:08,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:08,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-22 02:36:08,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883949748] [2021-05-22 02:36:08,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:36:08,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:08,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:36:08,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:36:08,476 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:08,952 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-05-22 02:36:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:36:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:36:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:09,004 INFO L225 Difference]: With dead ends: 21973 [2021-05-22 02:36:09,005 INFO L226 Difference]: Without dead ends: 21443 [2021-05-22 02:36:09,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:36:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-05-22 02:36:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-05-22 02:36:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-05-22 02:36:09,262 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-05-22 02:36:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:09,262 INFO L482 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-05-22 02:36:09,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-05-22 02:36:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:36:09,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:09,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:09,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:09,493 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-05-22 02:36:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:09,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887749324] [2021-05-22 02:36:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:09,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887749324] [2021-05-22 02:36:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887749324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070328022] [2021-05-22 02:36:09,524 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:09,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:36:09,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:36:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:09,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070328022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:09,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:09,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-22 02:36:09,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021144359] [2021-05-22 02:36:09,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:36:09,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:36:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:36:09,721 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:10,224 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-05-22 02:36:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:36:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:36:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:10,260 INFO L225 Difference]: With dead ends: 15939 [2021-05-22 02:36:10,260 INFO L226 Difference]: Without dead ends: 15563 [2021-05-22 02:36:10,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:36:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-05-22 02:36:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-05-22 02:36:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-05-22 02:36:10,556 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-05-22 02:36:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:10,556 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-05-22 02:36:10,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-05-22 02:36:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:36:10,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:10,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:10,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:10,794 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-05-22 02:36:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:10,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371857938] [2021-05-22 02:36:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:10,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371857938] [2021-05-22 02:36:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371857938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792004096] [2021-05-22 02:36:10,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:10,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:36:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:10,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:36:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:11,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792004096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:11,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:11,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-05-22 02:36:11,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223129873] [2021-05-22 02:36:11,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:36:11,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:11,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:36:11,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:36:11,006 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:11,241 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-05-22 02:36:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:36:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:36:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:11,288 INFO L225 Difference]: With dead ends: 17650 [2021-05-22 02:36:11,288 INFO L226 Difference]: Without dead ends: 17578 [2021-05-22 02:36:11,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:36:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-05-22 02:36:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-05-22 02:36:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-05-22 02:36:11,624 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-05-22 02:36:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:11,624 INFO L482 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-05-22 02:36:11,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-05-22 02:36:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:36:11,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:11,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:11,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-22 02:36:11,861 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-05-22 02:36:11,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:11,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227795350] [2021-05-22 02:36:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:36:11,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227795350] [2021-05-22 02:36:11,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227795350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346493636] [2021-05-22 02:36:11,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:11,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:36:11,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:36:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:12,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346493636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:12,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:12,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:36:12,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344674807] [2021-05-22 02:36:12,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:36:12,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:12,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:36:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:36:12,071 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 02:36:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:12,786 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-05-22 02:36:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:36:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 37 [2021-05-22 02:36:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:12,920 INFO L225 Difference]: With dead ends: 47667 [2021-05-22 02:36:12,920 INFO L226 Difference]: Without dead ends: 46072 [2021-05-22 02:36:12,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:36:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-05-22 02:36:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-05-22 02:36:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-05-22 02:36:13,971 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-05-22 02:36:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:13,971 INFO L482 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-05-22 02:36:13,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 02:36:13,971 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-05-22 02:36:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:36:14,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:14,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:14,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:14,227 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-05-22 02:36:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:14,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027277319] [2021-05-22 02:36:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:36:14,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027277319] [2021-05-22 02:36:14,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027277319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446202815] [2021-05-22 02:36:14,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:14,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:36:14,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:14,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:36:14,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:14,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446202815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:14,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:14,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-22 02:36:14,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774690193] [2021-05-22 02:36:14,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:36:14,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:14,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:36:14,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:36:14,477 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:15,020 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-05-22 02:36:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:36:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:36:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:15,141 INFO L225 Difference]: With dead ends: 41877 [2021-05-22 02:36:15,141 INFO L226 Difference]: Without dead ends: 41385 [2021-05-22 02:36:15,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:36:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-05-22 02:36:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-05-22 02:36:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-05-22 02:36:16,019 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-05-22 02:36:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:16,019 INFO L482 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-05-22 02:36:16,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-05-22 02:36:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:36:16,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:16,073 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:16,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-22 02:36:16,285 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-05-22 02:36:16,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:16,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132573779] [2021-05-22 02:36:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:36:16,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:16,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132573779] [2021-05-22 02:36:16,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132573779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:16,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481153880] [2021-05-22 02:36:16,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:16,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:36:16,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:16,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481153880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:16,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:16,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-22 02:36:16,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571448891] [2021-05-22 02:36:16,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:36:16,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:36:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:36:16,433 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:17,070 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-05-22 02:36:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:36:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:36:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:17,246 INFO L225 Difference]: With dead ends: 55329 [2021-05-22 02:36:17,246 INFO L226 Difference]: Without dead ends: 54965 [2021-05-22 02:36:17,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:36:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-05-22 02:36:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-05-22 02:36:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-05-22 02:36:18,465 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-05-22 02:36:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:18,466 INFO L482 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-05-22 02:36:18,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-05-22 02:36:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:36:18,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:18,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:18,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:18,756 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:18,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-05-22 02:36:18,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:18,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991909321] [2021-05-22 02:36:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-22 02:36:18,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:18,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991909321] [2021-05-22 02:36:18,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991909321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:36:18,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:36:18,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:36:18,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188244671] [2021-05-22 02:36:18,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:36:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:36:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:36:18,771 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:19,199 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-05-22 02:36:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:36:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:36:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:19,311 INFO L225 Difference]: With dead ends: 36224 [2021-05-22 02:36:19,311 INFO L226 Difference]: Without dead ends: 36156 [2021-05-22 02:36:19,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:36:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-05-22 02:36:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-05-22 02:36:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-05-22 02:36:20,176 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-05-22 02:36:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:20,176 INFO L482 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-05-22 02:36:20,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-05-22 02:36:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:36:20,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:20,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:20,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:36:20,247 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-05-22 02:36:20,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:20,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155594157] [2021-05-22 02:36:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:36:20,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:20,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155594157] [2021-05-22 02:36:20,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155594157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:20,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835796666] [2021-05-22 02:36:20,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:20,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:36:20,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:36:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:36:20,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835796666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:20,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:20,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-05-22 02:36:20,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003037818] [2021-05-22 02:36:20,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:36:20,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:20,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:36:20,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:36:20,627 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:21,118 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-05-22 02:36:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:36:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-22 02:36:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:21,281 INFO L225 Difference]: With dead ends: 51586 [2021-05-22 02:36:21,281 INFO L226 Difference]: Without dead ends: 50003 [2021-05-22 02:36:21,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:36:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-05-22 02:36:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-05-22 02:36:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-05-22 02:36:22,753 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-05-22 02:36:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:22,753 INFO L482 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-05-22 02:36:22,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-05-22 02:36:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:36:22,842 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:22,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:23,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-22 02:36:23,043 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-05-22 02:36:23,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:23,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803749241] [2021-05-22 02:36:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:36:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803749241] [2021-05-22 02:36:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803749241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271627861] [2021-05-22 02:36:23,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:23,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:36:23,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:23,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:36:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:36:23,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271627861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:23,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:23,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-22 02:36:23,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121729435] [2021-05-22 02:36:23,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:36:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:36:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:36:23,221 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:24,080 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-05-22 02:36:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:36:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-22 02:36:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:24,301 INFO L225 Difference]: With dead ends: 63166 [2021-05-22 02:36:24,301 INFO L226 Difference]: Without dead ends: 63106 [2021-05-22 02:36:24,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:36:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-05-22 02:36:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-05-22 02:36:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-05-22 02:36:25,475 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-05-22 02:36:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:25,475 INFO L482 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-05-22 02:36:25,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-05-22 02:36:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:36:25,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:25,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:25,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-22 02:36:25,761 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-05-22 02:36:25,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:25,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224540491] [2021-05-22 02:36:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:36:25,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:25,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224540491] [2021-05-22 02:36:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224540491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:25,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145591259] [2021-05-22 02:36:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:25,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:36:25,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-22 02:36:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:36:25,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145591259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:25,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:25,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-22 02:36:25,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186317928] [2021-05-22 02:36:25,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:36:25,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:36:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:36:25,962 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:26,668 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-05-22 02:36:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:36:26,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:36:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:26,846 INFO L225 Difference]: With dead ends: 49744 [2021-05-22 02:36:26,846 INFO L226 Difference]: Without dead ends: 49407 [2021-05-22 02:36:26,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:36:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-05-22 02:36:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-05-22 02:36:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-05-22 02:36:28,129 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-05-22 02:36:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:28,129 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-05-22 02:36:28,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-05-22 02:36:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:36:28,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:28,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:28,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-22 02:36:28,424 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-05-22 02:36:28,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:28,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392751841] [2021-05-22 02:36:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:28,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:28,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392751841] [2021-05-22 02:36:28,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392751841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:28,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156314296] [2021-05-22 02:36:28,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:28,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:36:28,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:36:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:36:28,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156314296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:28,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:28,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-05-22 02:36:28,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096369640] [2021-05-22 02:36:28,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:36:28,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:28,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:36:28,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:36:28,608 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:29,350 INFO L93 Difference]: Finished difference Result 60825 states and 280291 transitions. [2021-05-22 02:36:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:36:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:36:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:29,545 INFO L225 Difference]: With dead ends: 60825 [2021-05-22 02:36:29,546 INFO L226 Difference]: Without dead ends: 59259 [2021-05-22 02:36:29,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:36:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-05-22 02:36:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 52848. [2021-05-22 02:36:30,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52848 states, 52847 states have (on average 4.702499668855375) internal successors, (248513), 52847 states have internal predecessors, (248513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52848 states to 52848 states and 248513 transitions. [2021-05-22 02:36:30,868 INFO L78 Accepts]: Start accepts. Automaton has 52848 states and 248513 transitions. Word has length 41 [2021-05-22 02:36:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:30,868 INFO L482 AbstractCegarLoop]: Abstraction has 52848 states and 248513 transitions. [2021-05-22 02:36:30,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 52848 states and 248513 transitions. [2021-05-22 02:36:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:36:31,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:31,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:31,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-22 02:36:31,499 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-05-22 02:36:31,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:31,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483036279] [2021-05-22 02:36:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:31,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:31,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483036279] [2021-05-22 02:36:31,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483036279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:31,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978368498] [2021-05-22 02:36:31,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-22 02:36:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:31,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978368498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:31,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:31,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-22 02:36:31,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665967096] [2021-05-22 02:36:31,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:36:31,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:36:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:36:31,729 INFO L87 Difference]: Start difference. First operand 52848 states and 248513 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:32,266 INFO L93 Difference]: Finished difference Result 64976 states and 299967 transitions. [2021-05-22 02:36:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:36:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:36:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:32,494 INFO L225 Difference]: With dead ends: 64976 [2021-05-22 02:36:32,495 INFO L226 Difference]: Without dead ends: 64453 [2021-05-22 02:36:32,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:36:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64453 states. [2021-05-22 02:36:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64453 to 58787. [2021-05-22 02:36:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58787 states, 58786 states have (on average 4.700591977681761) internal successors, (276329), 58786 states have internal predecessors, (276329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58787 states to 58787 states and 276329 transitions. [2021-05-22 02:36:34,404 INFO L78 Accepts]: Start accepts. Automaton has 58787 states and 276329 transitions. Word has length 41 [2021-05-22 02:36:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:34,404 INFO L482 AbstractCegarLoop]: Abstraction has 58787 states and 276329 transitions. [2021-05-22 02:36:34,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 58787 states and 276329 transitions. [2021-05-22 02:36:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:36:34,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:34,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:34,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:34,739 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:34,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-05-22 02:36:34,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:34,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331741056] [2021-05-22 02:36:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:34,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:34,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331741056] [2021-05-22 02:36:34,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331741056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:34,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316533471] [2021-05-22 02:36:34,800 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:34,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:36:34,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:34,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:36:34,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:34,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316533471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:34,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:34,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-22 02:36:34,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078122509] [2021-05-22 02:36:34,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:36:34,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:34,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:36:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:36:34,948 INFO L87 Difference]: Start difference. First operand 58787 states and 276329 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:35,972 INFO L93 Difference]: Finished difference Result 93655 states and 432022 transitions. [2021-05-22 02:36:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:36:35,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:36:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:36,318 INFO L225 Difference]: With dead ends: 93655 [2021-05-22 02:36:36,318 INFO L226 Difference]: Without dead ends: 91110 [2021-05-22 02:36:36,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:36:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-05-22 02:36:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 76620. [2021-05-22 02:36:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76620 states, 76619 states have (on average 4.695597697699005) internal successors, (359772), 76619 states have internal predecessors, (359772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76620 states to 76620 states and 359772 transitions. [2021-05-22 02:36:39,110 INFO L78 Accepts]: Start accepts. Automaton has 76620 states and 359772 transitions. Word has length 41 [2021-05-22 02:36:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:39,110 INFO L482 AbstractCegarLoop]: Abstraction has 76620 states and 359772 transitions. [2021-05-22 02:36:39,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 76620 states and 359772 transitions. [2021-05-22 02:36:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:36:39,288 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:39,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:39,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:39,493 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-05-22 02:36:39,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:39,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603629059] [2021-05-22 02:36:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:39,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:39,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603629059] [2021-05-22 02:36:39,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603629059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:39,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638126978] [2021-05-22 02:36:39,544 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:39,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:36:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:39,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:36:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638126978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:39,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:39,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:36:39,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387069059] [2021-05-22 02:36:39,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:36:39,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:39,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:36:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:36:39,685 INFO L87 Difference]: Start difference. First operand 76620 states and 359772 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:41,097 INFO L93 Difference]: Finished difference Result 163014 states and 750713 transitions. [2021-05-22 02:36:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:36:41,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:36:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:41,674 INFO L225 Difference]: With dead ends: 163014 [2021-05-22 02:36:41,674 INFO L226 Difference]: Without dead ends: 159428 [2021-05-22 02:36:41,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:36:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159428 states. [2021-05-22 02:36:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159428 to 126993. [2021-05-22 02:36:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126993 states, 126992 states have (on average 4.747724266095502) internal successors, (602923), 126992 states have internal predecessors, (602923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126993 states to 126993 states and 602923 transitions. [2021-05-22 02:36:46,658 INFO L78 Accepts]: Start accepts. Automaton has 126993 states and 602923 transitions. Word has length 41 [2021-05-22 02:36:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:46,658 INFO L482 AbstractCegarLoop]: Abstraction has 126993 states and 602923 transitions. [2021-05-22 02:36:46,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 126993 states and 602923 transitions. [2021-05-22 02:36:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:36:46,971 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:46,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:47,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-22 02:36:47,171 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-05-22 02:36:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:47,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904035785] [2021-05-22 02:36:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:47,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904035785] [2021-05-22 02:36:47,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904035785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731121080] [2021-05-22 02:36:47,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:47,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:36:47,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:47,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:36:47,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731121080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:47,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:47,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-22 02:36:47,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295786772] [2021-05-22 02:36:47,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:36:47,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:36:47,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:36:47,360 INFO L87 Difference]: Start difference. First operand 126993 states and 602923 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:48,931 INFO L93 Difference]: Finished difference Result 156598 states and 736161 transitions. [2021-05-22 02:36:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:36:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:36:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:49,554 INFO L225 Difference]: With dead ends: 156598 [2021-05-22 02:36:49,554 INFO L226 Difference]: Without dead ends: 156198 [2021-05-22 02:36:49,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:36:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156198 states. [2021-05-22 02:36:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156198 to 123212. [2021-05-22 02:36:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123212 states, 123211 states have (on average 4.758925745266251) internal successors, (586352), 123211 states have internal predecessors, (586352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123212 states to 123212 states and 586352 transitions. [2021-05-22 02:36:54,348 INFO L78 Accepts]: Start accepts. Automaton has 123212 states and 586352 transitions. Word has length 41 [2021-05-22 02:36:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:36:54,348 INFO L482 AbstractCegarLoop]: Abstraction has 123212 states and 586352 transitions. [2021-05-22 02:36:54,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 123212 states and 586352 transitions. [2021-05-22 02:36:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:36:54,676 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:36:54,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:36:54,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:54,881 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:36:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:36:54,881 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-05-22 02:36:54,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:36:54,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42291772] [2021-05-22 02:36:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:36:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:36:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:36:54,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:36:54,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42291772] [2021-05-22 02:36:54,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42291772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:54,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225883315] [2021-05-22 02:36:54,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:36:54,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:36:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:36:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:36:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:36:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:36:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225883315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:36:55,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:36:55,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-22 02:36:55,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507690306] [2021-05-22 02:36:55,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:36:55,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:36:55,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:36:55,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:36:55,089 INFO L87 Difference]: Start difference. First operand 123212 states and 586352 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:36:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:36:56,710 INFO L93 Difference]: Finished difference Result 166888 states and 780472 transitions. [2021-05-22 02:36:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:36:56,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:36:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:36:57,315 INFO L225 Difference]: With dead ends: 166888 [2021-05-22 02:36:57,315 INFO L226 Difference]: Without dead ends: 163861 [2021-05-22 02:36:57,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:36:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163861 states. [2021-05-22 02:37:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163861 to 96217. [2021-05-22 02:37:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-05-22 02:37:01,160 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-05-22 02:37:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:01,160 INFO L482 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-05-22 02:37:01,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-05-22 02:37:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:01,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:01,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:01,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-22 02:37:01,576 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-05-22 02:37:01,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:01,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587363929] [2021-05-22 02:37:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:01,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587363929] [2021-05-22 02:37:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587363929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842532215] [2021-05-22 02:37:01,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:01,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:37:01,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:37:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:01,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842532215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:01,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:01,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-22 02:37:01,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461819963] [2021-05-22 02:37:01,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:37:01,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:37:01,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:37:01,806 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:03,014 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-05-22 02:37:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:37:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:03,442 INFO L225 Difference]: With dead ends: 118313 [2021-05-22 02:37:03,443 INFO L226 Difference]: Without dead ends: 118079 [2021-05-22 02:37:03,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:37:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-05-22 02:37:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-05-22 02:37:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-05-22 02:37:06,455 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-05-22 02:37:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:06,455 INFO L482 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-05-22 02:37:06,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-05-22 02:37:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:07,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:07,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:07,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-22 02:37:07,435 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-05-22 02:37:07,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:07,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618740843] [2021-05-22 02:37:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:07,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618740843] [2021-05-22 02:37:07,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618740843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206043691] [2021-05-22 02:37:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:07,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:37:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:07,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206043691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:07,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:07,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-22 02:37:07,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898234838] [2021-05-22 02:37:07,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:37:07,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:37:07,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:37:07,685 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:08,463 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-05-22 02:37:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:37:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:09,595 INFO L225 Difference]: With dead ends: 131320 [2021-05-22 02:37:09,595 INFO L226 Difference]: Without dead ends: 130644 [2021-05-22 02:37:09,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:37:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-05-22 02:37:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-05-22 02:37:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-05-22 02:37:13,133 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-05-22 02:37:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:13,133 INFO L482 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-05-22 02:37:13,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-05-22 02:37:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:13,411 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:13,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:13,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-22 02:37:13,612 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-05-22 02:37:13,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:13,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044085729] [2021-05-22 02:37:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:13,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044085729] [2021-05-22 02:37:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044085729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495338823] [2021-05-22 02:37:13,668 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:13,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:37:13,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:37:13,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:13,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495338823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:13,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:13,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:37:13,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097932436] [2021-05-22 02:37:13,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:37:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:37:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:37:13,839 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:15,196 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-05-22 02:37:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:37:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:15,733 INFO L225 Difference]: With dead ends: 140482 [2021-05-22 02:37:15,733 INFO L226 Difference]: Without dead ends: 139756 [2021-05-22 02:37:15,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:37:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-05-22 02:37:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-05-22 02:37:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-05-22 02:37:19,580 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-05-22 02:37:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:19,580 INFO L482 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-05-22 02:37:19,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-05-22 02:37:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:19,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:19,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:20,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-22 02:37:20,063 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-05-22 02:37:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:20,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372483590] [2021-05-22 02:37:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:20,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372483590] [2021-05-22 02:37:20,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372483590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435828331] [2021-05-22 02:37:20,126 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:20,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:37:20,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:37:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:37:20,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435828331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:20,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:20,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-22 02:37:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956415526] [2021-05-22 02:37:20,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:37:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:37:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:37:20,261 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:21,894 INFO L93 Difference]: Finished difference Result 186146 states and 866917 transitions. [2021-05-22 02:37:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:37:21,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:22,607 INFO L225 Difference]: With dead ends: 186146 [2021-05-22 02:37:22,607 INFO L226 Difference]: Without dead ends: 183395 [2021-05-22 02:37:22,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:37:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183395 states. [2021-05-22 02:37:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183395 to 148831. [2021-05-22 02:37:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148831 states, 148830 states have (on average 4.731868574884096) internal successors, (704244), 148830 states have internal predecessors, (704244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148831 states to 148831 states and 704244 transitions. [2021-05-22 02:37:28,089 INFO L78 Accepts]: Start accepts. Automaton has 148831 states and 704244 transitions. Word has length 41 [2021-05-22 02:37:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:28,089 INFO L482 AbstractCegarLoop]: Abstraction has 148831 states and 704244 transitions. [2021-05-22 02:37:28,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 148831 states and 704244 transitions. [2021-05-22 02:37:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:28,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:28,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:28,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-22 02:37:28,641 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-05-22 02:37:28,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:28,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582972921] [2021-05-22 02:37:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:28,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582972921] [2021-05-22 02:37:28,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582972921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:28,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132048721] [2021-05-22 02:37:28,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:28,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:37:28,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:28,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:37:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:28,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132048721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:28,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:28,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-22 02:37:28,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515979574] [2021-05-22 02:37:28,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:37:28,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:28,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:37:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:37:28,849 INFO L87 Difference]: Start difference. First operand 148831 states and 704244 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:31,956 INFO L93 Difference]: Finished difference Result 327820 states and 1534054 transitions. [2021-05-22 02:37:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:37:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:33,922 INFO L225 Difference]: With dead ends: 327820 [2021-05-22 02:37:33,922 INFO L226 Difference]: Without dead ends: 324633 [2021-05-22 02:37:33,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:37:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324633 states. [2021-05-22 02:37:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324633 to 239665. [2021-05-22 02:37:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239665 states, 239664 states have (on average 4.810242673075639) internal successors, (1152842), 239664 states have internal predecessors, (1152842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239665 states to 239665 states and 1152842 transitions. [2021-05-22 02:37:43,599 INFO L78 Accepts]: Start accepts. Automaton has 239665 states and 1152842 transitions. Word has length 41 [2021-05-22 02:37:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:43,599 INFO L482 AbstractCegarLoop]: Abstraction has 239665 states and 1152842 transitions. [2021-05-22 02:37:43,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 239665 states and 1152842 transitions. [2021-05-22 02:37:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:44,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:44,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:45,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:45,036 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-05-22 02:37:45,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:45,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95186994] [2021-05-22 02:37:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:45,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:45,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95186994] [2021-05-22 02:37:45,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95186994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:45,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133137509] [2021-05-22 02:37:45,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:45,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:37:45,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:37:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:37:45,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133137509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:45,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:45,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-22 02:37:45,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525353040] [2021-05-22 02:37:45,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:37:45,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:45,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:37:45,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:37:45,243 INFO L87 Difference]: Start difference. First operand 239665 states and 1152842 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:47,628 INFO L93 Difference]: Finished difference Result 283707 states and 1353356 transitions. [2021-05-22 02:37:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:37:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:49,455 INFO L225 Difference]: With dead ends: 283707 [2021-05-22 02:37:49,455 INFO L226 Difference]: Without dead ends: 283245 [2021-05-22 02:37:49,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:37:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283245 states. [2021-05-22 02:37:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283245 to 208767. [2021-05-22 02:37:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208767 states, 208766 states have (on average 4.808431449565543) internal successors, (1003837), 208766 states have internal predecessors, (1003837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208767 states to 208767 states and 1003837 transitions. [2021-05-22 02:37:57,298 INFO L78 Accepts]: Start accepts. Automaton has 208767 states and 1003837 transitions. Word has length 41 [2021-05-22 02:37:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:57,298 INFO L482 AbstractCegarLoop]: Abstraction has 208767 states and 1003837 transitions. [2021-05-22 02:37:57,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 208767 states and 1003837 transitions. [2021-05-22 02:37:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:57,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:57,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:58,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-22 02:37:58,023 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-05-22 02:37:58,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:58,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908477114] [2021-05-22 02:37:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:58,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:58,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908477114] [2021-05-22 02:37:58,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908477114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:58,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695165454] [2021-05-22 02:37:58,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:58,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:37:58,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:37:58,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:37:58,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695165454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:58,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:58,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-22 02:37:58,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183116223] [2021-05-22 02:37:58,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:37:58,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:58,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:37:58,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:37:58,251 INFO L87 Difference]: Start difference. First operand 208767 states and 1003837 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:02,196 INFO L93 Difference]: Finished difference Result 263379 states and 1254429 transitions. [2021-05-22 02:38:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:38:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:38:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:04,233 INFO L225 Difference]: With dead ends: 263379 [2021-05-22 02:38:04,233 INFO L226 Difference]: Without dead ends: 260502 [2021-05-22 02:38:04,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:38:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260502 states. [2021-05-22 02:38:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260502 to 116427. [2021-05-22 02:38:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-05-22 02:38:09,578 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-05-22 02:38:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:09,578 INFO L482 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-05-22 02:38:09,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-05-22 02:38:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:38:10,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:10,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:10,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-22 02:38:10,616 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-05-22 02:38:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:10,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112478903] [2021-05-22 02:38:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:10,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:10,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112478903] [2021-05-22 02:38:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112478903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520296313] [2021-05-22 02:38:10,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:38:10,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:10,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520296313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:10,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:10,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:38:10,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933380498] [2021-05-22 02:38:10,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:38:10,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:10,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:38:10,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:38:10,789 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:12,529 INFO L93 Difference]: Finished difference Result 223049 states and 1035432 transitions. [2021-05-22 02:38:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:38:12,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:38:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:13,368 INFO L225 Difference]: With dead ends: 223049 [2021-05-22 02:38:13,368 INFO L226 Difference]: Without dead ends: 220377 [2021-05-22 02:38:13,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:38:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220377 states. [2021-05-22 02:38:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220377 to 155837. [2021-05-22 02:38:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155837 states, 155836 states have (on average 4.806129520778254) internal successors, (748968), 155836 states have internal predecessors, (748968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155837 states to 155837 states and 748968 transitions. [2021-05-22 02:38:19,244 INFO L78 Accepts]: Start accepts. Automaton has 155837 states and 748968 transitions. Word has length 41 [2021-05-22 02:38:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:19,244 INFO L482 AbstractCegarLoop]: Abstraction has 155837 states and 748968 transitions. [2021-05-22 02:38:19,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 155837 states and 748968 transitions. [2021-05-22 02:38:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:38:19,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:19,629 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:19,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:19,829 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-05-22 02:38:19,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:19,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287520736] [2021-05-22 02:38:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:19,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:19,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287520736] [2021-05-22 02:38:19,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287520736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:19,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589112300] [2021-05-22 02:38:19,887 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:19,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:38:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:19,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:38:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:38:20,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589112300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:20,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:20,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-22 02:38:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26962755] [2021-05-22 02:38:20,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:38:20,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:38:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:38:20,604 INFO L87 Difference]: Start difference. First operand 155837 states and 748968 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:22,364 INFO L93 Difference]: Finished difference Result 212915 states and 1012751 transitions. [2021-05-22 02:38:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:38:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:38:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:23,191 INFO L225 Difference]: With dead ends: 212915 [2021-05-22 02:38:23,191 INFO L226 Difference]: Without dead ends: 210423 [2021-05-22 02:38:23,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 683.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:38:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210423 states. [2021-05-22 02:38:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210423 to 174189. [2021-05-22 02:38:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174189 states, 174188 states have (on average 4.835143637908467) internal successors, (842224), 174188 states have internal predecessors, (842224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174189 states to 174189 states and 842224 transitions. [2021-05-22 02:38:29,394 INFO L78 Accepts]: Start accepts. Automaton has 174189 states and 842224 transitions. Word has length 41 [2021-05-22 02:38:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:29,394 INFO L482 AbstractCegarLoop]: Abstraction has 174189 states and 842224 transitions. [2021-05-22 02:38:29,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 174189 states and 842224 transitions. [2021-05-22 02:38:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:38:30,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:30,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:30,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-22 02:38:30,710 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:30,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-05-22 02:38:30,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:30,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779387812] [2021-05-22 02:38:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:30,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:30,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779387812] [2021-05-22 02:38:30,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779387812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:30,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578730259] [2021-05-22 02:38:30,774 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:30,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:38:30,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:38:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:30,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578730259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:30,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:30,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-22 02:38:30,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097622397] [2021-05-22 02:38:30,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:38:30,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:38:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:38:30,918 INFO L87 Difference]: Start difference. First operand 174189 states and 842224 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:34,609 INFO L93 Difference]: Finished difference Result 397194 states and 1899439 transitions. [2021-05-22 02:38:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:38:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:38:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:36,998 INFO L225 Difference]: With dead ends: 397194 [2021-05-22 02:38:36,998 INFO L226 Difference]: Without dead ends: 393877 [2021-05-22 02:38:36,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:38:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393877 states. [2021-05-22 02:38:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393877 to 269480. [2021-05-22 02:38:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269480 states, 269479 states have (on average 4.951157604117575) internal successors, (1334233), 269479 states have internal predecessors, (1334233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269480 states to 269480 states and 1334233 transitions. [2021-05-22 02:38:49,703 INFO L78 Accepts]: Start accepts. Automaton has 269480 states and 1334233 transitions. Word has length 41 [2021-05-22 02:38:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:49,703 INFO L482 AbstractCegarLoop]: Abstraction has 269480 states and 1334233 transitions. [2021-05-22 02:38:49,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 269480 states and 1334233 transitions. [2021-05-22 02:38:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:38:50,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:50,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:50,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:50,609 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-05-22 02:38:50,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:50,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755668343] [2021-05-22 02:38:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:50,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:50,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755668343] [2021-05-22 02:38:50,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755668343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:50,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542398104] [2021-05-22 02:38:50,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:50,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:38:50,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:38:50,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:38:50,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542398104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:50,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:50,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-22 02:38:50,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825228473] [2021-05-22 02:38:50,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:38:50,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:50,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:38:50,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:38:50,811 INFO L87 Difference]: Start difference. First operand 269480 states and 1334233 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:54,430 INFO L93 Difference]: Finished difference Result 316931 states and 1549745 transitions. [2021-05-22 02:38:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:38:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:38:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:56,420 INFO L225 Difference]: With dead ends: 316931 [2021-05-22 02:38:56,421 INFO L226 Difference]: Without dead ends: 316481 [2021-05-22 02:38:56,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:38:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316481 states. [2021-05-22 02:39:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316481 to 205144. [2021-05-22 02:39:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205144 states, 205143 states have (on average 4.904305776945837) internal successors, (1006084), 205143 states have internal predecessors, (1006084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205144 states to 205144 states and 1006084 transitions. [2021-05-22 02:39:04,191 INFO L78 Accepts]: Start accepts. Automaton has 205144 states and 1006084 transitions. Word has length 41 [2021-05-22 02:39:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:04,191 INFO L482 AbstractCegarLoop]: Abstraction has 205144 states and 1006084 transitions. [2021-05-22 02:39:04,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 205144 states and 1006084 transitions. [2021-05-22 02:39:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:39:05,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:05,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:05,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-22 02:39:05,605 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:05,605 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-05-22 02:39:05,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:05,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709408067] [2021-05-22 02:39:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:05,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709408067] [2021-05-22 02:39:05,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709408067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325105698] [2021-05-22 02:39:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:05,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:39:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:39:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:39:05,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325105698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:05,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:05,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-22 02:39:05,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206767018] [2021-05-22 02:39:05,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:39:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:39:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:39:05,828 INFO L87 Difference]: Start difference. First operand 205144 states and 1006084 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:09,202 INFO L93 Difference]: Finished difference Result 351280 states and 1697991 transitions. [2021-05-22 02:39:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:39:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:39:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:10,581 INFO L225 Difference]: With dead ends: 351280 [2021-05-22 02:39:10,582 INFO L226 Difference]: Without dead ends: 347746 [2021-05-22 02:39:10,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:39:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347746 states. [2021-05-22 02:39:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347746 to 266100. [2021-05-22 02:39:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266100 states, 266099 states have (on average 4.991721126347713) internal successors, (1328292), 266099 states have internal predecessors, (1328292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266100 states to 266100 states and 1328292 transitions. [2021-05-22 02:39:21,998 INFO L78 Accepts]: Start accepts. Automaton has 266100 states and 1328292 transitions. Word has length 41 [2021-05-22 02:39:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:21,998 INFO L482 AbstractCegarLoop]: Abstraction has 266100 states and 1328292 transitions. [2021-05-22 02:39:21,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 266100 states and 1328292 transitions. [2021-05-22 02:39:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-22 02:39:22,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:22,718 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:22,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-22 02:39:22,919 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:22,919 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-05-22 02:39:22,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:22,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680667274] [2021-05-22 02:39:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:39:22,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:22,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680667274] [2021-05-22 02:39:22,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680667274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:22,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56652466] [2021-05-22 02:39:22,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:23,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:39:23,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:23,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:39:23,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:39:23,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56652466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:23,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:23,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:39:23,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075702730] [2021-05-22 02:39:23,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:39:23,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:39:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:39:23,140 INFO L87 Difference]: Start difference. First operand 266100 states and 1328292 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:28,330 INFO L93 Difference]: Finished difference Result 517007 states and 2493362 transitions. [2021-05-22 02:39:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:39:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-22 02:39:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:31,222 INFO L225 Difference]: With dead ends: 517007 [2021-05-22 02:39:31,222 INFO L226 Difference]: Without dead ends: 515961 [2021-05-22 02:39:31,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:39:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515961 states. [2021-05-22 02:39:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515961 to 210221. [2021-05-22 02:39:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210221 states, 210220 states have (on average 4.792717153458282) internal successors, (1007525), 210220 states have internal predecessors, (1007525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210221 states to 210221 states and 1007525 transitions. [2021-05-22 02:39:42,046 INFO L78 Accepts]: Start accepts. Automaton has 210221 states and 1007525 transitions. Word has length 43 [2021-05-22 02:39:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:42,046 INFO L482 AbstractCegarLoop]: Abstraction has 210221 states and 1007525 transitions. [2021-05-22 02:39:42,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 210221 states and 1007525 transitions. [2021-05-22 02:39:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-22 02:39:42,928 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:42,928 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:43,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-22 02:39:43,141 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-05-22 02:39:43,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:43,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559973102] [2021-05-22 02:39:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:39:43,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:43,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559973102] [2021-05-22 02:39:43,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559973102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:43,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711908059] [2021-05-22 02:39:43,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:43,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:39:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:39:43,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711908059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:43,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:43,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-22 02:39:43,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021680855] [2021-05-22 02:39:43,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:39:43,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:39:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:39:43,361 INFO L87 Difference]: Start difference. First operand 210221 states and 1007525 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:48,895 INFO L93 Difference]: Finished difference Result 490894 states and 2284771 transitions. [2021-05-22 02:39:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:39:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-22 02:39:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:52,514 INFO L225 Difference]: With dead ends: 490894 [2021-05-22 02:39:52,515 INFO L226 Difference]: Without dead ends: 487402 [2021-05-22 02:39:52,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:39:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487402 states. [2021-05-22 02:40:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487402 to 245403. [2021-05-22 02:40:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245403 states, 245402 states have (on average 4.805160512139265) internal successors, (1179196), 245402 states have internal predecessors, (1179196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245403 states to 245403 states and 1179196 transitions. [2021-05-22 02:40:05,485 INFO L78 Accepts]: Start accepts. Automaton has 245403 states and 1179196 transitions. Word has length 43 [2021-05-22 02:40:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:05,485 INFO L482 AbstractCegarLoop]: Abstraction has 245403 states and 1179196 transitions. [2021-05-22 02:40:05,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 245403 states and 1179196 transitions. [2021-05-22 02:40:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-22 02:40:06,253 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:06,253 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:06,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-22 02:40:06,458 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:06,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-05-22 02:40:06,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:06,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079101398] [2021-05-22 02:40:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:40:06,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:06,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079101398] [2021-05-22 02:40:06,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079101398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:06,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804137372] [2021-05-22 02:40:06,522 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:06,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:40:06,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:06,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:40:06,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:40:06,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804137372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:06,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:06,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-22 02:40:06,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992106751] [2021-05-22 02:40:06,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:40:06,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:40:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:40:06,673 INFO L87 Difference]: Start difference. First operand 245403 states and 1179196 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:10,872 INFO L93 Difference]: Finished difference Result 401083 states and 1918180 transitions. [2021-05-22 02:40:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:40:10,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-22 02:40:10,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:13,439 INFO L225 Difference]: With dead ends: 401083 [2021-05-22 02:40:13,439 INFO L226 Difference]: Without dead ends: 400185 [2021-05-22 02:40:13,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:40:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400185 states. [2021-05-22 02:40:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400185 to 102134. [2021-05-22 02:40:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-05-22 02:40:20,119 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-05-22 02:40:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:20,119 INFO L482 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-05-22 02:40:20,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-05-22 02:40:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-22 02:40:21,388 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:21,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:21,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:21,628 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-05-22 02:40:21,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:21,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340170937] [2021-05-22 02:40:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:40:21,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:21,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340170937] [2021-05-22 02:40:21,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340170937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:21,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148240394] [2021-05-22 02:40:21,702 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:21,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:40:21,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:40:21,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:40:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148240394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-22 02:40:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794663249] [2021-05-22 02:40:21,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:40:21,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:40:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:40:21,957 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:26,355 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-05-22 02:40:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:40:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-22 02:40:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:27,846 INFO L225 Difference]: With dead ends: 359669 [2021-05-22 02:40:27,846 INFO L226 Difference]: Without dead ends: 358139 [2021-05-22 02:40:27,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 1002.8ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:40:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-05-22 02:40:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-05-22 02:40:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-05-22 02:40:35,440 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-05-22 02:40:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:35,440 INFO L482 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-05-22 02:40:35,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-05-22 02:40:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-22 02:40:35,833 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:35,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:36,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-22 02:40:36,034 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-05-22 02:40:36,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:36,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437901823] [2021-05-22 02:40:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-22 02:40:36,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:36,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437901823] [2021-05-22 02:40:36,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437901823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:36,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834841679] [2021-05-22 02:40:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:36,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:40:36,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:40:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:40:36,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834841679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:36,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:36,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-22 02:40:36,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185341574] [2021-05-22 02:40:36,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:40:36,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:40:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:40:36,235 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:39,725 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-05-22 02:40:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:40:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-22 02:40:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:41,105 INFO L225 Difference]: With dead ends: 318028 [2021-05-22 02:40:41,105 INFO L226 Difference]: Without dead ends: 317616 [2021-05-22 02:40:41,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:40:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-05-22 02:40:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-05-22 02:40:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-05-22 02:40:47,951 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-05-22 02:40:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:47,951 INFO L482 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-05-22 02:40:47,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-05-22 02:40:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:40:49,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:49,110 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:49,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:49,311 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-05-22 02:40:49,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:49,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818931616] [2021-05-22 02:40:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-22 02:40:49,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:49,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818931616] [2021-05-22 02:40:49,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818931616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:49,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286303780] [2021-05-22 02:40:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:49,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:40:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:40:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-22 02:40:49,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286303780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:49,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:49,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-22 02:40:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379552319] [2021-05-22 02:40:49,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:40:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:40:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:40:49,507 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:55,595 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-05-22 02:40:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:40:55,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:40:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:59,020 INFO L225 Difference]: With dead ends: 593260 [2021-05-22 02:40:59,020 INFO L226 Difference]: Without dead ends: 584415 [2021-05-22 02:40:59,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:41:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-05-22 02:41:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-05-22 02:41:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-05-22 02:41:10,939 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-05-22 02:41:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:10,939 INFO L482 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-05-22 02:41:10,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-05-22 02:41:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:41:12,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:12,130 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:12,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:12,345 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-05-22 02:41:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011484510] [2021-05-22 02:41:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-22 02:41:12,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:12,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011484510] [2021-05-22 02:41:12,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011484510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:12,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788476958] [2021-05-22 02:41:12,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:12,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:41:12,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:41:12,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:41:12,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-22 02:41:12,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788476958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:12,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:12,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-05-22 02:41:12,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016254093] [2021-05-22 02:41:12,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:41:12,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:41:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:41:12,526 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:19,093 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-05-22 02:41:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-22 02:41:19,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:41:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:21,944 INFO L225 Difference]: With dead ends: 489163 [2021-05-22 02:41:21,945 INFO L226 Difference]: Without dead ends: 486417 [2021-05-22 02:41:21,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 1366.8ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-05-22 02:41:22,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-05-22 02:41:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-05-22 02:41:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-05-22 02:41:32,023 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-05-22 02:41:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:32,023 INFO L482 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-05-22 02:41:32,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-05-22 02:41:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:41:33,303 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:33,303 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:33,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-22 02:41:33,504 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-05-22 02:41:33,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:33,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376407246] [2021-05-22 02:41:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:41:33,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:33,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376407246] [2021-05-22 02:41:33,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376407246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:33,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291829676] [2021-05-22 02:41:33,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:41:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:41:33,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291829676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:33,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:33,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-22 02:41:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679529497] [2021-05-22 02:41:33,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:41:33,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:33,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:41:33,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:41:33,696 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:37,128 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-05-22 02:41:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:41:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:41:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:38,581 INFO L225 Difference]: With dead ends: 345677 [2021-05-22 02:41:38,581 INFO L226 Difference]: Without dead ends: 344598 [2021-05-22 02:41:38,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:41:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-05-22 02:41:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-05-22 02:41:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-05-22 02:41:46,555 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-05-22 02:41:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:46,555 INFO L482 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-05-22 02:41:46,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-05-22 02:41:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:41:47,758 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:47,758 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:47,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:47,971 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:47,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-05-22 02:41:47,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:47,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270555801] [2021-05-22 02:41:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-22 02:41:48,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270555801] [2021-05-22 02:41:48,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270555801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867573232] [2021-05-22 02:41:48,007 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:48,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:41:48,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:41:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:41:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:41:48,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867573232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:48,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:48,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-22 02:41:48,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226545748] [2021-05-22 02:41:48,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:41:48,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:41:48,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:41:48,141 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:51,996 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-05-22 02:41:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:41:51,997 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:41:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:53,563 INFO L225 Difference]: With dead ends: 362878 [2021-05-22 02:41:53,564 INFO L226 Difference]: Without dead ends: 361792 [2021-05-22 02:41:53,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:41:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-05-22 02:42:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-05-22 02:42:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-05-22 02:42:04,242 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-05-22 02:42:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:42:04,242 INFO L482 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-05-22 02:42:04,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-05-22 02:42:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:42:05,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:42:05,567 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:42:05,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-22 02:42:05,777 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:42:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:42:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-05-22 02:42:05,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:42:05,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486676633] [2021-05-22 02:42:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:42:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:42:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:42:05,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:42:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486676633] [2021-05-22 02:42:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486676633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842221842] [2021-05-22 02:42:05,851 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:42:05,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:42:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:42:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:42:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:42:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:42:06,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842221842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:06,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:42:06,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-22 02:42:06,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504350525] [2021-05-22 02:42:06,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:42:06,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:42:06,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:42:06,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:42:06,104 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:42:14,233 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-05-22 02:42:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-22 02:42:14,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:42:14,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:42:16,820 INFO L225 Difference]: With dead ends: 557436 [2021-05-22 02:42:16,821 INFO L226 Difference]: Without dead ends: 555086 [2021-05-22 02:42:16,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1888.0ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-05-22 02:42:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-05-22 02:42:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555086 to 417023. [2021-05-22 02:42:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417023 states, 417022 states have (on average 4.902988331550853) internal successors, (2044654), 417022 states have internal predecessors, (2044654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417023 states to 417023 states and 2044654 transitions. [2021-05-22 02:42:35,235 INFO L78 Accepts]: Start accepts. Automaton has 417023 states and 2044654 transitions. Word has length 45 [2021-05-22 02:42:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:42:35,235 INFO L482 AbstractCegarLoop]: Abstraction has 417023 states and 2044654 transitions. [2021-05-22 02:42:35,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 417023 states and 2044654 transitions. [2021-05-22 02:42:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:42:37,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:42:37,084 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:42:37,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:42:37,300 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:42:37,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:42:37,300 INFO L82 PathProgramCache]: Analyzing trace with hash -113271554, now seen corresponding path program 46 times [2021-05-22 02:42:37,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:42:37,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530401492] [2021-05-22 02:42:37,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:42:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:42:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-22 02:42:37,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:42:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530401492] [2021-05-22 02:42:37,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530401492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482606362] [2021-05-22 02:42:37,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:42:37,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:42:37,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:42:37,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:42:37,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:42:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:42:37,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482606362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:37,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:42:37,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-22 02:42:37,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529414245] [2021-05-22 02:42:37,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:42:37,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:42:37,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:42:37,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:42:37,482 INFO L87 Difference]: Start difference. First operand 417023 states and 2044654 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:42:48,425 INFO L93 Difference]: Finished difference Result 928977 states and 4483718 transitions. [2021-05-22 02:42:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:42:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:42:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:42:58,481 INFO L225 Difference]: With dead ends: 928977 [2021-05-22 02:42:58,481 INFO L226 Difference]: Without dead ends: 928257 [2021-05-22 02:42:58,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:43:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928257 states. [2021-05-22 02:43:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928257 to 605432. [2021-05-22 02:43:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605432 states, 605431 states have (on average 4.958003471906791) internal successors, (3001729), 605431 states have internal predecessors, (3001729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605432 states to 605432 states and 3001729 transitions. [2021-05-22 02:43:27,054 INFO L78 Accepts]: Start accepts. Automaton has 605432 states and 3001729 transitions. Word has length 45 [2021-05-22 02:43:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:43:27,054 INFO L482 AbstractCegarLoop]: Abstraction has 605432 states and 3001729 transitions. [2021-05-22 02:43:27,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 605432 states and 3001729 transitions. [2021-05-22 02:43:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:43:31,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:43:31,030 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:43:31,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-22 02:43:31,246 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:43:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:43:31,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1285587010, now seen corresponding path program 47 times [2021-05-22 02:43:31,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:43:31,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856572321] [2021-05-22 02:43:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:43:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:43:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:43:31,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:43:31,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856572321] [2021-05-22 02:43:31,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856572321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:31,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413411960] [2021-05-22 02:43:31,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:43:31,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:43:31,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:43:31,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:43:31,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:43:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:43:31,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413411960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:31,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:43:31,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-05-22 02:43:31,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044522451] [2021-05-22 02:43:31,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:43:31,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:43:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:43:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:43:31,473 INFO L87 Difference]: Start difference. First operand 605432 states and 3001729 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:43:47,218 INFO L93 Difference]: Finished difference Result 1140384 states and 5478626 transitions. [2021-05-22 02:43:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:43:47,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:43:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:43:58,482 INFO L225 Difference]: With dead ends: 1140384 [2021-05-22 02:43:58,482 INFO L226 Difference]: Without dead ends: 1137922 [2021-05-22 02:43:58,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 558.0ms TimeCoverageRelationStatistics Valid=660, Invalid=2096, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:44:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137922 states. [2021-05-22 02:44:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137922 to 669469. [2021-05-22 02:44:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669469 states, 669468 states have (on average 4.940984483201587) internal successors, (3307831), 669468 states have internal predecessors, (3307831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669469 states to 669469 states and 3307831 transitions. [2021-05-22 02:44:36,067 INFO L78 Accepts]: Start accepts. Automaton has 669469 states and 3307831 transitions. Word has length 45 [2021-05-22 02:44:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:44:36,067 INFO L482 AbstractCegarLoop]: Abstraction has 669469 states and 3307831 transitions. [2021-05-22 02:44:36,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 669469 states and 3307831 transitions. [2021-05-22 02:44:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:44:40,242 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:44:40,242 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:44:40,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-22 02:44:40,459 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:44:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:44:40,459 INFO L82 PathProgramCache]: Analyzing trace with hash -538949502, now seen corresponding path program 48 times [2021-05-22 02:44:40,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:44:40,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42067647] [2021-05-22 02:44:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:44:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:44:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 02:44:40,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:44:40,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42067647] [2021-05-22 02:44:40,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42067647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:40,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509798980] [2021-05-22 02:44:40,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:44:40,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:44:40,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:44:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:44:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:44:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:44:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509798980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:40,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:44:40,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-05-22 02:44:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549748785] [2021-05-22 02:44:40,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:44:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:44:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:44:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:44:40,721 INFO L87 Difference]: Start difference. First operand 669469 states and 3307831 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)