/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:29:59,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:29:59,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:29:59,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:29:59,243 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.epf [2021-02-19 18:29:59,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:29:59,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:29:59,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:29:59,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:29:59,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:29:59,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:29:59,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:29:59,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:29:59,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:29:59,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:29:59,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:29:59,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:29:59,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:29:59,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:29:59,277 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:29:59,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:29:59,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:29:59,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:29:59,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:29:59,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:29:59,614 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:29:59,617 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:29:59,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl [2021-02-19 18:29:59,621 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl' [2021-02-19 18:29:59,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:29:59,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:29:59,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:29:59,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:29:59,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:29:59,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:29:59,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:29:59,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:29:59,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:29:59,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/1) ... [2021-02-19 18:29:59,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:29:59,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:29:59,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:29:59,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:29:59,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (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 [2021-02-19 18:29:59,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:29:59,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:29:59,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:29:59,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:29:59,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:29:59,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:29:59,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:29:59,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:29:59,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:29:59,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:29:59,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:29:59,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:29:59,787 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:29:59,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:29:59,970 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:29:59,971 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:29:59 BoogieIcfgContainer [2021-02-19 18:29:59,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:29:59,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:29:59,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:29:59,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:29:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:29:59" (1/2) ... [2021-02-19 18:29:59,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b815421 and model type send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:29:59, skipping insertion in model container [2021-02-19 18:29:59,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:29:59" (2/2) ... [2021-02-19 18:29:59,978 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive.wvr.bpl [2021-02-19 18:29:59,982 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:29:59,982 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:29:59,986 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:29:59,986 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:30:00,039 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 18:30:00,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 18:30:00,073 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:30:00,073 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:30:00,073 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:30:00,073 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:30:00,073 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:30:00,073 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:30:00,074 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:30:00,074 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:30:00,090 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 30 transitions, 84 flow [2021-02-19 18:30:00,118 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 149 states, 147 states have (on average 2.7551020408163267) internal successors, (405), 148 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 2.7551020408163267) internal successors, (405), 148 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 18:30:00,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:00,135 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:00,137 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -133598994, now seen corresponding path program 1 times [2021-02-19 18:30:00,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:00,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446780696] [2021-02-19 18:30:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:00,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446780696] [2021-02-19 18:30:00,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:30:00,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:30:00,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174878342] [2021-02-19 18:30:00,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:30:00,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:00,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:30:00,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:30:00,309 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 2.7551020408163267) internal successors, (405), 148 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:00,364 INFO L93 Difference]: Finished difference Result 159 states and 404 transitions. [2021-02-19 18:30:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:30:00,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 18:30:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:00,374 INFO L225 Difference]: With dead ends: 159 [2021-02-19 18:30:00,374 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 18:30:00,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:30:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 18:30:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-02-19 18:30:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.39) internal successors, (239), 100 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 239 transitions. [2021-02-19 18:30:00,433 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 239 transitions. Word has length 17 [2021-02-19 18:30:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:00,434 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 239 transitions. [2021-02-19 18:30:00,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 239 transitions. [2021-02-19 18:30:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 18:30:00,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:00,437 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:00,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:30:00,438 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash 130959304, now seen corresponding path program 2 times [2021-02-19 18:30:00,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:00,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38702760] [2021-02-19 18:30:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:00,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38702760] [2021-02-19 18:30:00,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:30:00,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:30:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124534544] [2021-02-19 18:30:00,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:30:00,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:00,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:30:00,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:30:00,527 INFO L87 Difference]: Start difference. First operand 101 states and 239 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:00,579 INFO L93 Difference]: Finished difference Result 153 states and 362 transitions. [2021-02-19 18:30:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:30:00,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 18:30:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:00,583 INFO L225 Difference]: With dead ends: 153 [2021-02-19 18:30:00,583 INFO L226 Difference]: Without dead ends: 123 [2021-02-19 18:30:00,584 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:30:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-19 18:30:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-02-19 18:30:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.4344262295081966) internal successors, (297), 122 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2021-02-19 18:30:00,596 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 17 [2021-02-19 18:30:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:00,596 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2021-02-19 18:30:00,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2021-02-19 18:30:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:30:00,597 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:00,598 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:00,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:30:00,598 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash 180841738, now seen corresponding path program 1 times [2021-02-19 18:30:00,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:00,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260430219] [2021-02-19 18:30:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:00,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260430219] [2021-02-19 18:30:00,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:30:00,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 18:30:00,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39192011] [2021-02-19 18:30:00,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:30:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:00,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:30:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:30:00,623 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:00,630 INFO L93 Difference]: Finished difference Result 137 states and 328 transitions. [2021-02-19 18:30:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:30:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:30:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:00,631 INFO L225 Difference]: With dead ends: 137 [2021-02-19 18:30:00,631 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 18:30:00,632 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:30:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 18:30:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-02-19 18:30:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.411764705882353) internal successors, (328), 136 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2021-02-19 18:30:00,639 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 19 [2021-02-19 18:30:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:00,639 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2021-02-19 18:30:00,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2021-02-19 18:30:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:30:00,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:00,641 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:00,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:30:00,641 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1773484334, now seen corresponding path program 1 times [2021-02-19 18:30:00,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:00,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413377881] [2021-02-19 18:30:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:00,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413377881] [2021-02-19 18:30:00,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426254511] [2021-02-19 18:30:00,745 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 [2021-02-19 18:30:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:30:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:01,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-02-19 18:30:01,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:01,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:01,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:01,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-02-19 18:30:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:01,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:01,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 18:30:01,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241188537] [2021-02-19 18:30:01,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:30:01,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:30:01,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:30:01,059 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:01,130 INFO L93 Difference]: Finished difference Result 207 states and 501 transitions. [2021-02-19 18:30:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:30:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:30:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:01,132 INFO L225 Difference]: With dead ends: 207 [2021-02-19 18:30:01,132 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 18:30:01,133 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:30:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 18:30:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-02-19 18:30:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.448717948717949) internal successors, (382), 156 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 382 transitions. [2021-02-19 18:30:01,141 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 382 transitions. Word has length 23 [2021-02-19 18:30:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:01,141 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 382 transitions. [2021-02-19 18:30:01,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 382 transitions. [2021-02-19 18:30:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:30:01,142 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:01,142 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:01,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:01,344 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash 974522702, now seen corresponding path program 1 times [2021-02-19 18:30:01,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:01,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090178500] [2021-02-19 18:30:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:01,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090178500] [2021-02-19 18:30:01,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:30:01,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:30:01,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447823188] [2021-02-19 18:30:01,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:30:01,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:30:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:30:01,363 INFO L87 Difference]: Start difference. First operand 157 states and 382 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:01,369 INFO L93 Difference]: Finished difference Result 175 states and 425 transitions. [2021-02-19 18:30:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:30:01,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:30:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:01,371 INFO L225 Difference]: With dead ends: 175 [2021-02-19 18:30:01,371 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 18:30:01,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:30:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 18:30:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2021-02-19 18:30:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4342105263157894) internal successors, (370), 152 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 370 transitions. [2021-02-19 18:30:01,378 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 370 transitions. Word has length 23 [2021-02-19 18:30:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:01,379 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 370 transitions. [2021-02-19 18:30:01,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 370 transitions. [2021-02-19 18:30:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:30:01,380 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:01,380 INFO L506 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] [2021-02-19 18:30:01,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:30:01,380 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:01,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1292406384, now seen corresponding path program 2 times [2021-02-19 18:30:01,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:01,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864633301] [2021-02-19 18:30:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:01,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864633301] [2021-02-19 18:30:01,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878123681] [2021-02-19 18:30:01,421 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 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 [2021-02-19 18:30:01,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:01,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:30:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:30:01,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 18:30:01,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-02-19 18:30:01,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431888075] [2021-02-19 18:30:01,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:30:01,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:01,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:30:01,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:30:01,522 INFO L87 Difference]: Start difference. First operand 153 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:01,536 INFO L93 Difference]: Finished difference Result 401 states and 958 transitions. [2021-02-19 18:30:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:30:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:30:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:01,539 INFO L225 Difference]: With dead ends: 401 [2021-02-19 18:30:01,539 INFO L226 Difference]: Without dead ends: 393 [2021-02-19 18:30:01,539 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:30:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-02-19 18:30:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 259. [2021-02-19 18:30:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.5155038759689923) internal successors, (649), 258 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 649 transitions. [2021-02-19 18:30:01,550 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 649 transitions. Word has length 25 [2021-02-19 18:30:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:01,551 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 649 transitions. [2021-02-19 18:30:01,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 649 transitions. [2021-02-19 18:30:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:30:01,552 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:01,552 INFO L506 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] [2021-02-19 18:30:01,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:01,753 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 893343308, now seen corresponding path program 3 times [2021-02-19 18:30:01,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:01,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409030331] [2021-02-19 18:30:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:01,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409030331] [2021-02-19 18:30:01,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731941840] [2021-02-19 18:30:01,793 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 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 [2021-02-19 18:30:01,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:30:01,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:30:01,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:01,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:01,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 18:30:01,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446635411] [2021-02-19 18:30:01,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:30:01,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:01,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:30:01,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:30:01,918 INFO L87 Difference]: Start difference. First operand 259 states and 649 transitions. Second operand has 4 states, 4 states have (on average 7.25) 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) [2021-02-19 18:30:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:01,931 INFO L93 Difference]: Finished difference Result 363 states and 850 transitions. [2021-02-19 18:30:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:30:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) 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 [2021-02-19 18:30:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:01,934 INFO L225 Difference]: With dead ends: 363 [2021-02-19 18:30:01,935 INFO L226 Difference]: Without dead ends: 363 [2021-02-19 18:30:01,935 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:30:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-02-19 18:30:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 319. [2021-02-19 18:30:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.39937106918239) internal successors, (763), 318 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 763 transitions. [2021-02-19 18:30:01,953 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 763 transitions. Word has length 29 [2021-02-19 18:30:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:01,954 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 763 transitions. [2021-02-19 18:30:01,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) 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) [2021-02-19 18:30:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 763 transitions. [2021-02-19 18:30:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:30:01,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:01,958 INFO L506 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] [2021-02-19 18:30:02,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:02,179 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash 94381676, now seen corresponding path program 1 times [2021-02-19 18:30:02,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:02,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296765911] [2021-02-19 18:30:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296765911] [2021-02-19 18:30:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66370628] [2021-02-19 18:30:02,345 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 [2021-02-19 18:30:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:02,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 18:30:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:02,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:02,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 18:30:02,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:02,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:02,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:02,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-02-19 18:30:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:02,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:02,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 18:30:02,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969803214] [2021-02-19 18:30:02,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:30:02,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:30:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:30:02,602 INFO L87 Difference]: Start difference. First operand 319 states and 763 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:02,724 INFO L93 Difference]: Finished difference Result 455 states and 1091 transitions. [2021-02-19 18:30:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:30:02,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:30:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:02,726 INFO L225 Difference]: With dead ends: 455 [2021-02-19 18:30:02,726 INFO L226 Difference]: Without dead ends: 415 [2021-02-19 18:30:02,727 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:30:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-02-19 18:30:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 351. [2021-02-19 18:30:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.3857142857142857) internal successors, (835), 350 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 835 transitions. [2021-02-19 18:30:02,736 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 835 transitions. Word has length 29 [2021-02-19 18:30:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:02,736 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 835 transitions. [2021-02-19 18:30:02,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 835 transitions. [2021-02-19 18:30:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:30:02,737 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:02,737 INFO L506 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] [2021-02-19 18:30:02,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:02,958 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:02,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:02,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1412282260, now seen corresponding path program 2 times [2021-02-19 18:30:02,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:02,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144166418] [2021-02-19 18:30:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:03,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144166418] [2021-02-19 18:30:03,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485444381] [2021-02-19 18:30:03,060 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) [2021-02-19 18:30:03,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:03,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 18:30:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:03,191 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:30:03,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 18:30:03,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:03,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:03,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:03,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-02-19 18:30:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:03,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:03,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 18:30:03,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197398478] [2021-02-19 18:30:03,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:30:03,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:30:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:30:03,223 INFO L87 Difference]: Start difference. First operand 351 states and 835 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:03,343 INFO L93 Difference]: Finished difference Result 483 states and 1151 transitions. [2021-02-19 18:30:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:30:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:30:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:03,346 INFO L225 Difference]: With dead ends: 483 [2021-02-19 18:30:03,346 INFO L226 Difference]: Without dead ends: 447 [2021-02-19 18:30:03,347 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:30:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-02-19 18:30:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 383. [2021-02-19 18:30:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.3952879581151834) internal successors, (915), 382 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 915 transitions. [2021-02-19 18:30:03,355 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 915 transitions. Word has length 29 [2021-02-19 18:30:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:03,355 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 915 transitions. [2021-02-19 18:30:03,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 915 transitions. [2021-02-19 18:30:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:30:03,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:03,356 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:03,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:03,562 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:03,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2082391598, now seen corresponding path program 3 times [2021-02-19 18:30:03,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:03,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637144762] [2021-02-19 18:30:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:03,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637144762] [2021-02-19 18:30:03,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043151982] [2021-02-19 18:30:03,597 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) [2021-02-19 18:30:03,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:30:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:30:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:30:03,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:03,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:30:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473352424] [2021-02-19 18:30:03,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:30:03,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:30:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:30:03,674 INFO L87 Difference]: Start difference. First operand 383 states and 915 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:03,694 INFO L93 Difference]: Finished difference Result 827 states and 1940 transitions. [2021-02-19 18:30:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:30:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:30:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:03,698 INFO L225 Difference]: With dead ends: 827 [2021-02-19 18:30:03,698 INFO L226 Difference]: Without dead ends: 819 [2021-02-19 18:30:03,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:30:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-02-19 18:30:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 463. [2021-02-19 18:30:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.448051948051948) internal successors, (1131), 462 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1131 transitions. [2021-02-19 18:30:03,712 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1131 transitions. Word has length 31 [2021-02-19 18:30:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:03,712 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1131 transitions. [2021-02-19 18:30:03,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1131 transitions. [2021-02-19 18:30:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:30:03,713 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:03,713 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:03,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:03,930 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:03,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1371087606, now seen corresponding path program 4 times [2021-02-19 18:30:03,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:03,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975456995] [2021-02-19 18:30:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:04,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975456995] [2021-02-19 18:30:04,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984590782] [2021-02-19 18:30:04,126 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 [2021-02-19 18:30:04,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:04,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:04,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:30:04,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:04,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:04,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:04,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:04,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 18:30:04,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:04,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:04,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:04,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-02-19 18:30:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:04,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:04,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 18:30:04,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916160593] [2021-02-19 18:30:04,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:30:04,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:30:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:30:04,391 INFO L87 Difference]: Start difference. First operand 463 states and 1131 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:04,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:04,656 INFO L93 Difference]: Finished difference Result 851 states and 2063 transitions. [2021-02-19 18:30:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:30:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:30:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:04,659 INFO L225 Difference]: With dead ends: 851 [2021-02-19 18:30:04,660 INFO L226 Difference]: Without dead ends: 735 [2021-02-19 18:30:04,660 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:30:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-02-19 18:30:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 591. [2021-02-19 18:30:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.4322033898305087) internal successors, (1435), 590 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1435 transitions. [2021-02-19 18:30:04,678 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1435 transitions. Word has length 35 [2021-02-19 18:30:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:04,680 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1435 transitions. [2021-02-19 18:30:04,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1435 transitions. [2021-02-19 18:30:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:30:04,683 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:04,683 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:04,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:04,897 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -378763510, now seen corresponding path program 5 times [2021-02-19 18:30:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:04,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538953056] [2021-02-19 18:30:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538953056] [2021-02-19 18:30:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518527224] [2021-02-19 18:30:05,010 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 [2021-02-19 18:30:05,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:30:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:30:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:05,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:05,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:05,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:05,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 18:30:05,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:05,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:05,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:05,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-02-19 18:30:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:05,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:05,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 18:30:05,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552433092] [2021-02-19 18:30:05,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:30:05,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:30:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:30:05,275 INFO L87 Difference]: Start difference. First operand 591 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:05,493 INFO L93 Difference]: Finished difference Result 1023 states and 2527 transitions. [2021-02-19 18:30:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:30:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:30:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:05,497 INFO L225 Difference]: With dead ends: 1023 [2021-02-19 18:30:05,498 INFO L226 Difference]: Without dead ends: 959 [2021-02-19 18:30:05,498 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:30:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-02-19 18:30:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 607. [2021-02-19 18:30:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.433993399339934) internal successors, (1475), 606 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1475 transitions. [2021-02-19 18:30:05,514 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1475 transitions. Word has length 35 [2021-02-19 18:30:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:05,514 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1475 transitions. [2021-02-19 18:30:05,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1475 transitions. [2021-02-19 18:30:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:30:05,516 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:05,516 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:05,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-02-19 18:30:05,722 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash -86540534, now seen corresponding path program 6 times [2021-02-19 18:30:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:05,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468089829] [2021-02-19 18:30:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468089829] [2021-02-19 18:30:05,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895036453] [2021-02-19 18:30:05,880 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 [2021-02-19 18:30:05,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:30:05,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:05,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:30:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:06,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:06,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:06,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:06,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:06,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 18:30:06,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:06,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:06,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:06,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-02-19 18:30:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:06,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:06,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-02-19 18:30:06,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854341101] [2021-02-19 18:30:06,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:30:06,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:06,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:30:06,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:30:06,096 INFO L87 Difference]: Start difference. First operand 607 states and 1475 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-02-19 18:30:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:06,496 INFO L93 Difference]: Finished difference Result 1319 states and 3177 transitions. [2021-02-19 18:30:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:30:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 35 [2021-02-19 18:30:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:06,501 INFO L225 Difference]: With dead ends: 1319 [2021-02-19 18:30:06,501 INFO L226 Difference]: Without dead ends: 1103 [2021-02-19 18:30:06,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:30:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-02-19 18:30:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 671. [2021-02-19 18:30:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.428358208955224) internal successors, (1627), 670 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1627 transitions. [2021-02-19 18:30:06,519 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1627 transitions. Word has length 35 [2021-02-19 18:30:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:06,519 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1627 transitions. [2021-02-19 18:30:06,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-02-19 18:30:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1627 transitions. [2021-02-19 18:30:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:30:06,521 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:06,521 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:06,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:06,734 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:06,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash 905783562, now seen corresponding path program 7 times [2021-02-19 18:30:06,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:06,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717094949] [2021-02-19 18:30:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:06,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717094949] [2021-02-19 18:30:06,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489122367] [2021-02-19 18:30:06,873 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 [2021-02-19 18:30:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:30:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:07,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 18:30:07,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:07,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:07,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:07,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-02-19 18:30:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:07,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:07,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-02-19 18:30:07,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800034773] [2021-02-19 18:30:07,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:30:07,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:07,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:30:07,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:30:07,116 INFO L87 Difference]: Start difference. First operand 671 states and 1627 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-02-19 18:30:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:07,466 INFO L93 Difference]: Finished difference Result 1239 states and 3075 transitions. [2021-02-19 18:30:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:30:07,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 35 [2021-02-19 18:30:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:07,471 INFO L225 Difference]: With dead ends: 1239 [2021-02-19 18:30:07,471 INFO L226 Difference]: Without dead ends: 1151 [2021-02-19 18:30:07,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:30:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-02-19 18:30:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 543. [2021-02-19 18:30:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.440959409594096) internal successors, (1323), 542 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1323 transitions. [2021-02-19 18:30:07,489 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1323 transitions. Word has length 35 [2021-02-19 18:30:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:07,489 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1323 transitions. [2021-02-19 18:30:07,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-02-19 18:30:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1323 transitions. [2021-02-19 18:30:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:30:07,490 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:07,490 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:07,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:07,700 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1046500106, now seen corresponding path program 8 times [2021-02-19 18:30:07,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:07,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477633488] [2021-02-19 18:30:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:07,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477633488] [2021-02-19 18:30:07,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690459063] [2021-02-19 18:30:07,819 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 [2021-02-19 18:30:07,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:07,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:07,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:30:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:07,959 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 18:30:07,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 18:30:07,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:07,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:07,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:07,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-02-19 18:30:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:07,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:07,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-02-19 18:30:07,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328830278] [2021-02-19 18:30:07,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:30:07,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:30:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:30:07,981 INFO L87 Difference]: Start difference. First operand 543 states and 1323 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:08,224 INFO L93 Difference]: Finished difference Result 787 states and 1911 transitions. [2021-02-19 18:30:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:30:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:30:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:08,227 INFO L225 Difference]: With dead ends: 787 [2021-02-19 18:30:08,227 INFO L226 Difference]: Without dead ends: 751 [2021-02-19 18:30:08,229 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:30:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-02-19 18:30:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 575. [2021-02-19 18:30:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.4442508710801394) internal successors, (1403), 574 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1403 transitions. [2021-02-19 18:30:08,241 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1403 transitions. Word has length 35 [2021-02-19 18:30:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:08,242 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1403 transitions. [2021-02-19 18:30:08,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1403 transitions. [2021-02-19 18:30:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:30:08,243 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:08,243 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:08,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:30:08,461 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:08,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1554734772, now seen corresponding path program 9 times [2021-02-19 18:30:08,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:08,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748659351] [2021-02-19 18:30:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:08,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748659351] [2021-02-19 18:30:08,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395529622] [2021-02-19 18:30:08,494 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) [2021-02-19 18:30:08,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:30:08,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:08,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:30:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:30:08,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:08,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:30:08,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974964809] [2021-02-19 18:30:08,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:30:08,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:30:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:30:08,592 INFO L87 Difference]: Start difference. First operand 575 states and 1403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:08,613 INFO L93 Difference]: Finished difference Result 1199 states and 2863 transitions. [2021-02-19 18:30:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:30:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:30:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:08,617 INFO L225 Difference]: With dead ends: 1199 [2021-02-19 18:30:08,617 INFO L226 Difference]: Without dead ends: 1191 [2021-02-19 18:30:08,618 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:30:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-02-19 18:30:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 671. [2021-02-19 18:30:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.476119402985075) internal successors, (1659), 670 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1659 transitions. [2021-02-19 18:30:08,635 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1659 transitions. Word has length 37 [2021-02-19 18:30:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:08,636 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1659 transitions. [2021-02-19 18:30:08,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1659 transitions. [2021-02-19 18:30:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:08,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:08,637 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:08,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 18:30:08,850 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:08,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1438949192, now seen corresponding path program 10 times [2021-02-19 18:30:08,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:08,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792307198] [2021-02-19 18:30:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:30:09,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792307198] [2021-02-19 18:30:09,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35939442] [2021-02-19 18:30:09,012 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 [2021-02-19 18:30:09,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:09,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:09,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:09,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:09,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 18:30:09,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:09,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:09,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:09,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 18:30:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:09,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:09,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-02-19 18:30:09,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351980213] [2021-02-19 18:30:09,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:30:09,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:09,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:30:09,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:30:09,299 INFO L87 Difference]: Start difference. First operand 671 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-02-19 18:30:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:09,752 INFO L93 Difference]: Finished difference Result 1511 states and 3681 transitions. [2021-02-19 18:30:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:30:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 41 [2021-02-19 18:30:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:09,757 INFO L225 Difference]: With dead ends: 1511 [2021-02-19 18:30:09,757 INFO L226 Difference]: Without dead ends: 1295 [2021-02-19 18:30:09,757 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:30:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-02-19 18:30:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 895. [2021-02-19 18:30:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.446308724832215) internal successors, (2187), 894 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2187 transitions. [2021-02-19 18:30:09,778 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2187 transitions. Word has length 41 [2021-02-19 18:30:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:09,778 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 2187 transitions. [2021-02-19 18:30:09,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-02-19 18:30:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2187 transitions. [2021-02-19 18:30:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:09,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:09,779 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:09,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:30:09,994 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:09,995 INFO L82 PathProgramCache]: Analyzing trace with hash -67714744, now seen corresponding path program 11 times [2021-02-19 18:30:09,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:09,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800682179] [2021-02-19 18:30:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:10,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800682179] [2021-02-19 18:30:10,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920424886] [2021-02-19 18:30:10,179 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 [2021-02-19 18:30:10,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:30:10,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:10,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:10,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:10,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 18:30:10,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:10,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:10,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:10,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 18:30:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:10,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:10,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-02-19 18:30:10,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308839383] [2021-02-19 18:30:10,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:30:10,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:30:10,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:30:10,506 INFO L87 Difference]: Start difference. First operand 895 states and 2187 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-02-19 18:30:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:10,968 INFO L93 Difference]: Finished difference Result 1927 states and 4811 transitions. [2021-02-19 18:30:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:30:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 41 [2021-02-19 18:30:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:10,974 INFO L225 Difference]: With dead ends: 1927 [2021-02-19 18:30:10,974 INFO L226 Difference]: Without dead ends: 1839 [2021-02-19 18:30:10,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:30:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-02-19 18:30:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 991. [2021-02-19 18:30:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.4434343434343435) internal successors, (2419), 990 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2419 transitions. [2021-02-19 18:30:11,000 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2419 transitions. Word has length 41 [2021-02-19 18:30:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:11,000 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 2419 transitions. [2021-02-19 18:30:11,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-02-19 18:30:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2419 transitions. [2021-02-19 18:30:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:11,002 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:11,003 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:11,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:11,223 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:11,226 INFO L82 PathProgramCache]: Analyzing trace with hash -567778488, now seen corresponding path program 12 times [2021-02-19 18:30:11,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:11,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975304579] [2021-02-19 18:30:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:11,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975304579] [2021-02-19 18:30:11,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288606168] [2021-02-19 18:30:11,413 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 [2021-02-19 18:30:11,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:30:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:30:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:11,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:11,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 31 [2021-02-19 18:30:11,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:11,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:11,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:11,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:87, output treesize:7 [2021-02-19 18:30:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:11,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:11,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-02-19 18:30:11,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299480878] [2021-02-19 18:30:11,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:30:11,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:11,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:30:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:30:11,734 INFO L87 Difference]: Start difference. First operand 991 states and 2419 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-02-19 18:30:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:12,253 INFO L93 Difference]: Finished difference Result 1839 states and 4559 transitions. [2021-02-19 18:30:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:30:12,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 41 [2021-02-19 18:30:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:12,260 INFO L225 Difference]: With dead ends: 1839 [2021-02-19 18:30:12,260 INFO L226 Difference]: Without dead ends: 1775 [2021-02-19 18:30:12,260 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:30:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-02-19 18:30:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 991. [2021-02-19 18:30:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.4434343434343435) internal successors, (2419), 990 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2419 transitions. [2021-02-19 18:30:12,284 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2419 transitions. Word has length 41 [2021-02-19 18:30:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:12,284 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 2419 transitions. [2021-02-19 18:30:12,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-02-19 18:30:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2419 transitions. [2021-02-19 18:30:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:12,286 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:12,286 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:12,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:12,498 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1479294648, now seen corresponding path program 13 times [2021-02-19 18:30:12,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:12,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614118738] [2021-02-19 18:30:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614118738] [2021-02-19 18:30:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220272297] [2021-02-19 18:30:12,631 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) [2021-02-19 18:30:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:12,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:12,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:12,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 18:30:12,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:12,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:12,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:12,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 18:30:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:12,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:12,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-02-19 18:30:12,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453537003] [2021-02-19 18:30:12,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:30:12,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:30:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:30:12,904 INFO L87 Difference]: Start difference. First operand 991 states and 2419 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 18:30:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:13,572 INFO L93 Difference]: Finished difference Result 2459 states and 5930 transitions. [2021-02-19 18:30:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:30:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 41 [2021-02-19 18:30:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:13,579 INFO L225 Difference]: With dead ends: 2459 [2021-02-19 18:30:13,580 INFO L226 Difference]: Without dead ends: 2199 [2021-02-19 18:30:13,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:30:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-02-19 18:30:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 1279. [2021-02-19 18:30:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.435837245696401) internal successors, (3113), 1278 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3113 transitions. [2021-02-19 18:30:13,602 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3113 transitions. Word has length 41 [2021-02-19 18:30:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:13,602 INFO L480 AbstractCegarLoop]: Abstraction has 1279 states and 3113 transitions. [2021-02-19 18:30:13,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 18:30:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3113 transitions. [2021-02-19 18:30:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:13,604 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:13,604 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:13,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:13,822 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash 808944968, now seen corresponding path program 14 times [2021-02-19 18:30:13,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:13,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706235788] [2021-02-19 18:30:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:13,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706235788] [2021-02-19 18:30:13,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649828107] [2021-02-19 18:30:13,946 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 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 [2021-02-19 18:30:13,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:13,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:13,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:14,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:14,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:14,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 18:30:14,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:14,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:14,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:14,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 18:30:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:14,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:14,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-02-19 18:30:14,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685431743] [2021-02-19 18:30:14,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:30:14,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:14,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:30:14,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:30:14,219 INFO L87 Difference]: Start difference. First operand 1279 states and 3113 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2021-02-19 18:30:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:14,664 INFO L93 Difference]: Finished difference Result 2543 states and 6246 transitions. [2021-02-19 18:30:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:30:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 41 [2021-02-19 18:30:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:14,673 INFO L225 Difference]: With dead ends: 2543 [2021-02-19 18:30:14,673 INFO L226 Difference]: Without dead ends: 2455 [2021-02-19 18:30:14,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:30:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-02-19 18:30:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1439. [2021-02-19 18:30:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4318497913769126) internal successors, (3497), 1438 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3497 transitions. [2021-02-19 18:30:14,707 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3497 transitions. Word has length 41 [2021-02-19 18:30:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:14,708 INFO L480 AbstractCegarLoop]: Abstraction has 1439 states and 3497 transitions. [2021-02-19 18:30:14,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2021-02-19 18:30:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3497 transitions. [2021-02-19 18:30:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:14,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:14,709 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:14,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 18:30:14,919 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:14,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1605331784, now seen corresponding path program 15 times [2021-02-19 18:30:14,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:14,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945810782] [2021-02-19 18:30:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:15,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945810782] [2021-02-19 18:30:15,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665234241] [2021-02-19 18:30:15,065 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:30:15,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:30:15,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:30:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:15,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:15,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 31 [2021-02-19 18:30:15,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:15,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:15,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:15,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:87, output treesize:7 [2021-02-19 18:30:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:15,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:15,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2021-02-19 18:30:15,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469443477] [2021-02-19 18:30:15,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:30:15,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:15,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:30:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:30:15,315 INFO L87 Difference]: Start difference. First operand 1439 states and 3497 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2021-02-19 18:30:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:15,755 INFO L93 Difference]: Finished difference Result 2643 states and 6503 transitions. [2021-02-19 18:30:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:30:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 41 [2021-02-19 18:30:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:15,762 INFO L225 Difference]: With dead ends: 2643 [2021-02-19 18:30:15,763 INFO L226 Difference]: Without dead ends: 2479 [2021-02-19 18:30:15,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:30:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-02-19 18:30:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1535. [2021-02-19 18:30:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 2.4361147327249024) internal successors, (3737), 1534 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 3737 transitions. [2021-02-19 18:30:15,795 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 3737 transitions. Word has length 41 [2021-02-19 18:30:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:15,796 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 3737 transitions. [2021-02-19 18:30:15,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2021-02-19 18:30:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 3737 transitions. [2021-02-19 18:30:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:15,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:15,798 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:16,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 18:30:16,010 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash -401395896, now seen corresponding path program 16 times [2021-02-19 18:30:16,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:16,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799680581] [2021-02-19 18:30:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:16,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799680581] [2021-02-19 18:30:16,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967867207] [2021-02-19 18:30:16,162 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 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 [2021-02-19 18:30:16,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:16,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:16,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:16,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:16,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:16,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:16,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 18:30:16,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:16,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:16,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:16,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 18:30:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:16,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:16,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-02-19 18:30:16,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751730619] [2021-02-19 18:30:16,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:30:16,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:16,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:30:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:30:16,443 INFO L87 Difference]: Start difference. First operand 1535 states and 3737 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-02-19 18:30:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:16,867 INFO L93 Difference]: Finished difference Result 2743 states and 6761 transitions. [2021-02-19 18:30:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:30:16,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 41 [2021-02-19 18:30:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:16,873 INFO L225 Difference]: With dead ends: 2743 [2021-02-19 18:30:16,873 INFO L226 Difference]: Without dead ends: 2655 [2021-02-19 18:30:16,873 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:30:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-02-19 18:30:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1471. [2021-02-19 18:30:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.433333333333333) internal successors, (3577), 1470 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3577 transitions. [2021-02-19 18:30:16,904 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3577 transitions. Word has length 41 [2021-02-19 18:30:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:16,904 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 3577 transitions. [2021-02-19 18:30:16,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-02-19 18:30:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3577 transitions. [2021-02-19 18:30:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:30:16,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:16,906 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:17,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:30:17,122 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash 73683272, now seen corresponding path program 17 times [2021-02-19 18:30:17,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:17,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17249515] [2021-02-19 18:30:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17249515] [2021-02-19 18:30:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945286728] [2021-02-19 18:30:17,275 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 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 [2021-02-19 18:30:17,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:30:17,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:17,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:30:17,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:17,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:17,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:17,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 18:30:17,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:17,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:17,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:17,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 18:30:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:17,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:17,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-02-19 18:30:17,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111155372] [2021-02-19 18:30:17,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:30:17,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:30:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:30:17,572 INFO L87 Difference]: Start difference. First operand 1471 states and 3577 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:18,205 INFO L93 Difference]: Finished difference Result 2603 states and 6280 transitions. [2021-02-19 18:30:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:30:18,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:30:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:18,210 INFO L225 Difference]: With dead ends: 2603 [2021-02-19 18:30:18,210 INFO L226 Difference]: Without dead ends: 2327 [2021-02-19 18:30:18,210 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:30:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-02-19 18:30:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 1647. [2021-02-19 18:30:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 2.4343863912515187) internal successors, (4007), 1646 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 4007 transitions. [2021-02-19 18:30:18,243 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 4007 transitions. Word has length 41 [2021-02-19 18:30:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:18,243 INFO L480 AbstractCegarLoop]: Abstraction has 1647 states and 4007 transitions. [2021-02-19 18:30:18,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 4007 transitions. [2021-02-19 18:30:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:18,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:18,247 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:18,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:30:18,462 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:18,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:18,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1758524186, now seen corresponding path program 18 times [2021-02-19 18:30:18,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:18,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691772089] [2021-02-19 18:30:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:30:18,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691772089] [2021-02-19 18:30:18,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681440002] [2021-02-19 18:30:18,640 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 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 [2021-02-19 18:30:18,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:30:18,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:18,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:18,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:19,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:19,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:19,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:19,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:19,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:19,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:19,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:19,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-02-19 18:30:19,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004448351] [2021-02-19 18:30:19,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:30:19,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:30:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:30:19,111 INFO L87 Difference]: Start difference. First operand 1647 states and 4007 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:19,691 INFO L93 Difference]: Finished difference Result 2975 states and 7331 transitions. [2021-02-19 18:30:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 18:30:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:19,697 INFO L225 Difference]: With dead ends: 2975 [2021-02-19 18:30:19,697 INFO L226 Difference]: Without dead ends: 2911 [2021-02-19 18:30:19,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:30:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-02-19 18:30:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1695. [2021-02-19 18:30:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 2.4315230224321134) internal successors, (4119), 1694 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 4119 transitions. [2021-02-19 18:30:19,731 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 4119 transitions. Word has length 47 [2021-02-19 18:30:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:19,732 INFO L480 AbstractCegarLoop]: Abstraction has 1695 states and 4119 transitions. [2021-02-19 18:30:19,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 4119 transitions. [2021-02-19 18:30:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:19,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:19,735 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:19,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 18:30:19,953 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash 27058918, now seen corresponding path program 19 times [2021-02-19 18:30:19,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:19,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620184656] [2021-02-19 18:30:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:20,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620184656] [2021-02-19 18:30:20,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57225904] [2021-02-19 18:30:20,128 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:30:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:20,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:20,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:20,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:20,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:20,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:20,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:20,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:20,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:20,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:20,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:20,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-02-19 18:30:20,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027359892] [2021-02-19 18:30:20,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:30:20,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:20,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:30:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:30:20,532 INFO L87 Difference]: Start difference. First operand 1695 states and 4119 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:21,086 INFO L93 Difference]: Finished difference Result 2523 states and 6155 transitions. [2021-02-19 18:30:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 18:30:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:21,092 INFO L225 Difference]: With dead ends: 2523 [2021-02-19 18:30:21,092 INFO L226 Difference]: Without dead ends: 2463 [2021-02-19 18:30:21,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:30:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-02-19 18:30:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1519. [2021-02-19 18:30:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.4301712779973648) internal successors, (3689), 1518 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3689 transitions. [2021-02-19 18:30:21,121 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3689 transitions. Word has length 47 [2021-02-19 18:30:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:21,121 INFO L480 AbstractCegarLoop]: Abstraction has 1519 states and 3689 transitions. [2021-02-19 18:30:21,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3689 transitions. [2021-02-19 18:30:21,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:21,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:21,124 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:21,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:21,338 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:21,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:21,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1160099558, now seen corresponding path program 20 times [2021-02-19 18:30:21,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:21,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452767364] [2021-02-19 18:30:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:21,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452767364] [2021-02-19 18:30:21,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373891142] [2021-02-19 18:30:21,518 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 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 [2021-02-19 18:30:21,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:30:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:21,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:21,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:21,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:21,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 36 [2021-02-19 18:30:21,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:21,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:21,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:21,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:104, output treesize:7 [2021-02-19 18:30:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:21,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:21,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-02-19 18:30:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530190054] [2021-02-19 18:30:21,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:30:21,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:21,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:30:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:30:21,919 INFO L87 Difference]: Start difference. First operand 1519 states and 3689 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:22,723 INFO L93 Difference]: Finished difference Result 3127 states and 7753 transitions. [2021-02-19 18:30:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 18:30:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:22,730 INFO L225 Difference]: With dead ends: 3127 [2021-02-19 18:30:22,730 INFO L226 Difference]: Without dead ends: 3039 [2021-02-19 18:30:22,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:30:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-02-19 18:30:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1279. [2021-02-19 18:30:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.448356807511737) internal successors, (3129), 1278 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3129 transitions. [2021-02-19 18:30:22,759 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3129 transitions. Word has length 47 [2021-02-19 18:30:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:22,759 INFO L480 AbstractCegarLoop]: Abstraction has 1279 states and 3129 transitions. [2021-02-19 18:30:22,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3129 transitions. [2021-02-19 18:30:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:22,762 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:22,762 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:22,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:30:22,982 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1821181158, now seen corresponding path program 21 times [2021-02-19 18:30:22,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:22,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118741886] [2021-02-19 18:30:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:23,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118741886] [2021-02-19 18:30:23,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497728541] [2021-02-19 18:30:23,189 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 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 [2021-02-19 18:30:23,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:30:23,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:23,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:30:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:23,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:23,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:23,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 36 [2021-02-19 18:30:23,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:23,686 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:30:23,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:23,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:104, output treesize:7 [2021-02-19 18:30:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:23,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:23,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-02-19 18:30:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200147120] [2021-02-19 18:30:23,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:30:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:30:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:30:23,707 INFO L87 Difference]: Start difference. First operand 1279 states and 3129 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:24,810 INFO L93 Difference]: Finished difference Result 2523 states and 6145 transitions. [2021-02-19 18:30:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:30:24,810 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 18:30:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:24,813 INFO L225 Difference]: With dead ends: 2523 [2021-02-19 18:30:24,813 INFO L226 Difference]: Without dead ends: 2287 [2021-02-19 18:30:24,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:30:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-02-19 18:30:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1487. [2021-02-19 18:30:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.4448183041722746) internal successors, (3633), 1486 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3633 transitions. [2021-02-19 18:30:24,833 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3633 transitions. Word has length 47 [2021-02-19 18:30:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:24,834 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 3633 transitions. [2021-02-19 18:30:24,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3633 transitions. [2021-02-19 18:30:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:24,835 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:24,835 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:25,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:25,050 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1340745498, now seen corresponding path program 22 times [2021-02-19 18:30:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52160488] [2021-02-19 18:30:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:25,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52160488] [2021-02-19 18:30:25,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354144639] [2021-02-19 18:30:25,238 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 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 [2021-02-19 18:30:25,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:25,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:30:25,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:25,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:25,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:25,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:25,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:25,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 36 [2021-02-19 18:30:25,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:25,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:25,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:25,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:104, output treesize:7 [2021-02-19 18:30:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:25,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:25,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-02-19 18:30:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754811224] [2021-02-19 18:30:25,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:30:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:30:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:30:25,665 INFO L87 Difference]: Start difference. First operand 1487 states and 3633 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:26,250 INFO L93 Difference]: Finished difference Result 2887 states and 7177 transitions. [2021-02-19 18:30:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:26,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 18:30:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:26,254 INFO L225 Difference]: With dead ends: 2887 [2021-02-19 18:30:26,254 INFO L226 Difference]: Without dead ends: 2799 [2021-02-19 18:30:26,255 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:30:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-02-19 18:30:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1311. [2021-02-19 18:30:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 2.449618320610687) internal successors, (3209), 1310 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 3209 transitions. [2021-02-19 18:30:26,282 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 3209 transitions. Word has length 47 [2021-02-19 18:30:26,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:26,282 INFO L480 AbstractCegarLoop]: Abstraction has 1311 states and 3209 transitions. [2021-02-19 18:30:26,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 3209 transitions. [2021-02-19 18:30:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:26,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:26,284 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:26,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:30:26,492 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash 743867110, now seen corresponding path program 23 times [2021-02-19 18:30:26,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:26,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754356615] [2021-02-19 18:30:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:26,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754356615] [2021-02-19 18:30:26,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601149264] [2021-02-19 18:30:26,689 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:30:26,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:30:26,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:26,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:27,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:27,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:27,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:27,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:27,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:27,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:27,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:27,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-02-19 18:30:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135802632] [2021-02-19 18:30:27,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:30:27,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:27,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:30:27,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:30:27,128 INFO L87 Difference]: Start difference. First operand 1311 states and 3209 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:27,628 INFO L93 Difference]: Finished difference Result 1875 states and 4605 transitions. [2021-02-19 18:30:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:30:27,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 18:30:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:27,630 INFO L225 Difference]: With dead ends: 1875 [2021-02-19 18:30:27,630 INFO L226 Difference]: Without dead ends: 1839 [2021-02-19 18:30:27,631 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:30:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-02-19 18:30:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1327. [2021-02-19 18:30:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.4502262443438916) internal successors, (3249), 1326 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3249 transitions. [2021-02-19 18:30:27,651 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3249 transitions. Word has length 47 [2021-02-19 18:30:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:27,651 INFO L480 AbstractCegarLoop]: Abstraction has 1327 states and 3249 transitions. [2021-02-19 18:30:27,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3249 transitions. [2021-02-19 18:30:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:27,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:27,653 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:27,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:27,853 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash 184820966, now seen corresponding path program 24 times [2021-02-19 18:30:27,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:27,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132308247] [2021-02-19 18:30:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:28,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132308247] [2021-02-19 18:30:28,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957525543] [2021-02-19 18:30:28,049 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 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 [2021-02-19 18:30:28,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:30:28,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:28,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:30:28,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:28,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 36 [2021-02-19 18:30:28,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:28,536 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:30:28,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:28,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:108, output treesize:7 [2021-02-19 18:30:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:28,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:28,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-02-19 18:30:28,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474561914] [2021-02-19 18:30:28,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:30:28,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:28,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:30:28,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:30:28,558 INFO L87 Difference]: Start difference. First operand 1327 states and 3249 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-02-19 18:30:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:29,839 INFO L93 Difference]: Finished difference Result 3043 states and 7429 transitions. [2021-02-19 18:30:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:30:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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 47 [2021-02-19 18:30:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:29,843 INFO L225 Difference]: With dead ends: 3043 [2021-02-19 18:30:29,844 INFO L226 Difference]: Without dead ends: 2687 [2021-02-19 18:30:29,844 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:30:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-02-19 18:30:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1407. [2021-02-19 18:30:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 2.4587482219061165) internal successors, (3457), 1406 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 3457 transitions. [2021-02-19 18:30:29,870 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 3457 transitions. Word has length 47 [2021-02-19 18:30:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:29,870 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 3457 transitions. [2021-02-19 18:30:29,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-02-19 18:30:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 3457 transitions. [2021-02-19 18:30:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:29,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:29,872 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:30,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 18:30:30,090 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1632760602, now seen corresponding path program 25 times [2021-02-19 18:30:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805807932] [2021-02-19 18:30:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:30,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805807932] [2021-02-19 18:30:30,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749019276] [2021-02-19 18:30:30,304 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 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 [2021-02-19 18:30:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:30,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:30,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:30,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:30,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:30,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:30,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:30,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:30,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:30,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:30,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:30,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-02-19 18:30:30,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62180048] [2021-02-19 18:30:30,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:30:30,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:30,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:30:30,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:30:30,656 INFO L87 Difference]: Start difference. First operand 1407 states and 3457 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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) [2021-02-19 18:30:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:31,578 INFO L93 Difference]: Finished difference Result 3043 states and 7393 transitions. [2021-02-19 18:30:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:30:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 47 [2021-02-19 18:30:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:31,582 INFO L225 Difference]: With dead ends: 3043 [2021-02-19 18:30:31,582 INFO L226 Difference]: Without dead ends: 2735 [2021-02-19 18:30:31,582 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:30:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-02-19 18:30:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 1711. [2021-02-19 18:30:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 2.4473684210526314) internal successors, (4185), 1710 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 4185 transitions. [2021-02-19 18:30:31,605 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 4185 transitions. Word has length 47 [2021-02-19 18:30:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:31,605 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 4185 transitions. [2021-02-19 18:30:31,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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) [2021-02-19 18:30:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 4185 transitions. [2021-02-19 18:30:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:31,607 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:31,607 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:31,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:31,822 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:31,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1445908710, now seen corresponding path program 26 times [2021-02-19 18:30:31,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:31,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505196643] [2021-02-19 18:30:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:32,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505196643] [2021-02-19 18:30:32,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314168688] [2021-02-19 18:30:32,027 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 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 [2021-02-19 18:30:32,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:32,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:32,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:32,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:32,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:32,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:32,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:32,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:32,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:32,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:32,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-02-19 18:30:32,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711059298] [2021-02-19 18:30:32,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:30:32,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:30:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:30:32,375 INFO L87 Difference]: Start difference. First operand 1711 states and 4185 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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) [2021-02-19 18:30:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:33,435 INFO L93 Difference]: Finished difference Result 2819 states and 6801 transitions. [2021-02-19 18:30:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:30:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 47 [2021-02-19 18:30:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:33,439 INFO L225 Difference]: With dead ends: 2819 [2021-02-19 18:30:33,440 INFO L226 Difference]: Without dead ends: 2491 [2021-02-19 18:30:33,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:30:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-02-19 18:30:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1227. [2021-02-19 18:30:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 2.4200652528548123) internal successors, (2967), 1226 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 2967 transitions. [2021-02-19 18:30:33,465 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 2967 transitions. Word has length 47 [2021-02-19 18:30:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:33,465 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 2967 transitions. [2021-02-19 18:30:33,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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) [2021-02-19 18:30:33,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 2967 transitions. [2021-02-19 18:30:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:33,467 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:33,467 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:33,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:30:33,668 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:33,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash 368594662, now seen corresponding path program 27 times [2021-02-19 18:30:33,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:33,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979779571] [2021-02-19 18:30:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:33,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979779571] [2021-02-19 18:30:33,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915210748] [2021-02-19 18:30:33,875 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 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 [2021-02-19 18:30:33,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:30:33,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:34,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:34,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:34,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:34,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:34,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:34,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:34,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:34,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-02-19 18:30:34,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55895531] [2021-02-19 18:30:34,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:30:34,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:34,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:30:34,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:30:34,275 INFO L87 Difference]: Start difference. First operand 1227 states and 2967 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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) [2021-02-19 18:30:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:35,039 INFO L93 Difference]: Finished difference Result 2463 states and 6027 transitions. [2021-02-19 18:30:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 47 [2021-02-19 18:30:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:35,042 INFO L225 Difference]: With dead ends: 2463 [2021-02-19 18:30:35,042 INFO L226 Difference]: Without dead ends: 2331 [2021-02-19 18:30:35,043 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:30:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-02-19 18:30:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1291. [2021-02-19 18:30:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 2.424031007751938) internal successors, (3127), 1290 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3127 transitions. [2021-02-19 18:30:35,069 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3127 transitions. Word has length 47 [2021-02-19 18:30:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:35,069 INFO L480 AbstractCegarLoop]: Abstraction has 1291 states and 3127 transitions. [2021-02-19 18:30:35,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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) [2021-02-19 18:30:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3127 transitions. [2021-02-19 18:30:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:35,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:35,071 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:35,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:35,282 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash -979471642, now seen corresponding path program 28 times [2021-02-19 18:30:35,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:35,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150716478] [2021-02-19 18:30:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:35,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150716478] [2021-02-19 18:30:35,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101304006] [2021-02-19 18:30:35,483 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 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 [2021-02-19 18:30:35,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:35,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:35,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:35,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:35,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:35,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:35,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:35,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:35,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:35,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:35,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:35,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-02-19 18:30:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105657237] [2021-02-19 18:30:35,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:30:35,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:30:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:30:35,821 INFO L87 Difference]: Start difference. First operand 1291 states and 3127 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-02-19 18:30:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:36,693 INFO L93 Difference]: Finished difference Result 2911 states and 7031 transitions. [2021-02-19 18:30:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:30:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 47 [2021-02-19 18:30:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:36,697 INFO L225 Difference]: With dead ends: 2911 [2021-02-19 18:30:36,697 INFO L226 Difference]: Without dead ends: 2583 [2021-02-19 18:30:36,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:30:36,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-02-19 18:30:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1607. [2021-02-19 18:30:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 2.4227895392278955) internal successors, (3891), 1606 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 3891 transitions. [2021-02-19 18:30:36,723 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 3891 transitions. Word has length 47 [2021-02-19 18:30:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:36,724 INFO L480 AbstractCegarLoop]: Abstraction has 1607 states and 3891 transitions. [2021-02-19 18:30:36,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-02-19 18:30:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 3891 transitions. [2021-02-19 18:30:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:36,726 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:36,726 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:36,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:30:36,926 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash 12852454, now seen corresponding path program 29 times [2021-02-19 18:30:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:36,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719701186] [2021-02-19 18:30:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:37,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719701186] [2021-02-19 18:30:37,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731696855] [2021-02-19 18:30:37,097 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 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 [2021-02-19 18:30:37,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:30:37,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:37,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:30:37,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:37,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:37,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:37,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2021-02-19 18:30:37,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:37,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:37,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:37,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:3 [2021-02-19 18:30:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:37,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:37,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-02-19 18:30:37,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768985249] [2021-02-19 18:30:37,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:30:37,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:37,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:30:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:30:37,544 INFO L87 Difference]: Start difference. First operand 1607 states and 3891 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:38,822 INFO L93 Difference]: Finished difference Result 3339 states and 8111 transitions. [2021-02-19 18:30:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:30:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 18:30:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:38,827 INFO L225 Difference]: With dead ends: 3339 [2021-02-19 18:30:38,828 INFO L226 Difference]: Without dead ends: 3095 [2021-02-19 18:30:38,828 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:30:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-02-19 18:30:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 1591. [2021-02-19 18:30:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 2.422012578616352) internal successors, (3851), 1590 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 3851 transitions. [2021-02-19 18:30:38,858 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 3851 transitions. Word has length 47 [2021-02-19 18:30:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:38,858 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 3851 transitions. [2021-02-19 18:30:38,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 3851 transitions. [2021-02-19 18:30:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:38,861 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:38,861 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:39,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:30:39,068 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:39,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2056785690, now seen corresponding path program 30 times [2021-02-19 18:30:39,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:39,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376001803] [2021-02-19 18:30:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:39,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376001803] [2021-02-19 18:30:39,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193961549] [2021-02-19 18:30:39,295 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 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 [2021-02-19 18:30:39,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:30:39,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:39,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:39,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:39,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:39,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:39,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:39,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 18:30:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:39,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:39,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-02-19 18:30:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633267158] [2021-02-19 18:30:39,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:30:39,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:39,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:30:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:30:39,671 INFO L87 Difference]: Start difference. First operand 1591 states and 3851 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2021-02-19 18:30:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:40,466 INFO L93 Difference]: Finished difference Result 3067 states and 7511 transitions. [2021-02-19 18:30:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 47 [2021-02-19 18:30:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:40,469 INFO L225 Difference]: With dead ends: 3067 [2021-02-19 18:30:40,470 INFO L226 Difference]: Without dead ends: 2983 [2021-02-19 18:30:40,470 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:30:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-02-19 18:30:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1703. [2021-02-19 18:30:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.427144535840188) internal successors, (4131), 1702 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 4131 transitions. [2021-02-19 18:30:40,502 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 4131 transitions. Word has length 47 [2021-02-19 18:30:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:40,502 INFO L480 AbstractCegarLoop]: Abstraction has 1703 states and 4131 transitions. [2021-02-19 18:30:40,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2021-02-19 18:30:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 4131 transitions. [2021-02-19 18:30:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 18:30:40,504 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:40,504 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:40,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:30:40,718 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash -198829338, now seen corresponding path program 31 times [2021-02-19 18:30:40,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:40,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805693881] [2021-02-19 18:30:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805693881] [2021-02-19 18:30:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730999877] [2021-02-19 18:30:40,931 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 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 [2021-02-19 18:30:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:40,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:30:40,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:41,215 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-02-19 18:30:41,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 18:30:41,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:41,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:41,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:41,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-02-19 18:30:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:41,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:41,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-02-19 18:30:41,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866576331] [2021-02-19 18:30:41,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:30:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:41,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:30:41,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:30:41,241 INFO L87 Difference]: Start difference. First operand 1703 states and 4131 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-02-19 18:30:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:41,754 INFO L93 Difference]: Finished difference Result 2539 states and 6191 transitions. [2021-02-19 18:30:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:30:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 47 [2021-02-19 18:30:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:41,758 INFO L225 Difference]: With dead ends: 2539 [2021-02-19 18:30:41,758 INFO L226 Difference]: Without dead ends: 2503 [2021-02-19 18:30:41,758 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:30:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-02-19 18:30:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1735. [2021-02-19 18:30:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 2.428489042675894) internal successors, (4211), 1734 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 4211 transitions. [2021-02-19 18:30:41,786 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 4211 transitions. Word has length 47 [2021-02-19 18:30:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:41,787 INFO L480 AbstractCegarLoop]: Abstraction has 1735 states and 4211 transitions. [2021-02-19 18:30:41,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-02-19 18:30:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 4211 transitions. [2021-02-19 18:30:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-19 18:30:41,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:41,789 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:41,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 18:30:41,998 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash -327267800, now seen corresponding path program 32 times [2021-02-19 18:30:41,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:41,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878019144] [2021-02-19 18:30:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:30:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878019144] [2021-02-19 18:30:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277219261] [2021-02-19 18:30:42,039 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:30:42,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:42,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:30:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:30:42,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:42,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:30:42,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344741082] [2021-02-19 18:30:42,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:30:42,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:30:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:30:42,136 INFO L87 Difference]: Start difference. First operand 1735 states and 4211 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-02-19 18:30:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:42,162 INFO L93 Difference]: Finished difference Result 2715 states and 6546 transitions. [2021-02-19 18:30:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:30:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 49 [2021-02-19 18:30:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:42,166 INFO L225 Difference]: With dead ends: 2715 [2021-02-19 18:30:42,166 INFO L226 Difference]: Without dead ends: 2707 [2021-02-19 18:30:42,166 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:30:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2021-02-19 18:30:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2303. [2021-02-19 18:30:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.4652476107732406) internal successors, (5675), 2302 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5675 transitions. [2021-02-19 18:30:42,197 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5675 transitions. Word has length 49 [2021-02-19 18:30:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:42,198 INFO L480 AbstractCegarLoop]: Abstraction has 2303 states and 5675 transitions. [2021-02-19 18:30:42,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-02-19 18:30:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5675 transitions. [2021-02-19 18:30:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-19 18:30:42,200 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:42,200 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:42,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 18:30:42,414 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -20454872, now seen corresponding path program 33 times [2021-02-19 18:30:42,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:42,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081409287] [2021-02-19 18:30:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:42,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081409287] [2021-02-19 18:30:42,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955118192] [2021-02-19 18:30:42,452 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 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 [2021-02-19 18:30:42,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:30:42,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:30:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:30:42,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:42,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 18:30:42,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989724523] [2021-02-19 18:30:42,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:30:42,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:42,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:30:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:30:42,561 INFO L87 Difference]: Start difference. First operand 2303 states and 5675 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:42,606 INFO L93 Difference]: Finished difference Result 3575 states and 8725 transitions. [2021-02-19 18:30:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:30:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-02-19 18:30:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:42,612 INFO L225 Difference]: With dead ends: 3575 [2021-02-19 18:30:42,612 INFO L226 Difference]: Without dead ends: 3567 [2021-02-19 18:30:42,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:30:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-02-19 18:30:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 2511. [2021-02-19 18:30:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2510 states have (on average 2.4745019920318727) internal successors, (6211), 2510 states have internal predecessors, (6211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 6211 transitions. [2021-02-19 18:30:42,655 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 6211 transitions. Word has length 49 [2021-02-19 18:30:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:42,655 INFO L480 AbstractCegarLoop]: Abstraction has 2511 states and 6211 transitions. [2021-02-19 18:30:42,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 6211 transitions. [2021-02-19 18:30:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:42,660 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:42,660 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:42,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:30:42,871 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:42,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1574019036, now seen corresponding path program 34 times [2021-02-19 18:30:42,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:42,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175840490] [2021-02-19 18:30:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:43,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175840490] [2021-02-19 18:30:43,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439436136] [2021-02-19 18:30:43,147 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 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 [2021-02-19 18:30:43,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:43,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:30:43,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:43,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:43,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:43,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:43,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:43,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 43 [2021-02-19 18:30:43,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:43,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:43,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:43,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:123, output treesize:7 [2021-02-19 18:30:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:43,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:43,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-02-19 18:30:43,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179636411] [2021-02-19 18:30:43,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:30:43,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:30:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:30:43,753 INFO L87 Difference]: Start difference. First operand 2511 states and 6211 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:44,885 INFO L93 Difference]: Finished difference Result 6407 states and 16051 transitions. [2021-02-19 18:30:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:30:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:30:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:44,896 INFO L225 Difference]: With dead ends: 6407 [2021-02-19 18:30:44,896 INFO L226 Difference]: Without dead ends: 6271 [2021-02-19 18:30:44,897 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:30:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2021-02-19 18:30:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 2895. [2021-02-19 18:30:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2895 states, 2894 states have (on average 2.4668279198341394) internal successors, (7139), 2894 states have internal predecessors, (7139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2895 states to 2895 states and 7139 transitions. [2021-02-19 18:30:44,953 INFO L78 Accepts]: Start accepts. Automaton has 2895 states and 7139 transitions. Word has length 53 [2021-02-19 18:30:44,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:44,954 INFO L480 AbstractCegarLoop]: Abstraction has 2895 states and 7139 transitions. [2021-02-19 18:30:44,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2895 states and 7139 transitions. [2021-02-19 18:30:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:44,958 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:44,958 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:45,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 18:30:45,178 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:45,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1392704988, now seen corresponding path program 35 times [2021-02-19 18:30:45,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:45,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492709367] [2021-02-19 18:30:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:45,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492709367] [2021-02-19 18:30:45,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308451377] [2021-02-19 18:30:45,426 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 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 [2021-02-19 18:30:45,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:30:45,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:30:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:45,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:45,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:45,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:46,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:46,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:46,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:46,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:30:46,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:46,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:46,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:46,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:30:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:46,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:46,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-02-19 18:30:46,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386256645] [2021-02-19 18:30:46,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:30:46,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:30:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:30:46,060 INFO L87 Difference]: Start difference. First operand 2895 states and 7139 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:47,358 INFO L93 Difference]: Finished difference Result 6423 states and 16107 transitions. [2021-02-19 18:30:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:30:47,359 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:30:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:47,368 INFO L225 Difference]: With dead ends: 6423 [2021-02-19 18:30:47,368 INFO L226 Difference]: Without dead ends: 6287 [2021-02-19 18:30:47,369 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:30:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-02-19 18:30:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 2415. [2021-02-19 18:30:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2414 states have (on average 2.473487986743993) internal successors, (5971), 2414 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 5971 transitions. [2021-02-19 18:30:47,416 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 5971 transitions. Word has length 53 [2021-02-19 18:30:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:47,416 INFO L480 AbstractCegarLoop]: Abstraction has 2415 states and 5971 transitions. [2021-02-19 18:30:47,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 5971 transitions. [2021-02-19 18:30:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:47,419 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:47,419 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:47,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:47,620 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:47,620 INFO L82 PathProgramCache]: Analyzing trace with hash 937510436, now seen corresponding path program 36 times [2021-02-19 18:30:47,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:47,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160314789] [2021-02-19 18:30:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:30:47,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160314789] [2021-02-19 18:30:47,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694051480] [2021-02-19 18:30:47,835 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:30:47,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:30:47,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:47,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:30:47,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:48,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:48,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:48,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:48,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:48,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:48,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:30:48,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:48,455 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:30:48,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:48,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:129, output treesize:7 [2021-02-19 18:30:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 11 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:48,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:48,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-02-19 18:30:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558607811] [2021-02-19 18:30:48,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:30:48,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:30:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:30:48,483 INFO L87 Difference]: Start difference. First operand 2415 states and 5971 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:50,007 INFO L93 Difference]: Finished difference Result 4055 states and 9969 transitions. [2021-02-19 18:30:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:30:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:30:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:50,013 INFO L225 Difference]: With dead ends: 4055 [2021-02-19 18:30:50,013 INFO L226 Difference]: Without dead ends: 3743 [2021-02-19 18:30:50,014 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:30:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-02-19 18:30:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 2815. [2021-02-19 18:30:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2814 states have (on average 2.4601990049751246) internal successors, (6923), 2814 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 6923 transitions. [2021-02-19 18:30:50,067 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 6923 transitions. Word has length 53 [2021-02-19 18:30:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:50,067 INFO L480 AbstractCegarLoop]: Abstraction has 2815 states and 6923 transitions. [2021-02-19 18:30:50,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 6923 transitions. [2021-02-19 18:30:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:50,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:50,071 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:50,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:50,272 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash -569153500, now seen corresponding path program 37 times [2021-02-19 18:30:50,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:50,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920739687] [2021-02-19 18:30:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:50,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920739687] [2021-02-19 18:30:50,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830669390] [2021-02-19 18:30:50,507 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 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 [2021-02-19 18:30:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:30:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:51,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:51,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:51,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:51,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:51,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 43 [2021-02-19 18:30:51,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:51,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:51,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:51,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:123, output treesize:7 [2021-02-19 18:30:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:51,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:51,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-02-19 18:30:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376548639] [2021-02-19 18:30:51,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:30:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:30:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:30:51,080 INFO L87 Difference]: Start difference. First operand 2815 states and 6923 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:51,937 INFO L93 Difference]: Finished difference Result 5255 states and 13107 transitions. [2021-02-19 18:30:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:30:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:51,945 INFO L225 Difference]: With dead ends: 5255 [2021-02-19 18:30:51,945 INFO L226 Difference]: Without dead ends: 5167 [2021-02-19 18:30:51,946 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:30:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2021-02-19 18:30:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 2783. [2021-02-19 18:30:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.459741193386053) internal successors, (6843), 2782 states have internal predecessors, (6843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 6843 transitions. [2021-02-19 18:30:52,024 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 6843 transitions. Word has length 53 [2021-02-19 18:30:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:52,024 INFO L480 AbstractCegarLoop]: Abstraction has 2783 states and 6843 transitions. [2021-02-19 18:30:52,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 6843 transitions. [2021-02-19 18:30:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:52,028 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:52,028 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:52,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:52,235 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:52,236 INFO L82 PathProgramCache]: Analyzing trace with hash -594138076, now seen corresponding path program 38 times [2021-02-19 18:30:52,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:52,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67022855] [2021-02-19 18:30:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:52,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67022855] [2021-02-19 18:30:52,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395902907] [2021-02-19 18:30:52,501 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 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 [2021-02-19 18:30:52,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:52,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:30:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:53,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:53,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:53,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 43 [2021-02-19 18:30:53,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:53,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:53,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:53,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:123, output treesize:7 [2021-02-19 18:30:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:53,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:53,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-02-19 18:30:53,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591934731] [2021-02-19 18:30:53,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:30:53,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:30:53,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:30:53,127 INFO L87 Difference]: Start difference. First operand 2783 states and 6843 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:54,072 INFO L93 Difference]: Finished difference Result 5719 states and 14243 transitions. [2021-02-19 18:30:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:30:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:30:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:54,080 INFO L225 Difference]: With dead ends: 5719 [2021-02-19 18:30:54,080 INFO L226 Difference]: Without dead ends: 5631 [2021-02-19 18:30:54,081 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:30:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-02-19 18:30:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 2719. [2021-02-19 18:30:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.458793230316409) internal successors, (6683), 2718 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 6683 transitions. [2021-02-19 18:30:54,137 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 6683 transitions. Word has length 53 [2021-02-19 18:30:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:54,138 INFO L480 AbstractCegarLoop]: Abstraction has 2719 states and 6683 transitions. [2021-02-19 18:30:54,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 6683 transitions. [2021-02-19 18:30:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:54,141 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:54,141 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:54,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 18:30:54,342 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash 690408996, now seen corresponding path program 39 times [2021-02-19 18:30:54,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:54,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365898908] [2021-02-19 18:30:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:54,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365898908] [2021-02-19 18:30:54,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890380223] [2021-02-19 18:30:54,613 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 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 [2021-02-19 18:30:54,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:30:54,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:54,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:30:54,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:55,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:55,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:55,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:55,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:55,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:55,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 43 [2021-02-19 18:30:55,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:55,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:55,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:55,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:123, output treesize:7 [2021-02-19 18:30:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:55,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:55,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-02-19 18:30:55,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124252209] [2021-02-19 18:30:55,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:30:55,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:30:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:30:55,249 INFO L87 Difference]: Start difference. First operand 2719 states and 6683 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:56,416 INFO L93 Difference]: Finished difference Result 4391 states and 10867 transitions. [2021-02-19 18:30:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:30:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:30:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:56,422 INFO L225 Difference]: With dead ends: 4391 [2021-02-19 18:30:56,423 INFO L226 Difference]: Without dead ends: 4351 [2021-02-19 18:30:56,423 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:30:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-02-19 18:30:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 2735. [2021-02-19 18:30:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2734 states have (on average 2.4590343818580833) internal successors, (6723), 2734 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 6723 transitions. [2021-02-19 18:30:56,467 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 6723 transitions. Word has length 53 [2021-02-19 18:30:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:56,467 INFO L480 AbstractCegarLoop]: Abstraction has 2735 states and 6723 transitions. [2021-02-19 18:30:56,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 6723 transitions. [2021-02-19 18:30:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:56,471 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:56,471 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:56,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:56,674 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:56,675 INFO L82 PathProgramCache]: Analyzing trace with hash -125859292, now seen corresponding path program 40 times [2021-02-19 18:30:56,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:56,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61461268] [2021-02-19 18:30:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:30:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61461268] [2021-02-19 18:30:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549552737] [2021-02-19 18:30:56,902 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 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 [2021-02-19 18:30:56,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:56,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:30:56,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:57,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:57,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:57,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:30:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:30:57,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:30:57,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:57,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:57,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:57,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:30:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:57,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:57,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-02-19 18:30:57,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557528316] [2021-02-19 18:30:57,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:30:57,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:57,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:30:57,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:30:57,479 INFO L87 Difference]: Start difference. First operand 2735 states and 6723 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:58,982 INFO L93 Difference]: Finished difference Result 6239 states and 15388 transitions. [2021-02-19 18:30:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:30:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:30:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:58,991 INFO L225 Difference]: With dead ends: 6239 [2021-02-19 18:30:58,991 INFO L226 Difference]: Without dead ends: 5831 [2021-02-19 18:30:58,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:30:58,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2021-02-19 18:30:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 3327. [2021-02-19 18:30:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.4567047504509922) internal successors, (8171), 3326 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8171 transitions. [2021-02-19 18:30:59,055 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8171 transitions. Word has length 53 [2021-02-19 18:30:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:59,055 INFO L480 AbstractCegarLoop]: Abstraction has 3327 states and 8171 transitions. [2021-02-19 18:30:59,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8171 transitions. [2021-02-19 18:30:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:30:59,060 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:59,060 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:59,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:59,274 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash -150843868, now seen corresponding path program 41 times [2021-02-19 18:30:59,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:59,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416105584] [2021-02-19 18:30:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:59,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416105584] [2021-02-19 18:30:59,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150502462] [2021-02-19 18:30:59,547 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 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 [2021-02-19 18:30:59,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:30:59,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:59,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:30:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:00,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:00,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:00,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-02-19 18:31:00,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:00,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:00,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:00,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:3 [2021-02-19 18:31:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:00,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:00,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-02-19 18:31:00,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635816118] [2021-02-19 18:31:00,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:31:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:31:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:31:00,242 INFO L87 Difference]: Start difference. First operand 3327 states and 8171 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:04,451 INFO L93 Difference]: Finished difference Result 9079 states and 21923 transitions. [2021-02-19 18:31:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:31:04,452 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:31:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:04,465 INFO L225 Difference]: With dead ends: 9079 [2021-02-19 18:31:04,465 INFO L226 Difference]: Without dead ends: 8375 [2021-02-19 18:31:04,467 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=631, Invalid=7025, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 18:31:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8375 states. [2021-02-19 18:31:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8375 to 3887. [2021-02-19 18:31:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3887 states, 3886 states have (on average 2.4691199176531136) internal successors, (9595), 3886 states have internal predecessors, (9595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3887 states to 3887 states and 9595 transitions. [2021-02-19 18:31:04,543 INFO L78 Accepts]: Start accepts. Automaton has 3887 states and 9595 transitions. Word has length 53 [2021-02-19 18:31:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:04,543 INFO L480 AbstractCegarLoop]: Abstraction has 3887 states and 9595 transitions. [2021-02-19 18:31:04,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3887 states and 9595 transitions. [2021-02-19 18:31:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:04,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:04,548 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:04,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 18:31:04,749 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1133703204, now seen corresponding path program 42 times [2021-02-19 18:31:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:04,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328145511] [2021-02-19 18:31:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:05,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328145511] [2021-02-19 18:31:05,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775172030] [2021-02-19 18:31:05,036 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 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 [2021-02-19 18:31:05,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:31:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:05,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:05,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:05,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:05,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:05,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:05,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:05,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:05,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:05,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:05,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-02-19 18:31:05,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088402946] [2021-02-19 18:31:05,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:31:05,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:31:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:31:05,658 INFO L87 Difference]: Start difference. First operand 3887 states and 9595 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:06,708 INFO L93 Difference]: Finished difference Result 5527 states and 13691 transitions. [2021-02-19 18:31:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:31:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:31:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:06,716 INFO L225 Difference]: With dead ends: 5527 [2021-02-19 18:31:06,717 INFO L226 Difference]: Without dead ends: 5487 [2021-02-19 18:31:06,717 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:31:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5487 states. [2021-02-19 18:31:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5487 to 3903. [2021-02-19 18:31:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.4692465402357766) internal successors, (9635), 3902 states have internal predecessors, (9635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 9635 transitions. [2021-02-19 18:31:06,777 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 9635 transitions. Word has length 53 [2021-02-19 18:31:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:06,794 INFO L480 AbstractCegarLoop]: Abstraction has 3903 states and 9635 transitions. [2021-02-19 18:31:06,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 9635 transitions. [2021-02-19 18:31:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:06,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:06,798 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:07,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 18:31:07,010 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:07,010 INFO L82 PathProgramCache]: Analyzing trace with hash 222272036, now seen corresponding path program 43 times [2021-02-19 18:31:07,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:07,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30526053] [2021-02-19 18:31:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:07,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30526053] [2021-02-19 18:31:07,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897060956] [2021-02-19 18:31:07,286 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 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 [2021-02-19 18:31:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:07,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:07,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:07,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:07,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:07,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:07,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:07,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:07,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:07,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-02-19 18:31:07,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297685911] [2021-02-19 18:31:07,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:31:07,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:07,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:31:07,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:31:07,857 INFO L87 Difference]: Start difference. First operand 3903 states and 9635 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 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) [2021-02-19 18:31:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:09,036 INFO L93 Difference]: Finished difference Result 7183 states and 17831 transitions. [2021-02-19 18:31:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:31:09,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 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 53 [2021-02-19 18:31:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:09,047 INFO L225 Difference]: With dead ends: 7183 [2021-02-19 18:31:09,047 INFO L226 Difference]: Without dead ends: 7119 [2021-02-19 18:31:09,047 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:31:09,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7119 states. [2021-02-19 18:31:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7119 to 3999. [2021-02-19 18:31:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3998 states have (on average 2.469984992496248) internal successors, (9875), 3998 states have internal predecessors, (9875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 9875 transitions. [2021-02-19 18:31:09,117 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 9875 transitions. Word has length 53 [2021-02-19 18:31:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:09,117 INFO L480 AbstractCegarLoop]: Abstraction has 3999 states and 9875 transitions. [2021-02-19 18:31:09,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 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) [2021-02-19 18:31:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 9875 transitions. [2021-02-19 18:31:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:09,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:09,122 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:09,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 18:31:09,323 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1818591780, now seen corresponding path program 44 times [2021-02-19 18:31:09,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:09,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964330971] [2021-02-19 18:31:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:31:09,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964330971] [2021-02-19 18:31:09,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394796112] [2021-02-19 18:31:09,553 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 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 [2021-02-19 18:31:09,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:31:09,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:09,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:09,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:09,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:10,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:10,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:10,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:10,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:10,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:10,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:10,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:10,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:10,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-02-19 18:31:10,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844953822] [2021-02-19 18:31:10,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:31:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:31:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:31:10,034 INFO L87 Difference]: Start difference. First operand 3999 states and 9875 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-02-19 18:31:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:11,574 INFO L93 Difference]: Finished difference Result 7423 states and 18300 transitions. [2021-02-19 18:31:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:31:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 53 [2021-02-19 18:31:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:11,586 INFO L225 Difference]: With dead ends: 7423 [2021-02-19 18:31:11,586 INFO L226 Difference]: Without dead ends: 6983 [2021-02-19 18:31:11,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:31:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6983 states. [2021-02-19 18:31:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6983 to 4383. [2021-02-19 18:31:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 2.468963943404838) internal successors, (10819), 4382 states have internal predecessors, (10819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 10819 transitions. [2021-02-19 18:31:11,659 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 10819 transitions. Word has length 53 [2021-02-19 18:31:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:11,660 INFO L480 AbstractCegarLoop]: Abstraction has 4383 states and 10819 transitions. [2021-02-19 18:31:11,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-02-19 18:31:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 10819 transitions. [2021-02-19 18:31:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:11,665 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:11,665 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:11,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:11,865 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2114914852, now seen corresponding path program 45 times [2021-02-19 18:31:11,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:11,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546052810] [2021-02-19 18:31:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:31:12,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546052810] [2021-02-19 18:31:12,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842884531] [2021-02-19 18:31:12,113 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 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 [2021-02-19 18:31:12,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:31:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:12,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:12,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:12,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:12,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:12,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:12,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:12,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:12,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 20 [2021-02-19 18:31:12,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249320378] [2021-02-19 18:31:12,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:31:12,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:12,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:31:12,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:31:12,604 INFO L87 Difference]: Start difference. First operand 4383 states and 10819 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-02-19 18:31:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:13,454 INFO L93 Difference]: Finished difference Result 6843 states and 16933 transitions. [2021-02-19 18:31:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:31:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 53 [2021-02-19 18:31:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:13,465 INFO L225 Difference]: With dead ends: 6843 [2021-02-19 18:31:13,465 INFO L226 Difference]: Without dead ends: 6767 [2021-02-19 18:31:13,465 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:31:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2021-02-19 18:31:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 4559. [2021-02-19 18:31:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 2.4684071961386573) internal successors, (11251), 4558 states have internal predecessors, (11251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 11251 transitions. [2021-02-19 18:31:13,538 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 11251 transitions. Word has length 53 [2021-02-19 18:31:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:13,538 INFO L480 AbstractCegarLoop]: Abstraction has 4559 states and 11251 transitions. [2021-02-19 18:31:13,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-02-19 18:31:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 11251 transitions. [2021-02-19 18:31:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:13,543 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:13,543 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:13,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:13,746 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1381485532, now seen corresponding path program 46 times [2021-02-19 18:31:13,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:13,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405356767] [2021-02-19 18:31:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:14,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405356767] [2021-02-19 18:31:14,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456605435] [2021-02-19 18:31:14,017 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 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 [2021-02-19 18:31:14,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:31:14,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:14,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:14,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:14,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:14,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:14,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:14,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:14,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-02-19 18:31:14,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033392234] [2021-02-19 18:31:14,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:31:14,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:14,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:31:14,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:31:14,542 INFO L87 Difference]: Start difference. First operand 4559 states and 11251 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:15,683 INFO L93 Difference]: Finished difference Result 9219 states and 22836 transitions. [2021-02-19 18:31:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:31:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:31:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:15,699 INFO L225 Difference]: With dead ends: 9219 [2021-02-19 18:31:15,699 INFO L226 Difference]: Without dead ends: 8919 [2021-02-19 18:31:15,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:31:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8919 states. [2021-02-19 18:31:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8919 to 5439. [2021-02-19 18:31:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5438 states have (on average 2.4731518940787054) internal successors, (13449), 5438 states have internal predecessors, (13449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 13449 transitions. [2021-02-19 18:31:15,797 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 13449 transitions. Word has length 53 [2021-02-19 18:31:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:15,798 INFO L480 AbstractCegarLoop]: Abstraction has 5439 states and 13449 transitions. [2021-02-19 18:31:15,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 13449 transitions. [2021-02-19 18:31:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:15,804 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:15,804 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:16,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 18:31:16,026 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:16,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1628586972, now seen corresponding path program 47 times [2021-02-19 18:31:16,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:16,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662303392] [2021-02-19 18:31:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:16,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662303392] [2021-02-19 18:31:16,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266119704] [2021-02-19 18:31:16,325 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 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 [2021-02-19 18:31:16,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:31:16,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:17,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:17,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:17,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-02-19 18:31:17,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:17,451 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-02-19 18:31:17,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:17,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:124, output treesize:7 [2021-02-19 18:31:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:17,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:17,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-02-19 18:31:17,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462921006] [2021-02-19 18:31:17,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:31:17,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:31:17,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:31:17,482 INFO L87 Difference]: Start difference. First operand 5439 states and 13449 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:26,834 INFO L93 Difference]: Finished difference Result 9647 states and 23839 transitions. [2021-02-19 18:31:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:31:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 18:31:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:26,848 INFO L225 Difference]: With dead ends: 9647 [2021-02-19 18:31:26,848 INFO L226 Difference]: Without dead ends: 9183 [2021-02-19 18:31:26,849 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=308, Invalid=2448, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:31:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2021-02-19 18:31:26,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 5807. [2021-02-19 18:31:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 2.474853599724423) internal successors, (14369), 5806 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 14369 transitions. [2021-02-19 18:31:26,938 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 14369 transitions. Word has length 53 [2021-02-19 18:31:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:26,939 INFO L480 AbstractCegarLoop]: Abstraction has 5807 states and 14369 transitions. [2021-02-19 18:31:26,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 14369 transitions. [2021-02-19 18:31:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:26,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:26,945 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:27,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:27,145 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1537138212, now seen corresponding path program 48 times [2021-02-19 18:31:27,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:27,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407025776] [2021-02-19 18:31:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:27,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407025776] [2021-02-19 18:31:27,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65026795] [2021-02-19 18:31:27,426 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:27,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:31:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:31:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:27,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:27,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 43 [2021-02-19 18:31:27,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:27,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:27,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:27,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:123, output treesize:7 [2021-02-19 18:31:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:27,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:27,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 20 [2021-02-19 18:31:27,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720520729] [2021-02-19 18:31:27,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:31:27,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:31:27,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:31:27,902 INFO L87 Difference]: Start difference. First operand 5807 states and 14369 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-02-19 18:31:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:28,944 INFO L93 Difference]: Finished difference Result 9315 states and 23042 transitions. [2021-02-19 18:31:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:31:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 53 [2021-02-19 18:31:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:28,959 INFO L225 Difference]: With dead ends: 9315 [2021-02-19 18:31:28,959 INFO L226 Difference]: Without dead ends: 9047 [2021-02-19 18:31:28,959 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:31:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-02-19 18:31:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 6319. [2021-02-19 18:31:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6319 states, 6318 states have (on average 2.476891421335866) internal successors, (15649), 6318 states have internal predecessors, (15649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6319 states to 6319 states and 15649 transitions. [2021-02-19 18:31:29,067 INFO L78 Accepts]: Start accepts. Automaton has 6319 states and 15649 transitions. Word has length 53 [2021-02-19 18:31:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:29,067 INFO L480 AbstractCegarLoop]: Abstraction has 6319 states and 15649 transitions. [2021-02-19 18:31:29,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-02-19 18:31:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6319 states and 15649 transitions. [2021-02-19 18:31:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:29,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:29,074 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:29,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 18:31:29,275 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:29,275 INFO L82 PathProgramCache]: Analyzing trace with hash -469589468, now seen corresponding path program 49 times [2021-02-19 18:31:29,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:29,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435235938] [2021-02-19 18:31:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:29,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435235938] [2021-02-19 18:31:29,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746848245] [2021-02-19 18:31:29,568 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:30,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:30,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:30,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:30,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:30,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:30,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:30,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-02-19 18:31:30,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47659088] [2021-02-19 18:31:30,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:31:30,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:30,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:31:30,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:31:30,073 INFO L87 Difference]: Start difference. First operand 6319 states and 15649 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-02-19 18:31:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:30,999 INFO L93 Difference]: Finished difference Result 11007 states and 27374 transitions. [2021-02-19 18:31:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:31:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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 53 [2021-02-19 18:31:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:31,012 INFO L225 Difference]: With dead ends: 11007 [2021-02-19 18:31:31,012 INFO L226 Difference]: Without dead ends: 10919 [2021-02-19 18:31:31,012 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:31:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10919 states. [2021-02-19 18:31:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10919 to 6127. [2021-02-19 18:31:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6127 states, 6126 states have (on average 2.4761671563826315) internal successors, (15169), 6126 states have internal predecessors, (15169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6127 states to 6127 states and 15169 transitions. [2021-02-19 18:31:31,102 INFO L78 Accepts]: Start accepts. Automaton has 6127 states and 15169 transitions. Word has length 53 [2021-02-19 18:31:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:31,102 INFO L480 AbstractCegarLoop]: Abstraction has 6127 states and 15169 transitions. [2021-02-19 18:31:31,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-02-19 18:31:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6127 states and 15169 transitions. [2021-02-19 18:31:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:31,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:31,107 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:31,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-02-19 18:31:31,308 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1290036772, now seen corresponding path program 50 times [2021-02-19 18:31:31,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:31,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25794410] [2021-02-19 18:31:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:31,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25794410] [2021-02-19 18:31:31,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863852854] [2021-02-19 18:31:31,572 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:31,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:31:31,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:32,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:32,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:32,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:32,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:32,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:32,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:32,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-02-19 18:31:32,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328263762] [2021-02-19 18:31:32,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:31:32,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:32,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:31:32,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:31:32,163 INFO L87 Difference]: Start difference. First operand 6127 states and 15169 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-02-19 18:31:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:33,420 INFO L93 Difference]: Finished difference Result 9895 states and 24617 transitions. [2021-02-19 18:31:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:31:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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 53 [2021-02-19 18:31:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:33,435 INFO L225 Difference]: With dead ends: 9895 [2021-02-19 18:31:33,435 INFO L226 Difference]: Without dead ends: 9807 [2021-02-19 18:31:33,436 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:31:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9807 states. [2021-02-19 18:31:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9807 to 6127. [2021-02-19 18:31:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6127 states, 6126 states have (on average 2.4761671563826315) internal successors, (15169), 6126 states have internal predecessors, (15169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6127 states to 6127 states and 15169 transitions. [2021-02-19 18:31:33,547 INFO L78 Accepts]: Start accepts. Automaton has 6127 states and 15169 transitions. Word has length 53 [2021-02-19 18:31:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:33,548 INFO L480 AbstractCegarLoop]: Abstraction has 6127 states and 15169 transitions. [2021-02-19 18:31:33,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-02-19 18:31:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6127 states and 15169 transitions. [2021-02-19 18:31:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 18:31:33,554 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:33,554 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:33,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 18:31:33,766 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1210808284, now seen corresponding path program 51 times [2021-02-19 18:31:33,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:33,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718564059] [2021-02-19 18:31:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:34,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718564059] [2021-02-19 18:31:34,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66608207] [2021-02-19 18:31:34,109 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:34,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:31:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:31:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:34,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:34,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:34,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-02-19 18:31:34,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:34,897 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:31:34,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:34,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:123, output treesize:7 [2021-02-19 18:31:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:34,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:34,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-02-19 18:31:34,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723131627] [2021-02-19 18:31:34,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:31:34,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:34,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:31:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:31:34,925 INFO L87 Difference]: Start difference. First operand 6127 states and 15169 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 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) [2021-02-19 18:31:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:37,684 INFO L93 Difference]: Finished difference Result 9371 states and 23128 transitions. [2021-02-19 18:31:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:31:37,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 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 53 [2021-02-19 18:31:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:37,699 INFO L225 Difference]: With dead ends: 9371 [2021-02-19 18:31:37,699 INFO L226 Difference]: Without dead ends: 8983 [2021-02-19 18:31:37,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:31:37,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8983 states. [2021-02-19 18:31:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8983 to 6367. [2021-02-19 18:31:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 2.4754948162111217) internal successors, (15759), 6366 states have internal predecessors, (15759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 15759 transitions. [2021-02-19 18:31:37,810 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 15759 transitions. Word has length 53 [2021-02-19 18:31:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:37,810 INFO L480 AbstractCegarLoop]: Abstraction has 6367 states and 15759 transitions. [2021-02-19 18:31:37,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 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) [2021-02-19 18:31:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 15759 transitions. [2021-02-19 18:31:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-19 18:31:37,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:37,817 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:38,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 18:31:38,036 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1089259008, now seen corresponding path program 52 times [2021-02-19 18:31:38,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:38,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049962843] [2021-02-19 18:31:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:31:38,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049962843] [2021-02-19 18:31:38,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849208628] [2021-02-19 18:31:38,337 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:38,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:31:38,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:31:38,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:38,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:38,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:38,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 18:31:38,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:38,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:38,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:38,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 18:31:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:31:38,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:38,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 22 [2021-02-19 18:31:38,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601929023] [2021-02-19 18:31:38,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:31:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:38,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:31:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:31:38,933 INFO L87 Difference]: Start difference. First operand 6367 states and 15759 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:41,131 INFO L93 Difference]: Finished difference Result 10299 states and 25592 transitions. [2021-02-19 18:31:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:31:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-02-19 18:31:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:41,149 INFO L225 Difference]: With dead ends: 10299 [2021-02-19 18:31:41,149 INFO L226 Difference]: Without dead ends: 10215 [2021-02-19 18:31:41,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:31:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10215 states. [2021-02-19 18:31:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10215 to 6287. [2021-02-19 18:31:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 6286 states have (on average 2.475182946229717) internal successors, (15559), 6286 states have internal predecessors, (15559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 15559 transitions. [2021-02-19 18:31:41,269 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 15559 transitions. Word has length 57 [2021-02-19 18:31:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:41,269 INFO L480 AbstractCegarLoop]: Abstraction has 6287 states and 15559 transitions. [2021-02-19 18:31:41,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 15559 transitions. [2021-02-19 18:31:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:31:41,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:41,277 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:41,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:41,477 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1376984770, now seen corresponding path program 53 times [2021-02-19 18:31:41,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:41,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952579685] [2021-02-19 18:31:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:31:41,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952579685] [2021-02-19 18:31:41,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284323994] [2021-02-19 18:31:41,806 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:41,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 18:31:41,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:41,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 18:31:41,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:42,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:42,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:42,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:42,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:42,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:42,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 38 [2021-02-19 18:31:42,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:42,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:42,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:42,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:100, output treesize:3 [2021-02-19 18:31:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:42,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:42,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 18:31:42,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112150361] [2021-02-19 18:31:42,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:31:42,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:42,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:31:42,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:31:42,824 INFO L87 Difference]: Start difference. First operand 6287 states and 15559 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:44,747 INFO L93 Difference]: Finished difference Result 11495 states and 28559 transitions. [2021-02-19 18:31:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:31:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:31:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:44,765 INFO L225 Difference]: With dead ends: 11495 [2021-02-19 18:31:44,766 INFO L226 Difference]: Without dead ends: 11455 [2021-02-19 18:31:44,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=2782, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:31:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11455 states. [2021-02-19 18:31:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11455 to 6287. [2021-02-19 18:31:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 6286 states have (on average 2.475182946229717) internal successors, (15559), 6286 states have internal predecessors, (15559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 15559 transitions. [2021-02-19 18:31:44,907 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 15559 transitions. Word has length 59 [2021-02-19 18:31:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:44,907 INFO L480 AbstractCegarLoop]: Abstraction has 6287 states and 15559 transitions. [2021-02-19 18:31:44,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 15559 transitions. [2021-02-19 18:31:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:31:44,915 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:44,915 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:45,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 18:31:45,134 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1048395582, now seen corresponding path program 54 times [2021-02-19 18:31:45,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:45,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015739737] [2021-02-19 18:31:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:31:45,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015739737] [2021-02-19 18:31:45,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827474044] [2021-02-19 18:31:45,478 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:45,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:31:45,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:45,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 18:31:45,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:46,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:46,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 18:31:46,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:46,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:46,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:46,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 18:31:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:46,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:46,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-02-19 18:31:46,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244618170] [2021-02-19 18:31:46,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:31:46,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:46,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:31:46,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:31:46,471 INFO L87 Difference]: Start difference. First operand 6287 states and 15559 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:48,629 INFO L93 Difference]: Finished difference Result 11479 states and 28559 transitions. [2021-02-19 18:31:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:31:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:31:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:48,648 INFO L225 Difference]: With dead ends: 11479 [2021-02-19 18:31:48,648 INFO L226 Difference]: Without dead ends: 11391 [2021-02-19 18:31:48,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:31:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-02-19 18:31:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 6351. [2021-02-19 18:31:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6351 states, 6350 states have (on average 2.4729133858267716) internal successors, (15703), 6350 states have internal predecessors, (15703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6351 states to 6351 states and 15703 transitions. [2021-02-19 18:31:48,772 INFO L78 Accepts]: Start accepts. Automaton has 6351 states and 15703 transitions. Word has length 59 [2021-02-19 18:31:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:48,772 INFO L480 AbstractCegarLoop]: Abstraction has 6351 states and 15703 transitions. [2021-02-19 18:31:48,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 6351 states and 15703 transitions. [2021-02-19 18:31:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:31:48,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:48,780 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:48,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:48,980 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:48,980 INFO L82 PathProgramCache]: Analyzing trace with hash 809560770, now seen corresponding path program 55 times [2021-02-19 18:31:48,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:48,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300972758] [2021-02-19 18:31:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:31:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300972758] [2021-02-19 18:31:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800755100] [2021-02-19 18:31:49,329 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:31:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:50,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:50,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:31:50,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:50,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:50,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:50,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:31:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:50,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:50,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-02-19 18:31:50,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445739318] [2021-02-19 18:31:50,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:31:50,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:31:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:31:50,368 INFO L87 Difference]: Start difference. First operand 6351 states and 15703 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:52,260 INFO L93 Difference]: Finished difference Result 10359 states and 25711 transitions. [2021-02-19 18:31:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:31:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:31:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:52,274 INFO L225 Difference]: With dead ends: 10359 [2021-02-19 18:31:52,275 INFO L226 Difference]: Without dead ends: 10319 [2021-02-19 18:31:52,275 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:31:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10319 states. [2021-02-19 18:31:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10319 to 6367. [2021-02-19 18:31:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 2.472981464027647) internal successors, (15743), 6366 states have internal predecessors, (15743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 15743 transitions. [2021-02-19 18:31:52,381 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 15743 transitions. Word has length 59 [2021-02-19 18:31:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:52,381 INFO L480 AbstractCegarLoop]: Abstraction has 6367 states and 15743 transitions. [2021-02-19 18:31:52,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 15743 transitions. [2021-02-19 18:31:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:31:52,388 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:52,388 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:52,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-02-19 18:31:52,589 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1895886018, now seen corresponding path program 56 times [2021-02-19 18:31:52,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:52,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389169881] [2021-02-19 18:31:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:52,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389169881] [2021-02-19 18:31:52,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915221039] [2021-02-19 18:31:52,938 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:52,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:31:52,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:31:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:53,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:53,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:53,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:53,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:31:53,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:53,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:53,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:53,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:31:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:53,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:53,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-02-19 18:31:53,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081470375] [2021-02-19 18:31:53,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:31:53,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:31:53,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:31:53,844 INFO L87 Difference]: Start difference. First operand 6367 states and 15743 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:55,765 INFO L93 Difference]: Finished difference Result 9399 states and 23181 transitions. [2021-02-19 18:31:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:31:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:31:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:55,778 INFO L225 Difference]: With dead ends: 9399 [2021-02-19 18:31:55,779 INFO L226 Difference]: Without dead ends: 8991 [2021-02-19 18:31:55,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=301, Invalid=2351, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:31:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8991 states. [2021-02-19 18:31:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8991 to 6655. [2021-02-19 18:31:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6655 states, 6654 states have (on average 2.4705440336639617) internal successors, (16439), 6654 states have internal predecessors, (16439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 16439 transitions. [2021-02-19 18:31:55,885 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 16439 transitions. Word has length 59 [2021-02-19 18:31:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:55,885 INFO L480 AbstractCegarLoop]: Abstraction has 6655 states and 16439 transitions. [2021-02-19 18:31:55,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 16439 transitions. [2021-02-19 18:31:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:31:55,892 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:55,892 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:56,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:56,092 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash 818571970, now seen corresponding path program 57 times [2021-02-19 18:31:56,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:56,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315283249] [2021-02-19 18:31:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315283249] [2021-02-19 18:31:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808055791] [2021-02-19 18:31:56,501 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:56,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:31:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 18:31:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:57,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:57,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:57,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:31:57,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:31:57,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:31:57,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:57,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:57,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:57,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:31:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:57,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:57,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-02-19 18:31:57,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835978816] [2021-02-19 18:31:57,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:31:57,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:31:57,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:31:57,527 INFO L87 Difference]: Start difference. First operand 6655 states and 16439 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:00,244 INFO L93 Difference]: Finished difference Result 13247 states and 32889 transitions. [2021-02-19 18:32:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:32:00,245 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:00,263 INFO L225 Difference]: With dead ends: 13247 [2021-02-19 18:32:00,264 INFO L226 Difference]: Without dead ends: 12831 [2021-02-19 18:32:00,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:32:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2021-02-19 18:32:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 6463. [2021-02-19 18:32:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6463 states, 6462 states have (on average 2.4783348808418446) internal successors, (16015), 6462 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 16015 transitions. [2021-02-19 18:32:00,391 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 16015 transitions. Word has length 59 [2021-02-19 18:32:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:00,391 INFO L480 AbstractCegarLoop]: Abstraction has 6463 states and 16015 transitions. [2021-02-19 18:32:00,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 16015 transitions. [2021-02-19 18:32:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:00,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:00,397 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:00,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 18:32:00,598 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1618438974, now seen corresponding path program 58 times [2021-02-19 18:32:00,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:00,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863554300] [2021-02-19 18:32:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:01,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863554300] [2021-02-19 18:32:01,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547963747] [2021-02-19 18:32:01,015 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:01,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:32:01,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:01,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:02,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:02,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:02,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:02,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:02,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:02,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-02-19 18:32:02,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983882212] [2021-02-19 18:32:02,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:32:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:32:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:32:02,049 INFO L87 Difference]: Start difference. First operand 6463 states and 16015 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:04,173 INFO L93 Difference]: Finished difference Result 12039 states and 29911 transitions. [2021-02-19 18:32:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:32:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:04,212 INFO L225 Difference]: With dead ends: 12039 [2021-02-19 18:32:04,213 INFO L226 Difference]: Without dead ends: 11999 [2021-02-19 18:32:04,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:32:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11999 states. [2021-02-19 18:32:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11999 to 6863. [2021-02-19 18:32:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.4784319440396385) internal successors, (17007), 6862 states have internal predecessors, (17007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 17007 transitions. [2021-02-19 18:32:04,331 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 17007 transitions. Word has length 59 [2021-02-19 18:32:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:04,331 INFO L480 AbstractCegarLoop]: Abstraction has 6863 states and 17007 transitions. [2021-02-19 18:32:04,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 17007 transitions. [2021-02-19 18:32:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:04,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:04,340 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:04,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:04,540 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1990871358, now seen corresponding path program 59 times [2021-02-19 18:32:04,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:04,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311898893] [2021-02-19 18:32:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:04,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311898893] [2021-02-19 18:32:04,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241812501] [2021-02-19 18:32:04,950 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:04,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:32:04,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:04,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 18:32:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:05,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:05,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:06,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 18:32:06,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:06,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:06,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:06,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 18:32:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:06,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:06,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-02-19 18:32:06,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934763783] [2021-02-19 18:32:06,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:06,074 INFO L87 Difference]: Start difference. First operand 6863 states and 17007 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:08,538 INFO L93 Difference]: Finished difference Result 12679 states and 31575 transitions. [2021-02-19 18:32:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:32:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:08,560 INFO L225 Difference]: With dead ends: 12679 [2021-02-19 18:32:08,560 INFO L226 Difference]: Without dead ends: 12591 [2021-02-19 18:32:08,561 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:32:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-02-19 18:32:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 6079. [2021-02-19 18:32:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 6078 states have (on average 2.484863441921685) internal successors, (15103), 6078 states have internal predecessors, (15103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 15103 transitions. [2021-02-19 18:32:08,680 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 15103 transitions. Word has length 59 [2021-02-19 18:32:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:08,680 INFO L480 AbstractCegarLoop]: Abstraction has 6079 states and 15103 transitions. [2021-02-19 18:32:08,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 15103 transitions. [2021-02-19 18:32:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:08,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:08,686 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:08,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 18:32:08,902 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1627392830, now seen corresponding path program 60 times [2021-02-19 18:32:08,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:08,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324784851] [2021-02-19 18:32:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324784851] [2021-02-19 18:32:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097559391] [2021-02-19 18:32:09,414 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:09,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:32:09,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:09,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:10,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:10,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:10,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:10,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:10,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:10,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:10,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:10,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:10,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-02-19 18:32:10,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924117004] [2021-02-19 18:32:10,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:10,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:10,404 INFO L87 Difference]: Start difference. First operand 6079 states and 15103 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:12,722 INFO L93 Difference]: Finished difference Result 9191 states and 22785 transitions. [2021-02-19 18:32:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:32:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:12,736 INFO L225 Difference]: With dead ends: 9191 [2021-02-19 18:32:12,736 INFO L226 Difference]: Without dead ends: 8831 [2021-02-19 18:32:12,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:32:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8831 states. [2021-02-19 18:32:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8831 to 6783. [2021-02-19 18:32:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6783 states, 6782 states have (on average 2.4793571217929813) internal successors, (16815), 6782 states have internal predecessors, (16815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6783 states to 6783 states and 16815 transitions. [2021-02-19 18:32:12,856 INFO L78 Accepts]: Start accepts. Automaton has 6783 states and 16815 transitions. Word has length 59 [2021-02-19 18:32:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:12,856 INFO L480 AbstractCegarLoop]: Abstraction has 6783 states and 16815 transitions. [2021-02-19 18:32:12,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6783 states and 16815 transitions. [2021-02-19 18:32:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:12,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:12,863 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:13,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:13,064 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1159053506, now seen corresponding path program 61 times [2021-02-19 18:32:13,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:13,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932293034] [2021-02-19 18:32:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:32:13,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932293034] [2021-02-19 18:32:13,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884312893] [2021-02-19 18:32:13,398 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:14,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:14,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:14,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:14,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:14,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:14,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:14,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:14,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:14,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:14,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:14,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-02-19 18:32:14,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945555104] [2021-02-19 18:32:14,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:32:14,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:32:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:32:14,417 INFO L87 Difference]: Start difference. First operand 6783 states and 16815 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:17,402 INFO L93 Difference]: Finished difference Result 11035 states and 27359 transitions. [2021-02-19 18:32:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:32:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:17,418 INFO L225 Difference]: With dead ends: 11035 [2021-02-19 18:32:17,418 INFO L226 Difference]: Without dead ends: 10591 [2021-02-19 18:32:17,419 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:32:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10591 states. [2021-02-19 18:32:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10591 to 6463. [2021-02-19 18:32:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6463 states, 6462 states have (on average 2.4808108944599194) internal successors, (16031), 6462 states have internal predecessors, (16031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 16031 transitions. [2021-02-19 18:32:17,534 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 16031 transitions. Word has length 59 [2021-02-19 18:32:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:17,535 INFO L480 AbstractCegarLoop]: Abstraction has 6463 states and 16031 transitions. [2021-02-19 18:32:17,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:17,535 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 16031 transitions. [2021-02-19 18:32:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:17,541 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:17,541 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:17,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 18:32:17,742 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:17,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2036316354, now seen corresponding path program 62 times [2021-02-19 18:32:17,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:17,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780712831] [2021-02-19 18:32:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:18,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780712831] [2021-02-19 18:32:18,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022452265] [2021-02-19 18:32:18,175 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:18,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:32:18,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:18,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:18,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:19,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:19,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:19,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:19,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:19,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:19,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:19,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:19,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-02-19 18:32:19,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169719648] [2021-02-19 18:32:19,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:32:19,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:19,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:32:19,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:32:19,268 INFO L87 Difference]: Start difference. First operand 6463 states and 16031 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:21,779 INFO L93 Difference]: Finished difference Result 9639 states and 23847 transitions. [2021-02-19 18:32:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:32:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:21,794 INFO L225 Difference]: With dead ends: 9639 [2021-02-19 18:32:21,795 INFO L226 Difference]: Without dead ends: 9247 [2021-02-19 18:32:21,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=287, Invalid=2365, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:32:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9247 states. [2021-02-19 18:32:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9247 to 6623. [2021-02-19 18:32:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6623 states, 6622 states have (on average 2.4691935971005736) internal successors, (16351), 6622 states have internal predecessors, (16351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 16351 transitions. [2021-02-19 18:32:21,905 INFO L78 Accepts]: Start accepts. Automaton has 6623 states and 16351 transitions. Word has length 59 [2021-02-19 18:32:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:21,905 INFO L480 AbstractCegarLoop]: Abstraction has 6623 states and 16351 transitions. [2021-02-19 18:32:21,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6623 states and 16351 transitions. [2021-02-19 18:32:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:21,936 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:21,936 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:22,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 18:32:22,137 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1478008638, now seen corresponding path program 63 times [2021-02-19 18:32:22,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:22,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737753076] [2021-02-19 18:32:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:22,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737753076] [2021-02-19 18:32:22,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719415269] [2021-02-19 18:32:22,624 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:22,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:32:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:22,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:22,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:23,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:23,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:23,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:23,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:23,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:23,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:23,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:23,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:23,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-02-19 18:32:23,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465693401] [2021-02-19 18:32:23,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:23,848 INFO L87 Difference]: Start difference. First operand 6623 states and 16351 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:26,037 INFO L93 Difference]: Finished difference Result 10407 states and 25983 transitions. [2021-02-19 18:32:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:32:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:26,050 INFO L225 Difference]: With dead ends: 10407 [2021-02-19 18:32:26,050 INFO L226 Difference]: Without dead ends: 10223 [2021-02-19 18:32:26,050 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:32:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10223 states. [2021-02-19 18:32:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10223 to 6799. [2021-02-19 18:32:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 6798 states have (on average 2.4676375404530746) internal successors, (16775), 6798 states have internal predecessors, (16775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 16775 transitions. [2021-02-19 18:32:26,157 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 16775 transitions. Word has length 59 [2021-02-19 18:32:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:26,157 INFO L480 AbstractCegarLoop]: Abstraction has 6799 states and 16775 transitions. [2021-02-19 18:32:26,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 16775 transitions. [2021-02-19 18:32:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:26,163 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:26,163 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:26,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 18:32:26,364 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash -881927486, now seen corresponding path program 64 times [2021-02-19 18:32:26,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:26,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338467848] [2021-02-19 18:32:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:26,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338467848] [2021-02-19 18:32:26,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595137576] [2021-02-19 18:32:26,796 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:26,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:32:26,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:26,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:26,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:27,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:27,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:27,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:27,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:27,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:27,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:27,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:27,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:27,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:27,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:27,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:27,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-02-19 18:32:27,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664529695] [2021-02-19 18:32:27,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:32:27,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:32:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:32:27,850 INFO L87 Difference]: Start difference. First operand 6799 states and 16775 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:29,709 INFO L93 Difference]: Finished difference Result 9895 states and 24473 transitions. [2021-02-19 18:32:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:32:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:29,723 INFO L225 Difference]: With dead ends: 9895 [2021-02-19 18:32:29,723 INFO L226 Difference]: Without dead ends: 9567 [2021-02-19 18:32:29,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:32:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9567 states. [2021-02-19 18:32:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9567 to 7263. [2021-02-19 18:32:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7263 states, 7262 states have (on average 2.4675020655466815) internal successors, (17919), 7262 states have internal predecessors, (17919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7263 states to 7263 states and 17919 transitions. [2021-02-19 18:32:29,836 INFO L78 Accepts]: Start accepts. Automaton has 7263 states and 17919 transitions. Word has length 59 [2021-02-19 18:32:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:29,836 INFO L480 AbstractCegarLoop]: Abstraction has 7263 states and 17919 transitions. [2021-02-19 18:32:29,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7263 states and 17919 transitions. [2021-02-19 18:32:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:29,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:29,844 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:30,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:30,045 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:30,045 INFO L82 PathProgramCache]: Analyzing trace with hash 251113154, now seen corresponding path program 65 times [2021-02-19 18:32:30,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:30,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914350082] [2021-02-19 18:32:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914350082] [2021-02-19 18:32:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877345011] [2021-02-19 18:32:30,484 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:30,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:32:30,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:30,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 18:32:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:31,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:31,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:31,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:31,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:31,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 18:32:31,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:31,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:31,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:31,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 18:32:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:31,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:31,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-02-19 18:32:31,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383292937] [2021-02-19 18:32:31,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:32:31,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:31,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:32:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:32:31,647 INFO L87 Difference]: Start difference. First operand 7263 states and 17919 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:33,888 INFO L93 Difference]: Finished difference Result 13111 states and 32599 transitions. [2021-02-19 18:32:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:32:33,889 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:33,909 INFO L225 Difference]: With dead ends: 13111 [2021-02-19 18:32:33,909 INFO L226 Difference]: Without dead ends: 13023 [2021-02-19 18:32:33,909 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=243, Invalid=2109, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:32:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13023 states. [2021-02-19 18:32:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13023 to 7087. [2021-02-19 18:32:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 2.4666948913350266) internal successors, (17479), 7086 states have internal predecessors, (17479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 17479 transitions. [2021-02-19 18:32:34,040 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 17479 transitions. Word has length 59 [2021-02-19 18:32:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:34,040 INFO L480 AbstractCegarLoop]: Abstraction has 7087 states and 17479 transitions. [2021-02-19 18:32:34,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 17479 transitions. [2021-02-19 18:32:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:34,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:34,048 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:34,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:34,249 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash -101285182, now seen corresponding path program 66 times [2021-02-19 18:32:34,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:34,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385937468] [2021-02-19 18:32:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:34,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385937468] [2021-02-19 18:32:34,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247849649] [2021-02-19 18:32:34,744 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:34,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:32:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:34,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:35,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:35,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:35,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:35,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:35,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:35,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:35,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:35,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:35,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:35,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-02-19 18:32:35,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726487782] [2021-02-19 18:32:35,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:35,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:35,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:35,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:35,960 INFO L87 Difference]: Start difference. First operand 7087 states and 17479 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:38,522 INFO L93 Difference]: Finished difference Result 10759 states and 26703 transitions. [2021-02-19 18:32:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:32:38,523 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:38,537 INFO L225 Difference]: With dead ends: 10759 [2021-02-19 18:32:38,537 INFO L226 Difference]: Without dead ends: 10671 [2021-02-19 18:32:38,537 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:32:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2021-02-19 18:32:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 7167. [2021-02-19 18:32:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 2.4670667038794307) internal successors, (17679), 7166 states have internal predecessors, (17679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 17679 transitions. [2021-02-19 18:32:38,668 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 17679 transitions. Word has length 59 [2021-02-19 18:32:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:38,668 INFO L480 AbstractCegarLoop]: Abstraction has 7167 states and 17679 transitions. [2021-02-19 18:32:38,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 17679 transitions. [2021-02-19 18:32:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:38,676 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:38,676 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:38,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:38,877 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1311626046, now seen corresponding path program 67 times [2021-02-19 18:32:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:38,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896870975] [2021-02-19 18:32:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:39,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896870975] [2021-02-19 18:32:39,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908735251] [2021-02-19 18:32:39,368 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:39,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:40,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:40,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:40,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:40,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:40,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:40,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:40,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:40,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:40,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-02-19 18:32:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655782994] [2021-02-19 18:32:40,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:40,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:40,566 INFO L87 Difference]: Start difference. First operand 7167 states and 17679 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:43,057 INFO L93 Difference]: Finished difference Result 9299 states and 22987 transitions. [2021-02-19 18:32:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:32:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:43,071 INFO L225 Difference]: With dead ends: 9299 [2021-02-19 18:32:43,072 INFO L226 Difference]: Without dead ends: 9263 [2021-02-19 18:32:43,072 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:32:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9263 states. [2021-02-19 18:32:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9263 to 7167. [2021-02-19 18:32:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 2.4670667038794307) internal successors, (17679), 7166 states have internal predecessors, (17679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 17679 transitions. [2021-02-19 18:32:43,185 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 17679 transitions. Word has length 59 [2021-02-19 18:32:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:43,186 INFO L480 AbstractCegarLoop]: Abstraction has 7167 states and 17679 transitions. [2021-02-19 18:32:43,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 17679 transitions. [2021-02-19 18:32:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:43,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:43,194 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:43,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 18:32:43,395 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash -718142782, now seen corresponding path program 68 times [2021-02-19 18:32:43,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:43,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088501170] [2021-02-19 18:32:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088501170] [2021-02-19 18:32:43,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630451253] [2021-02-19 18:32:43,924 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:43,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:32:43,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:43,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:44,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:44,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:45,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:45,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:45,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:45,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:45,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:45,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:45,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:45,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:45,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:45,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-02-19 18:32:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394266626] [2021-02-19 18:32:45,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:32:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:32:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:32:45,092 INFO L87 Difference]: Start difference. First operand 7167 states and 17679 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:48,718 INFO L93 Difference]: Finished difference Result 13959 states and 34855 transitions. [2021-02-19 18:32:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:32:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:48,739 INFO L225 Difference]: With dead ends: 13959 [2021-02-19 18:32:48,739 INFO L226 Difference]: Without dead ends: 13775 [2021-02-19 18:32:48,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=316, Invalid=2876, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:32:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13775 states. [2021-02-19 18:32:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13775 to 3247. [2021-02-19 18:32:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 2.4790511398644486) internal successors, (8047), 3246 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8047 transitions. [2021-02-19 18:32:48,836 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8047 transitions. Word has length 59 [2021-02-19 18:32:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:48,836 INFO L480 AbstractCegarLoop]: Abstraction has 3247 states and 8047 transitions. [2021-02-19 18:32:48,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8047 transitions. [2021-02-19 18:32:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:48,839 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:48,840 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:49,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:49,040 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:49,040 INFO L82 PathProgramCache]: Analyzing trace with hash 658580674, now seen corresponding path program 69 times [2021-02-19 18:32:49,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:49,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210532816] [2021-02-19 18:32:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:49,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210532816] [2021-02-19 18:32:49,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060616916] [2021-02-19 18:32:49,622 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:49,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:32:49,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:50,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:50,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:50,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:50,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:50,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:50,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:50,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:50,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:50,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:50,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-02-19 18:32:50,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750401420] [2021-02-19 18:32:50,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:32:50,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:50,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:32:50,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:32:50,794 INFO L87 Difference]: Start difference. First operand 3247 states and 8047 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:53,181 INFO L93 Difference]: Finished difference Result 7607 states and 19031 transitions. [2021-02-19 18:32:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:32:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:53,190 INFO L225 Difference]: With dead ends: 7607 [2021-02-19 18:32:53,190 INFO L226 Difference]: Without dead ends: 7519 [2021-02-19 18:32:53,190 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=322, Invalid=2870, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:32:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2021-02-19 18:32:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 3103. [2021-02-19 18:32:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 2.478078658929723) internal successors, (7687), 3102 states have internal predecessors, (7687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 7687 transitions. [2021-02-19 18:32:53,235 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 7687 transitions. Word has length 59 [2021-02-19 18:32:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:53,235 INFO L480 AbstractCegarLoop]: Abstraction has 3103 states and 7687 transitions. [2021-02-19 18:32:53,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 7687 transitions. [2021-02-19 18:32:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:53,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:53,237 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:53,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:53,437 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash -551760190, now seen corresponding path program 70 times [2021-02-19 18:32:53,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:53,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488104016] [2021-02-19 18:32:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:53,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488104016] [2021-02-19 18:32:53,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73501308] [2021-02-19 18:32:53,803 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:53,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:32:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:32:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:54,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:54,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:54,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:55,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:55,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:32:55,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:55,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:55,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:55,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:32:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:55,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:55,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-02-19 18:32:55,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225436417] [2021-02-19 18:32:55,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:32:55,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:55,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:32:55,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:32:55,055 INFO L87 Difference]: Start difference. First operand 3103 states and 7687 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:58,110 INFO L93 Difference]: Finished difference Result 5795 states and 14395 transitions. [2021-02-19 18:32:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:32:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:32:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:58,117 INFO L225 Difference]: With dead ends: 5795 [2021-02-19 18:32:58,118 INFO L226 Difference]: Without dead ends: 5711 [2021-02-19 18:32:58,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=328, Invalid=2864, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:32:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-02-19 18:32:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 2863. [2021-02-19 18:32:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.4846261355695316) internal successors, (7111), 2862 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7111 transitions. [2021-02-19 18:32:58,166 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7111 transitions. Word has length 59 [2021-02-19 18:32:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:58,166 INFO L480 AbstractCegarLoop]: Abstraction has 2863 states and 7111 transitions. [2021-02-19 18:32:58,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7111 transitions. [2021-02-19 18:32:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:32:58,169 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:58,169 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:58,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:58,369 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1262573886, now seen corresponding path program 71 times [2021-02-19 18:32:58,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:58,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758462094] [2021-02-19 18:32:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:58,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758462094] [2021-02-19 18:32:58,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474013251] [2021-02-19 18:32:58,928 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:58,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:32:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 61 conjunts are in the unsatisfiable core [2021-02-19 18:32:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:59,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:59,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:32:59,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:00,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:00,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:00,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:00,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:00,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:00,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:00,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 18:33:00,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:00,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:00,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:00,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 18:33:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:00,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:00,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-02-19 18:33:00,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186768637] [2021-02-19 18:33:00,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:33:00,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:00,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:33:00,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:33:00,064 INFO L87 Difference]: Start difference. First operand 2863 states and 7111 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:03,528 INFO L93 Difference]: Finished difference Result 6023 states and 14865 transitions. [2021-02-19 18:33:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:33:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:03,536 INFO L225 Difference]: With dead ends: 6023 [2021-02-19 18:33:03,536 INFO L226 Difference]: Without dead ends: 5567 [2021-02-19 18:33:03,537 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=297, Invalid=2565, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:33:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-02-19 18:33:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 3359. [2021-02-19 18:33:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 2.4797498511018463) internal successors, (8327), 3358 states have internal predecessors, (8327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 8327 transitions. [2021-02-19 18:33:03,590 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 8327 transitions. Word has length 59 [2021-02-19 18:33:03,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:03,590 INFO L480 AbstractCegarLoop]: Abstraction has 3359 states and 8327 transitions. [2021-02-19 18:33:03,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:03,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 8327 transitions. [2021-02-19 18:33:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:03,593 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:03,593 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:03,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 18:33:03,793 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash -481931582, now seen corresponding path program 72 times [2021-02-19 18:33:03,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:03,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633426742] [2021-02-19 18:33:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633426742] [2021-02-19 18:33:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761188589] [2021-02-19 18:33:04,470 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:04,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:33:04,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-02-19 18:33:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:05,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:05,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 48 [2021-02-19 18:33:05,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:06,025 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:33:06,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:06,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:142, output treesize:7 [2021-02-19 18:33:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:06,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:06,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-02-19 18:33:06,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048761596] [2021-02-19 18:33:06,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:33:06,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:33:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:33:06,068 INFO L87 Difference]: Start difference. First operand 3359 states and 8327 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:10,194 INFO L93 Difference]: Finished difference Result 7771 states and 19405 transitions. [2021-02-19 18:33:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:33:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:10,203 INFO L225 Difference]: With dead ends: 7771 [2021-02-19 18:33:10,203 INFO L226 Difference]: Without dead ends: 7599 [2021-02-19 18:33:10,203 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:33:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2021-02-19 18:33:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 3711. [2021-02-19 18:33:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3711 states, 3710 states have (on average 2.4816711590296494) internal successors, (9207), 3710 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 9207 transitions. [2021-02-19 18:33:10,258 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 9207 transitions. Word has length 59 [2021-02-19 18:33:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:10,258 INFO L480 AbstractCegarLoop]: Abstraction has 3711 states and 9207 transitions. [2021-02-19 18:33:10,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 9207 transitions. [2021-02-19 18:33:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:10,261 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:10,261 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:10,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:10,462 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:10,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:10,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1692272446, now seen corresponding path program 73 times [2021-02-19 18:33:10,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:10,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275642635] [2021-02-19 18:33:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:10,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275642635] [2021-02-19 18:33:10,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695524569] [2021-02-19 18:33:10,883 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:10,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:10,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:11,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:11,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:11,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:11,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:11,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:11,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:11,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:11,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-02-19 18:33:11,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791793942] [2021-02-19 18:33:11,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:33:11,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:33:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:33:11,783 INFO L87 Difference]: Start difference. First operand 3711 states and 9207 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:13,257 INFO L93 Difference]: Finished difference Result 5635 states and 13987 transitions. [2021-02-19 18:33:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:33:13,259 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:13,264 INFO L225 Difference]: With dead ends: 5635 [2021-02-19 18:33:13,264 INFO L226 Difference]: Without dead ends: 5599 [2021-02-19 18:33:13,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=247, Invalid=2009, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:33:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-02-19 18:33:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 3711. [2021-02-19 18:33:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3711 states, 3710 states have (on average 2.4816711590296494) internal successors, (9207), 3710 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 9207 transitions. [2021-02-19 18:33:13,303 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 9207 transitions. Word has length 59 [2021-02-19 18:33:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:13,303 INFO L480 AbstractCegarLoop]: Abstraction has 3711 states and 9207 transitions. [2021-02-19 18:33:13,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 9207 transitions. [2021-02-19 18:33:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:13,306 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:13,306 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:13,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 18:33:13,506 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1177459394, now seen corresponding path program 74 times [2021-02-19 18:33:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:13,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530687755] [2021-02-19 18:33:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:13,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530687755] [2021-02-19 18:33:13,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479409928] [2021-02-19 18:33:13,911 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:13,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:33:13,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:14,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:14,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:14,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:14,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:14,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:14,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:14,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:14,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-02-19 18:33:14,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69213010] [2021-02-19 18:33:14,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:33:14,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:14,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:33:14,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:33:14,684 INFO L87 Difference]: Start difference. First operand 3711 states and 9207 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:15,987 INFO L93 Difference]: Finished difference Result 7195 states and 17863 transitions. [2021-02-19 18:33:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:33:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:15,995 INFO L225 Difference]: With dead ends: 7195 [2021-02-19 18:33:15,995 INFO L226 Difference]: Without dead ends: 7135 [2021-02-19 18:33:15,995 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=262, Invalid=2090, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:33:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-02-19 18:33:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 3807. [2021-02-19 18:33:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 2.4821334734629534) internal successors, (9447), 3806 states have internal predecessors, (9447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 9447 transitions. [2021-02-19 18:33:16,045 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 9447 transitions. Word has length 59 [2021-02-19 18:33:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:16,045 INFO L480 AbstractCegarLoop]: Abstraction has 3807 states and 9447 transitions. [2021-02-19 18:33:16,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 9447 transitions. [2021-02-19 18:33:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:16,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:16,048 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:16,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:16,248 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1483019582, now seen corresponding path program 75 times [2021-02-19 18:33:16,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:16,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496392190] [2021-02-19 18:33:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496392190] [2021-02-19 18:33:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127451273] [2021-02-19 18:33:16,608 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:16,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:33:16,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:16,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:16,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:17,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:17,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:17,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:17,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:17,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:17,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:17,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:17,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-02-19 18:33:17,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734052665] [2021-02-19 18:33:17,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:33:17,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:33:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:33:17,258 INFO L87 Difference]: Start difference. First operand 3807 states and 9447 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:19,103 INFO L93 Difference]: Finished difference Result 6451 states and 15879 transitions. [2021-02-19 18:33:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:33:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:19,108 INFO L225 Difference]: With dead ends: 6451 [2021-02-19 18:33:19,108 INFO L226 Difference]: Without dead ends: 6047 [2021-02-19 18:33:19,109 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:33:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2021-02-19 18:33:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 4271. [2021-02-19 18:33:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 2.4733021077283373) internal successors, (10561), 4270 states have internal predecessors, (10561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 10561 transitions. [2021-02-19 18:33:19,146 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 10561 transitions. Word has length 59 [2021-02-19 18:33:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:19,146 INFO L480 AbstractCegarLoop]: Abstraction has 4271 states and 10561 transitions. [2021-02-19 18:33:19,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 10561 transitions. [2021-02-19 18:33:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:19,148 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:19,149 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:19,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:19,354 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1595649730, now seen corresponding path program 76 times [2021-02-19 18:33:19,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:19,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913351617] [2021-02-19 18:33:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913351617] [2021-02-19 18:33:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973895409] [2021-02-19 18:33:19,700 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:19,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:33:19,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:20,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:20,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:20,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:20,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:20,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:20,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-02-19 18:33:20,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797680604] [2021-02-19 18:33:20,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:33:20,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:33:20,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:33:20,373 INFO L87 Difference]: Start difference. First operand 4271 states and 10561 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:22,396 INFO L93 Difference]: Finished difference Result 6791 states and 16703 transitions. [2021-02-19 18:33:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:33:22,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:22,403 INFO L225 Difference]: With dead ends: 6791 [2021-02-19 18:33:22,403 INFO L226 Difference]: Without dead ends: 6351 [2021-02-19 18:33:22,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:33:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-02-19 18:33:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 4207. [2021-02-19 18:33:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 2.4805040418449833) internal successors, (10433), 4206 states have internal predecessors, (10433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10433 transitions. [2021-02-19 18:33:22,450 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10433 transitions. Word has length 59 [2021-02-19 18:33:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:22,450 INFO L480 AbstractCegarLoop]: Abstraction has 4207 states and 10433 transitions. [2021-02-19 18:33:22,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10433 transitions. [2021-02-19 18:33:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:22,452 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:22,453 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:22,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:22,667 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash 546992834, now seen corresponding path program 77 times [2021-02-19 18:33:22,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:22,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70411069] [2021-02-19 18:33:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70411069] [2021-02-19 18:33:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527730561] [2021-02-19 18:33:23,018 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:23,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:33:23,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:23,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 18:33:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:23,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:23,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:23,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:23,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 38 [2021-02-19 18:33:23,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:23,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:23,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:23,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:100, output treesize:3 [2021-02-19 18:33:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:23,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:23,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-02-19 18:33:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465959745] [2021-02-19 18:33:23,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:33:23,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:33:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:33:23,978 INFO L87 Difference]: Start difference. First operand 4207 states and 10433 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:26,885 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 18:33:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:28,402 INFO L93 Difference]: Finished difference Result 9023 states and 22303 transitions. [2021-02-19 18:33:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:33:28,403 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:28,411 INFO L225 Difference]: With dead ends: 9023 [2021-02-19 18:33:28,411 INFO L226 Difference]: Without dead ends: 8575 [2021-02-19 18:33:28,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=434, Invalid=4122, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:33:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-02-19 18:33:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 5775. [2021-02-19 18:33:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 2.469172151021822) internal successors, (14257), 5774 states have internal predecessors, (14257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 14257 transitions. [2021-02-19 18:33:28,476 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 14257 transitions. Word has length 59 [2021-02-19 18:33:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:28,476 INFO L480 AbstractCegarLoop]: Abstraction has 5775 states and 14257 transitions. [2021-02-19 18:33:28,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 14257 transitions. [2021-02-19 18:33:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:28,481 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:28,481 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:28,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:28,681 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash 117294274, now seen corresponding path program 78 times [2021-02-19 18:33:28,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:28,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246782859] [2021-02-19 18:33:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:29,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246782859] [2021-02-19 18:33:29,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288603058] [2021-02-19 18:33:29,159 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:29,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:33:29,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:29,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:29,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:29,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:29,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:29,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:29,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:29,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:29,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:30,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:30,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-02-19 18:33:30,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042803498] [2021-02-19 18:33:30,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:33:30,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:33:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:33:30,030 INFO L87 Difference]: Start difference. First operand 5775 states and 14257 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:31,503 INFO L93 Difference]: Finished difference Result 10131 states and 25157 transitions. [2021-02-19 18:33:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:33:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:31,513 INFO L225 Difference]: With dead ends: 10131 [2021-02-19 18:33:31,513 INFO L226 Difference]: Without dead ends: 9903 [2021-02-19 18:33:31,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:33:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9903 states. [2021-02-19 18:33:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9903 to 5855. [2021-02-19 18:33:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5855 states, 5854 states have (on average 2.4695934403826443) internal successors, (14457), 5854 states have internal predecessors, (14457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5855 states to 5855 states and 14457 transitions. [2021-02-19 18:33:31,583 INFO L78 Accepts]: Start accepts. Automaton has 5855 states and 14457 transitions. Word has length 59 [2021-02-19 18:33:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:31,583 INFO L480 AbstractCegarLoop]: Abstraction has 5855 states and 14457 transitions. [2021-02-19 18:33:31,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5855 states and 14457 transitions. [2021-02-19 18:33:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:31,587 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:31,587 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:31,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:31,788 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash 728306882, now seen corresponding path program 79 times [2021-02-19 18:33:31,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:31,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447651458] [2021-02-19 18:33:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:32,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447651458] [2021-02-19 18:33:32,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010204177] [2021-02-19 18:33:32,193 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:32,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:32,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:32,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:32,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:32,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:32,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:32,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:32,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 23 [2021-02-19 18:33:32,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702032055] [2021-02-19 18:33:32,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:33:32,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:32,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:33:32,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:33:32,903 INFO L87 Difference]: Start difference. First operand 5855 states and 14457 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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) [2021-02-19 18:33:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:35,163 INFO L93 Difference]: Finished difference Result 8583 states and 21099 transitions. [2021-02-19 18:33:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:33:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 59 [2021-02-19 18:33:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:35,170 INFO L225 Difference]: With dead ends: 8583 [2021-02-19 18:33:35,170 INFO L226 Difference]: Without dead ends: 8143 [2021-02-19 18:33:35,170 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:33:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2021-02-19 18:33:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 6527. [2021-02-19 18:33:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 2.4681274900398407) internal successors, (16107), 6526 states have internal predecessors, (16107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 16107 transitions. [2021-02-19 18:33:35,233 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 16107 transitions. Word has length 59 [2021-02-19 18:33:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:35,233 INFO L480 AbstractCegarLoop]: Abstraction has 6527 states and 16107 transitions. [2021-02-19 18:33:35,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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) [2021-02-19 18:33:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 16107 transitions. [2021-02-19 18:33:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:35,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:35,237 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:35,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:35,438 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:35,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1720630978, now seen corresponding path program 80 times [2021-02-19 18:33:35,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:35,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010429740] [2021-02-19 18:33:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:35,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010429740] [2021-02-19 18:33:35,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599957015] [2021-02-19 18:33:35,854 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:33:35,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:33:35,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:36,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:36,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:36,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:36,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:36,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:36,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:36,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:36,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 23 [2021-02-19 18:33:36,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226890543] [2021-02-19 18:33:36,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:33:36,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:33:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:33:36,573 INFO L87 Difference]: Start difference. First operand 6527 states and 16107 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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) [2021-02-19 18:33:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:37,969 INFO L93 Difference]: Finished difference Result 9779 states and 24207 transitions. [2021-02-19 18:33:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:33:37,970 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 59 [2021-02-19 18:33:37,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:37,978 INFO L225 Difference]: With dead ends: 9779 [2021-02-19 18:33:37,978 INFO L226 Difference]: Without dead ends: 9695 [2021-02-19 18:33:37,979 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:33:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9695 states. [2021-02-19 18:33:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9695 to 6447. [2021-02-19 18:33:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6447 states, 6446 states have (on average 2.4677319267762954) internal successors, (15907), 6446 states have internal predecessors, (15907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6447 states to 6447 states and 15907 transitions. [2021-02-19 18:33:38,049 INFO L78 Accepts]: Start accepts. Automaton has 6447 states and 15907 transitions. Word has length 59 [2021-02-19 18:33:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:38,049 INFO L480 AbstractCegarLoop]: Abstraction has 6447 states and 15907 transitions. [2021-02-19 18:33:38,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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) [2021-02-19 18:33:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 6447 states and 15907 transitions. [2021-02-19 18:33:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:38,053 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:38,053 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:38,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:38,254 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash -349007166, now seen corresponding path program 81 times [2021-02-19 18:33:38,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:38,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992473161] [2021-02-19 18:33:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:38,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992473161] [2021-02-19 18:33:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391079773] [2021-02-19 18:33:38,654 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:38,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:33:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:39,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:39,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:39,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:39,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:39,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:39,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:39,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 24 [2021-02-19 18:33:39,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140309516] [2021-02-19 18:33:39,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:33:39,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:33:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:33:39,404 INFO L87 Difference]: Start difference. First operand 6447 states and 15907 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 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) [2021-02-19 18:33:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:41,397 INFO L93 Difference]: Finished difference Result 12147 states and 30111 transitions. [2021-02-19 18:33:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:33:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 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 59 [2021-02-19 18:33:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:41,409 INFO L225 Difference]: With dead ends: 12147 [2021-02-19 18:33:41,409 INFO L226 Difference]: Without dead ends: 12063 [2021-02-19 18:33:41,409 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:33:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12063 states. [2021-02-19 18:33:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12063 to 6703. [2021-02-19 18:33:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 2.4689644882124737) internal successors, (16547), 6702 states have internal predecessors, (16547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 16547 transitions. [2021-02-19 18:33:41,493 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 16547 transitions. Word has length 59 [2021-02-19 18:33:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:41,493 INFO L480 AbstractCegarLoop]: Abstraction has 6703 states and 16547 transitions. [2021-02-19 18:33:41,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 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) [2021-02-19 18:33:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 16547 transitions. [2021-02-19 18:33:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:41,497 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:41,497 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:41,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 18:33:41,698 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:41,698 INFO L82 PathProgramCache]: Analyzing trace with hash 298608322, now seen corresponding path program 82 times [2021-02-19 18:33:41,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:41,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333918838] [2021-02-19 18:33:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333918838] [2021-02-19 18:33:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760476594] [2021-02-19 18:33:42,176 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:42,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:33:42,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:42,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:42,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:42,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:42,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:42,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:42,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:42,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2021-02-19 18:33:42,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027773069] [2021-02-19 18:33:42,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:33:42,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:42,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:33:42,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:33:42,966 INFO L87 Difference]: Start difference. First operand 6703 states and 16547 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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) [2021-02-19 18:33:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:45,115 INFO L93 Difference]: Finished difference Result 10819 states and 26799 transitions. [2021-02-19 18:33:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:33:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 59 [2021-02-19 18:33:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:45,126 INFO L225 Difference]: With dead ends: 10819 [2021-02-19 18:33:45,126 INFO L226 Difference]: Without dead ends: 10735 [2021-02-19 18:33:45,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:33:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-02-19 18:33:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 6735. [2021-02-19 18:33:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6735 states, 6734 states have (on average 2.469111969111969) internal successors, (16627), 6734 states have internal predecessors, (16627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6735 states to 6735 states and 16627 transitions. [2021-02-19 18:33:45,206 INFO L78 Accepts]: Start accepts. Automaton has 6735 states and 16627 transitions. Word has length 59 [2021-02-19 18:33:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:45,206 INFO L480 AbstractCegarLoop]: Abstraction has 6735 states and 16627 transitions. [2021-02-19 18:33:45,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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) [2021-02-19 18:33:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 6735 states and 16627 transitions. [2021-02-19 18:33:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 18:33:45,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:45,210 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:45,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:45,411 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1097175234, now seen corresponding path program 83 times [2021-02-19 18:33:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:45,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202559521] [2021-02-19 18:33:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:45,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202559521] [2021-02-19 18:33:45,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593825345] [2021-02-19 18:33:45,899 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:45,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:33:45,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:45,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:45,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:46,509 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-02-19 18:33:46,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:46,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:46,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:46,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:46,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:126, output treesize:7 [2021-02-19 18:33:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:46,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:46,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2021-02-19 18:33:46,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406046599] [2021-02-19 18:33:46,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:33:46,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:46,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:33:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:33:46,559 INFO L87 Difference]: Start difference. First operand 6735 states and 16627 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:48,282 INFO L93 Difference]: Finished difference Result 10067 states and 24919 transitions. [2021-02-19 18:33:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:33:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 18:33:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:48,293 INFO L225 Difference]: With dead ends: 10067 [2021-02-19 18:33:48,293 INFO L226 Difference]: Without dead ends: 10031 [2021-02-19 18:33:48,293 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:33:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10031 states. [2021-02-19 18:33:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10031 to 6767. [2021-02-19 18:33:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 2.469258054980786) internal successors, (16707), 6766 states have internal predecessors, (16707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 16707 transitions. [2021-02-19 18:33:48,368 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 16707 transitions. Word has length 59 [2021-02-19 18:33:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:48,368 INFO L480 AbstractCegarLoop]: Abstraction has 6767 states and 16707 transitions. [2021-02-19 18:33:48,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 16707 transitions. [2021-02-19 18:33:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-19 18:33:48,373 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:48,373 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:48,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-02-19 18:33:48,573 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash 28765444, now seen corresponding path program 84 times [2021-02-19 18:33:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:48,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327294337] [2021-02-19 18:33:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 52 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:33:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327294337] [2021-02-19 18:33:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430675584] [2021-02-19 18:33:48,665 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:48,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:33:48,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 18:33:48,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:33:48,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:48,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 18:33:48,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196257494] [2021-02-19 18:33:48,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:33:48,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:33:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:33:48,857 INFO L87 Difference]: Start difference. First operand 6767 states and 16707 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 9 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) [2021-02-19 18:33:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:48,920 INFO L93 Difference]: Finished difference Result 8363 states and 20552 transitions. [2021-02-19 18:33:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:33:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 9 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 61 [2021-02-19 18:33:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:48,928 INFO L225 Difference]: With dead ends: 8363 [2021-02-19 18:33:48,929 INFO L226 Difference]: Without dead ends: 8355 [2021-02-19 18:33:48,929 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:33:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8355 states. [2021-02-19 18:33:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8355 to 7087. [2021-02-19 18:33:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 2.472904318374259) internal successors, (17523), 7086 states have internal predecessors, (17523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 17523 transitions. [2021-02-19 18:33:48,998 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 17523 transitions. Word has length 61 [2021-02-19 18:33:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:48,998 INFO L480 AbstractCegarLoop]: Abstraction has 7087 states and 17523 transitions. [2021-02-19 18:33:48,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 9 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) [2021-02-19 18:33:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 17523 transitions. [2021-02-19 18:33:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-19 18:33:49,002 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:49,003 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:49,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:49,203 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:49,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:49,203 INFO L82 PathProgramCache]: Analyzing trace with hash -100577020, now seen corresponding path program 85 times [2021-02-19 18:33:49,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:49,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552863363] [2021-02-19 18:33:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552863363] [2021-02-19 18:33:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097835064] [2021-02-19 18:33:49,286 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:49,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 18:33:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:33:49,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:49,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 18:33:49,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587121522] [2021-02-19 18:33:49,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:33:49,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:33:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:33:49,484 INFO L87 Difference]: Start difference. First operand 7087 states and 17523 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:49,555 INFO L93 Difference]: Finished difference Result 9039 states and 22243 transitions. [2021-02-19 18:33:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:33:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-02-19 18:33:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:49,565 INFO L225 Difference]: With dead ends: 9039 [2021-02-19 18:33:49,565 INFO L226 Difference]: Without dead ends: 9031 [2021-02-19 18:33:49,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:33:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9031 states. [2021-02-19 18:33:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9031 to 7359. [2021-02-19 18:33:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7359 states, 7358 states have (on average 2.476080456645828) internal successors, (18219), 7358 states have internal predecessors, (18219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7359 states to 7359 states and 18219 transitions. [2021-02-19 18:33:49,639 INFO L78 Accepts]: Start accepts. Automaton has 7359 states and 18219 transitions. Word has length 61 [2021-02-19 18:33:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:49,639 INFO L480 AbstractCegarLoop]: Abstraction has 7359 states and 18219 transitions. [2021-02-19 18:33:49,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7359 states and 18219 transitions. [2021-02-19 18:33:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-19 18:33:49,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:49,645 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:49,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:49,845 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash -449433154, now seen corresponding path program 86 times [2021-02-19 18:33:49,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:49,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366671101] [2021-02-19 18:33:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:33:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366671101] [2021-02-19 18:33:50,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342712442] [2021-02-19 18:33:50,264 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:50,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:33:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:50,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 18:33:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:51,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:51,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 18:33:51,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:51,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:51,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:51,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 18:33:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:33:51,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:51,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 25 [2021-02-19 18:33:51,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13083114] [2021-02-19 18:33:51,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:33:51,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:33:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:33:51,170 INFO L87 Difference]: Start difference. First operand 7359 states and 18219 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:55,027 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-02-19 18:33:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:55,175 INFO L93 Difference]: Finished difference Result 15067 states and 37779 transitions. [2021-02-19 18:33:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:33:55,177 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-02-19 18:33:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:55,190 INFO L225 Difference]: With dead ends: 15067 [2021-02-19 18:33:55,190 INFO L226 Difference]: Without dead ends: 14863 [2021-02-19 18:33:55,191 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=449, Invalid=3457, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:33:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14863 states. [2021-02-19 18:33:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14863 to 7391. [2021-02-19 18:33:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7391 states, 7390 states have (on average 2.4761840324763194) internal successors, (18299), 7390 states have internal predecessors, (18299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 18299 transitions. [2021-02-19 18:33:55,290 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 18299 transitions. Word has length 63 [2021-02-19 18:33:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:55,290 INFO L480 AbstractCegarLoop]: Abstraction has 7391 states and 18299 transitions. [2021-02-19 18:33:55,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 18299 transitions. [2021-02-19 18:33:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:33:55,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:55,295 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:55,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:55,496 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1365046528, now seen corresponding path program 87 times [2021-02-19 18:33:55,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:55,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60700792] [2021-02-19 18:33:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:56,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60700792] [2021-02-19 18:33:56,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221910386] [2021-02-19 18:33:56,082 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:56,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:33:56,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:56,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-02-19 18:33:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:57,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:57,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:57,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:57,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:57,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:57,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:33:57,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:57,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:57,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:57,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:33:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:57,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:57,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-02-19 18:33:57,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042357340] [2021-02-19 18:33:57,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:33:57,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:57,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:33:57,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:33:57,498 INFO L87 Difference]: Start difference. First operand 7391 states and 18299 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:00,659 INFO L93 Difference]: Finished difference Result 17687 states and 44071 transitions. [2021-02-19 18:34:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:34:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:00,675 INFO L225 Difference]: With dead ends: 17687 [2021-02-19 18:34:00,676 INFO L226 Difference]: Without dead ends: 17199 [2021-02-19 18:34:00,676 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:34:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17199 states. [2021-02-19 18:34:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17199 to 8783. [2021-02-19 18:34:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8783 states, 8782 states have (on average 2.4726713732634935) internal successors, (21715), 8782 states have internal predecessors, (21715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8783 states to 8783 states and 21715 transitions. [2021-02-19 18:34:00,789 INFO L78 Accepts]: Start accepts. Automaton has 8783 states and 21715 transitions. Word has length 65 [2021-02-19 18:34:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:00,789 INFO L480 AbstractCegarLoop]: Abstraction has 8783 states and 21715 transitions. [2021-02-19 18:34:00,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 8783 states and 21715 transitions. [2021-02-19 18:34:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:00,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:00,796 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:00,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:00,997 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash 429075712, now seen corresponding path program 88 times [2021-02-19 18:34:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:00,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594399679] [2021-02-19 18:34:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:01,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594399679] [2021-02-19 18:34:01,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139298277] [2021-02-19 18:34:01,565 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:01,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:34:01,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:34:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:02,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:02,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:34:02,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:02,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:02,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:02,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:34:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:02,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:02,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-02-19 18:34:02,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592827946] [2021-02-19 18:34:02,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:34:02,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:34:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:34:02,997 INFO L87 Difference]: Start difference. First operand 8783 states and 21715 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:05,493 INFO L93 Difference]: Finished difference Result 17207 states and 42771 transitions. [2021-02-19 18:34:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:34:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:05,512 INFO L225 Difference]: With dead ends: 17207 [2021-02-19 18:34:05,512 INFO L226 Difference]: Without dead ends: 17167 [2021-02-19 18:34:05,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=348, Invalid=3312, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:34:05,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17167 states. [2021-02-19 18:34:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17167 to 8847. [2021-02-19 18:34:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8846 states have (on average 2.472869093375537) internal successors, (21875), 8846 states have internal predecessors, (21875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 21875 transitions. [2021-02-19 18:34:05,634 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 21875 transitions. Word has length 65 [2021-02-19 18:34:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:05,634 INFO L480 AbstractCegarLoop]: Abstraction has 8847 states and 21875 transitions. [2021-02-19 18:34:05,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:05,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 21875 transitions. [2021-02-19 18:34:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:05,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:05,641 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:05,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-02-19 18:34:05,841 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -561074944, now seen corresponding path program 89 times [2021-02-19 18:34:05,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:05,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697827205] [2021-02-19 18:34:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:06,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697827205] [2021-02-19 18:34:06,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246823235] [2021-02-19 18:34:06,422 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:06,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:34:06,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:06,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-02-19 18:34:06,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:07,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:07,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:07,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:07,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:07,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:34:07,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:07,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:07,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:07,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:34:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:08,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:08,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:34:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314373553] [2021-02-19 18:34:08,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:34:08,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:34:08,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:34:08,030 INFO L87 Difference]: Start difference. First operand 8847 states and 21875 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:12,192 INFO L93 Difference]: Finished difference Result 19559 states and 48687 transitions. [2021-02-19 18:34:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:34:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:12,213 INFO L225 Difference]: With dead ends: 19559 [2021-02-19 18:34:12,213 INFO L226 Difference]: Without dead ends: 19071 [2021-02-19 18:34:12,214 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=348, Invalid=3434, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:34:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19071 states. [2021-02-19 18:34:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19071 to 8671. [2021-02-19 18:34:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8671 states, 8670 states have (on average 2.472318339100346) internal successors, (21435), 8670 states have internal predecessors, (21435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8671 states to 8671 states and 21435 transitions. [2021-02-19 18:34:12,354 INFO L78 Accepts]: Start accepts. Automaton has 8671 states and 21435 transitions. Word has length 65 [2021-02-19 18:34:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:12,354 INFO L480 AbstractCegarLoop]: Abstraction has 8671 states and 21435 transitions. [2021-02-19 18:34:12,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8671 states and 21435 transitions. [2021-02-19 18:34:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:12,361 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:12,361 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:12,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:12,562 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1233047296, now seen corresponding path program 90 times [2021-02-19 18:34:12,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:12,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951548912] [2021-02-19 18:34:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:13,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951548912] [2021-02-19 18:34:13,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7004424] [2021-02-19 18:34:13,228 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:13,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:34:13,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-02-19 18:34:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:14,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:14,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:14,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:14,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:14,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 55 [2021-02-19 18:34:14,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:14,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:14,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:14,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-02-19 18:34:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:14,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:14,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:34:14,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817277974] [2021-02-19 18:34:14,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:34:14,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:34:14,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:34:14,821 INFO L87 Difference]: Start difference. First operand 8671 states and 21435 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:19,172 INFO L93 Difference]: Finished difference Result 18647 states and 46371 transitions. [2021-02-19 18:34:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:34:19,174 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:19,194 INFO L225 Difference]: With dead ends: 18647 [2021-02-19 18:34:19,194 INFO L226 Difference]: Without dead ends: 18607 [2021-02-19 18:34:19,194 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=354, Invalid=3428, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:34:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2021-02-19 18:34:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 9135. [2021-02-19 18:34:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9135 states, 9134 states have (on average 2.4719728486971753) internal successors, (22579), 9134 states have internal predecessors, (22579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9135 states to 9135 states and 22579 transitions. [2021-02-19 18:34:19,331 INFO L78 Accepts]: Start accepts. Automaton has 9135 states and 22579 transitions. Word has length 65 [2021-02-19 18:34:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:19,331 INFO L480 AbstractCegarLoop]: Abstraction has 9135 states and 22579 transitions. [2021-02-19 18:34:19,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9135 states and 22579 transitions. [2021-02-19 18:34:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:19,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:19,337 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:19,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 18:34:19,538 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1521023232, now seen corresponding path program 91 times [2021-02-19 18:34:19,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:19,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014922410] [2021-02-19 18:34:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:20,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014922410] [2021-02-19 18:34:20,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442733676] [2021-02-19 18:34:20,263 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:34:20,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:21,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:21,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:21,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:21,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:21,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:34:21,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:21,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:21,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:21,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:34:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:22,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:22,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:34:22,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762300697] [2021-02-19 18:34:22,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:34:22,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:34:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:34:22,037 INFO L87 Difference]: Start difference. First operand 9135 states and 22579 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:25,705 INFO L93 Difference]: Finished difference Result 16943 states and 42063 transitions. [2021-02-19 18:34:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:34:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:25,723 INFO L225 Difference]: With dead ends: 16943 [2021-02-19 18:34:25,723 INFO L226 Difference]: Without dead ends: 16879 [2021-02-19 18:34:25,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=303, Invalid=2889, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:34:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16879 states. [2021-02-19 18:34:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16879 to 9631. [2021-02-19 18:34:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9631 states, 9630 states have (on average 2.4667705088265834) internal successors, (23755), 9630 states have internal predecessors, (23755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9631 states to 9631 states and 23755 transitions. [2021-02-19 18:34:25,852 INFO L78 Accepts]: Start accepts. Automaton has 9631 states and 23755 transitions. Word has length 65 [2021-02-19 18:34:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:25,853 INFO L480 AbstractCegarLoop]: Abstraction has 9631 states and 23755 transitions. [2021-02-19 18:34:25,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 9631 states and 23755 transitions. [2021-02-19 18:34:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:25,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:25,860 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:26,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:26,061 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:26,061 INFO L82 PathProgramCache]: Analyzing trace with hash -585043712, now seen corresponding path program 92 times [2021-02-19 18:34:26,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:26,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445687847] [2021-02-19 18:34:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:34:26,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445687847] [2021-02-19 18:34:26,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97844276] [2021-02-19 18:34:26,576 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:26,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:34:26,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:26,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:34:26,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:28,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:28,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:28,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:28,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:34:28,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:28,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:28,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:28,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:34:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 13 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:28,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:28,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 30 [2021-02-19 18:34:28,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836627296] [2021-02-19 18:34:28,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:34:28,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:34:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:34:28,151 INFO L87 Difference]: Start difference. First operand 9631 states and 23755 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:30,803 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2021-02-19 18:34:31,314 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-02-19 18:34:31,622 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-02-19 18:34:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:32,062 INFO L93 Difference]: Finished difference Result 14039 states and 34689 transitions. [2021-02-19 18:34:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:34:32,063 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:32,078 INFO L225 Difference]: With dead ends: 14039 [2021-02-19 18:34:32,078 INFO L226 Difference]: Without dead ends: 13599 [2021-02-19 18:34:32,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:34:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-02-19 18:34:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 10623. [2021-02-19 18:34:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10623 states, 10622 states have (on average 2.4668612314065146) internal successors, (26203), 10622 states have internal predecessors, (26203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10623 states to 10623 states and 26203 transitions. [2021-02-19 18:34:32,221 INFO L78 Accepts]: Start accepts. Automaton has 10623 states and 26203 transitions. Word has length 65 [2021-02-19 18:34:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:32,221 INFO L480 AbstractCegarLoop]: Abstraction has 10623 states and 26203 transitions. [2021-02-19 18:34:32,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 10623 states and 26203 transitions. [2021-02-19 18:34:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:32,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:32,230 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:32,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:32,430 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2091707648, now seen corresponding path program 93 times [2021-02-19 18:34:32,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:32,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588894282] [2021-02-19 18:34:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:33,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588894282] [2021-02-19 18:34:33,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124669821] [2021-02-19 18:34:33,040 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:33,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:34:33,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:34:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:34,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:34,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:34,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:34,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:34,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:34:34,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:34,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:34,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:34,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:34:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:34,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:34,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2021-02-19 18:34:34,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998027578] [2021-02-19 18:34:34,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:34:34,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:34:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:34:34,777 INFO L87 Difference]: Start difference. First operand 10623 states and 26203 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:38,703 INFO L93 Difference]: Finished difference Result 17335 states and 43067 transitions. [2021-02-19 18:34:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:34:38,705 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:38,723 INFO L225 Difference]: With dead ends: 17335 [2021-02-19 18:34:38,724 INFO L226 Difference]: Without dead ends: 17247 [2021-02-19 18:34:38,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=271, Invalid=2591, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:34:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17247 states. [2021-02-19 18:34:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17247 to 10479. [2021-02-19 18:34:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 2.4664058026340903) internal successors, (25843), 10478 states have internal predecessors, (25843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 25843 transitions. [2021-02-19 18:34:38,865 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 25843 transitions. Word has length 65 [2021-02-19 18:34:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:38,865 INFO L480 AbstractCegarLoop]: Abstraction has 10479 states and 25843 transitions. [2021-02-19 18:34:38,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 25843 transitions. [2021-02-19 18:34:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:38,874 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:38,874 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:39,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 18:34:39,075 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:39,075 INFO L82 PathProgramCache]: Analyzing trace with hash 961977088, now seen corresponding path program 94 times [2021-02-19 18:34:39,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:39,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152789321] [2021-02-19 18:34:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:39,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152789321] [2021-02-19 18:34:39,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274760446] [2021-02-19 18:34:39,920 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:39,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:34:39,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:39,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:34:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:41,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:41,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:41,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:41,765 INFO L244 Elim1Store]: Index analysis took 106 ms [2021-02-19 18:34:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:34:41,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:41,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:41,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:41,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:34:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:41,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:41,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:34:41,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961492874] [2021-02-19 18:34:41,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:34:41,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:41,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:34:41,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:34:41,847 INFO L87 Difference]: Start difference. First operand 10479 states and 25843 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:44,659 INFO L93 Difference]: Finished difference Result 18791 states and 46883 transitions. [2021-02-19 18:34:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:34:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:44,679 INFO L225 Difference]: With dead ends: 18791 [2021-02-19 18:34:44,680 INFO L226 Difference]: Without dead ends: 18607 [2021-02-19 18:34:44,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:34:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2021-02-19 18:34:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 10543. [2021-02-19 18:34:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10543 states, 10542 states have (on average 2.466609751470309) internal successors, (26003), 10542 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10543 states to 10543 states and 26003 transitions. [2021-02-19 18:34:44,825 INFO L78 Accepts]: Start accepts. Automaton has 10543 states and 26003 transitions. Word has length 65 [2021-02-19 18:34:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:44,825 INFO L480 AbstractCegarLoop]: Abstraction has 10543 states and 26003 transitions. [2021-02-19 18:34:44,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 10543 states and 26003 transitions. [2021-02-19 18:34:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:44,834 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:44,834 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:45,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 18:34:45,037 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash -401270016, now seen corresponding path program 95 times [2021-02-19 18:34:45,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:45,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377774719] [2021-02-19 18:34:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:34:45,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377774719] [2021-02-19 18:34:45,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838929089] [2021-02-19 18:34:45,646 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:45,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:34:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-02-19 18:34:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:47,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:47,784 INFO L244 Elim1Store]: Index analysis took 104 ms [2021-02-19 18:34:47,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 44 [2021-02-19 18:34:47,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:47,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:34:47,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:47,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:116, output treesize:3 [2021-02-19 18:34:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 20 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:47,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:47,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 33 [2021-02-19 18:34:47,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954759768] [2021-02-19 18:34:47,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:34:47,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:34:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:34:47,893 INFO L87 Difference]: Start difference. First operand 10543 states and 26003 transitions. Second operand has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:50,453 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-02-19 18:34:50,701 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-02-19 18:34:51,022 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-02-19 18:34:51,637 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-02-19 18:34:51,987 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-02-19 18:34:53,392 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 58 [2021-02-19 18:34:53,865 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2021-02-19 18:34:54,314 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-02-19 18:34:54,836 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2021-02-19 18:34:55,377 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 74 [2021-02-19 18:34:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:56,050 INFO L93 Difference]: Finished difference Result 13911 states and 34321 transitions. [2021-02-19 18:34:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:34:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:34:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:56,063 INFO L225 Difference]: With dead ends: 13911 [2021-02-19 18:34:56,064 INFO L226 Difference]: Without dead ends: 13471 [2021-02-19 18:34:56,064 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=325, Invalid=3215, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:34:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13471 states. [2021-02-19 18:34:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13471 to 11215. [2021-02-19 18:34:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11215 states, 11214 states have (on average 2.465757089352595) internal successors, (27651), 11214 states have internal predecessors, (27651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11215 states to 11215 states and 27651 transitions. [2021-02-19 18:34:56,192 INFO L78 Accepts]: Start accepts. Automaton has 11215 states and 27651 transitions. Word has length 65 [2021-02-19 18:34:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:56,193 INFO L480 AbstractCegarLoop]: Abstraction has 11215 states and 27651 transitions. [2021-02-19 18:34:56,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11215 states and 27651 transitions. [2021-02-19 18:34:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:34:56,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:56,203 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:56,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:56,403 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:56,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1907933952, now seen corresponding path program 96 times [2021-02-19 18:34:56,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:56,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186663323] [2021-02-19 18:34:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:57,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186663323] [2021-02-19 18:34:57,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024847080] [2021-02-19 18:34:57,040 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:57,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:34:57,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:57,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-02-19 18:34:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:59,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:59,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:59,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:34:59,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:34:59,311 INFO L244 Elim1Store]: Index analysis took 124 ms [2021-02-19 18:34:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 55 [2021-02-19 18:34:59,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:34:59,350 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:34:59,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:34:59,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:161, output treesize:7 [2021-02-19 18:34:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:59,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:59,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2021-02-19 18:34:59,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533527351] [2021-02-19 18:34:59,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:34:59,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:59,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:34:59,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:34:59,422 INFO L87 Difference]: Start difference. First operand 11215 states and 27651 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:03,821 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-02-19 18:35:04,381 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 18:35:04,918 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 18:35:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:12,353 INFO L93 Difference]: Finished difference Result 17943 states and 44435 transitions. [2021-02-19 18:35:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:35:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:35:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:12,376 INFO L225 Difference]: With dead ends: 17943 [2021-02-19 18:35:12,376 INFO L226 Difference]: Without dead ends: 17551 [2021-02-19 18:35:12,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:35:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17551 states. [2021-02-19 18:35:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17551 to 11295. [2021-02-19 18:35:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11295 states, 11294 states have (on average 2.464582964405879) internal successors, (27835), 11294 states have internal predecessors, (27835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11295 states to 11295 states and 27835 transitions. [2021-02-19 18:35:12,523 INFO L78 Accepts]: Start accepts. Automaton has 11295 states and 27835 transitions. Word has length 65 [2021-02-19 18:35:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:12,524 INFO L480 AbstractCegarLoop]: Abstraction has 11295 states and 27835 transitions. [2021-02-19 18:35:12,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11295 states and 27835 transitions. [2021-02-19 18:35:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:35:12,533 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:12,533 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:12,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 18:35:12,733 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1932918528, now seen corresponding path program 97 times [2021-02-19 18:35:12,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:12,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345799611] [2021-02-19 18:35:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345799611] [2021-02-19 18:35:13,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726345222] [2021-02-19 18:35:13,761 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:35:13,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:15,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:15,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:15,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:16,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:16,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:16,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:16,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:35:16,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:35:16,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:35:16,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:35:16,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:35:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:16,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:16,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-02-19 18:35:16,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574595068] [2021-02-19 18:35:16,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:35:16,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:16,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:35:16,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:35:16,096 INFO L87 Difference]: Start difference. First operand 11295 states and 27835 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:19,743 INFO L93 Difference]: Finished difference Result 20967 states and 52067 transitions. [2021-02-19 18:35:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:35:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:35:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:19,766 INFO L225 Difference]: With dead ends: 20967 [2021-02-19 18:35:19,767 INFO L226 Difference]: Without dead ends: 20879 [2021-02-19 18:35:19,767 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=294, Invalid=2786, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:35:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20879 states. [2021-02-19 18:35:19,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20879 to 11391. [2021-02-19 18:35:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11391 states, 11390 states have (on average 2.462071992976295) internal successors, (28043), 11390 states have internal predecessors, (28043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11391 states to 11391 states and 28043 transitions. [2021-02-19 18:35:19,937 INFO L78 Accepts]: Start accepts. Automaton has 11391 states and 28043 transitions. Word has length 65 [2021-02-19 18:35:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:19,937 INFO L480 AbstractCegarLoop]: Abstraction has 11391 states and 28043 transitions. [2021-02-19 18:35:19,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 11391 states and 28043 transitions. [2021-02-19 18:35:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:35:19,947 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:19,947 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:20,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 18:35:20,148 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:20,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1145750784, now seen corresponding path program 98 times [2021-02-19 18:35:20,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:20,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383495144] [2021-02-19 18:35:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:21,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383495144] [2021-02-19 18:35:21,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352906981] [2021-02-19 18:35:21,213 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:21,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:35:21,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:35:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:23,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:23,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:23,600 INFO L244 Elim1Store]: Index analysis took 137 ms [2021-02-19 18:35:23,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:35:23,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:35:23,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:35:23,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:35:23,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:35:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:23,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:23,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:35:23,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271683729] [2021-02-19 18:35:23,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:35:23,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:23,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:35:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:35:23,698 INFO L87 Difference]: Start difference. First operand 11391 states and 28043 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:28,727 INFO L93 Difference]: Finished difference Result 19991 states and 49635 transitions. [2021-02-19 18:35:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:35:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:35:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:28,753 INFO L225 Difference]: With dead ends: 19991 [2021-02-19 18:35:28,754 INFO L226 Difference]: Without dead ends: 19903 [2021-02-19 18:35:28,754 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:35:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19903 states. [2021-02-19 18:35:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19903 to 11391. [2021-02-19 18:35:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11391 states, 11390 states have (on average 2.462071992976295) internal successors, (28043), 11390 states have internal predecessors, (28043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11391 states to 11391 states and 28043 transitions. [2021-02-19 18:35:28,944 INFO L78 Accepts]: Start accepts. Automaton has 11391 states and 28043 transitions. Word has length 65 [2021-02-19 18:35:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:28,945 INFO L480 AbstractCegarLoop]: Abstraction has 11391 states and 28043 transitions. [2021-02-19 18:35:28,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 11391 states and 28043 transitions. [2021-02-19 18:35:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:35:28,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:28,955 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:29,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 18:35:29,156 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:29,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1279629568, now seen corresponding path program 99 times [2021-02-19 18:35:29,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:29,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288873043] [2021-02-19 18:35:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:30,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288873043] [2021-02-19 18:35:30,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839766752] [2021-02-19 18:35:30,322 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:30,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:35:30,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:30,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:35:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:32,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:32,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:32,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:32,789 INFO L244 Elim1Store]: Index analysis took 141 ms [2021-02-19 18:35:32,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:35:32,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:35:32,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:35:32,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:35:32,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:35:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:32,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:32,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:35:32,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331473275] [2021-02-19 18:35:32,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:35:32,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:35:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:35:32,966 INFO L87 Difference]: Start difference. First operand 11391 states and 28043 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:38,704 INFO L93 Difference]: Finished difference Result 17783 states and 44027 transitions. [2021-02-19 18:35:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:35:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:35:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:38,726 INFO L225 Difference]: With dead ends: 17783 [2021-02-19 18:35:38,726 INFO L226 Difference]: Without dead ends: 17743 [2021-02-19 18:35:38,727 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:35:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17743 states. [2021-02-19 18:35:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17743 to 11407. [2021-02-19 18:35:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11407 states, 11406 states have (on average 2.4621251972645974) internal successors, (28083), 11406 states have internal predecessors, (28083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11407 states to 11407 states and 28083 transitions. [2021-02-19 18:35:38,886 INFO L78 Accepts]: Start accepts. Automaton has 11407 states and 28083 transitions. Word has length 65 [2021-02-19 18:35:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:38,886 INFO L480 AbstractCegarLoop]: Abstraction has 11407 states and 28083 transitions. [2021-02-19 18:35:38,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11407 states and 28083 transitions. [2021-02-19 18:35:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:35:38,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:38,896 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:39,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:39,097 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:39,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:39,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1712186624, now seen corresponding path program 100 times [2021-02-19 18:35:39,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:39,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948247070] [2021-02-19 18:35:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:40,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948247070] [2021-02-19 18:35:40,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037833289] [2021-02-19 18:35:40,199 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:40,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:35:40,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:35:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:42,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:42,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:42,618 INFO L244 Elim1Store]: Index analysis took 119 ms [2021-02-19 18:35:42,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:35:42,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:35:42,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:35:42,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:35:42,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:35:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:42,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:42,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-02-19 18:35:42,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879947609] [2021-02-19 18:35:42,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:35:42,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:42,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:35:42,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:35:42,727 INFO L87 Difference]: Start difference. First operand 11407 states and 28083 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:47,860 INFO L93 Difference]: Finished difference Result 22631 states and 56019 transitions. [2021-02-19 18:35:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:35:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:35:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:47,890 INFO L225 Difference]: With dead ends: 22631 [2021-02-19 18:35:47,890 INFO L226 Difference]: Without dead ends: 22543 [2021-02-19 18:35:47,891 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=349, Invalid=3311, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:35:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22543 states. [2021-02-19 18:35:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22543 to 13439. [2021-02-19 18:35:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 13438 states have (on average 2.461303765441286) internal successors, (33075), 13438 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 33075 transitions. [2021-02-19 18:35:48,111 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 33075 transitions. Word has length 65 [2021-02-19 18:35:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:48,111 INFO L480 AbstractCegarLoop]: Abstraction has 13439 states and 33075 transitions. [2021-02-19 18:35:48,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 33075 transitions. [2021-02-19 18:35:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:35:48,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:48,122 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:48,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 18:35:48,323 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash 476713728, now seen corresponding path program 101 times [2021-02-19 18:35:48,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:48,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521328476] [2021-02-19 18:35:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:49,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521328476] [2021-02-19 18:35:49,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947425304] [2021-02-19 18:35:49,259 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:49,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:35:49,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 65 conjunts are in the unsatisfiable core [2021-02-19 18:35:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:52,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:35:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:35:52,895 INFO L244 Elim1Store]: Index analysis took 156 ms [2021-02-19 18:35:52,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 55 [2021-02-19 18:35:52,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:35:52,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:35:52,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:35:52,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:154, output treesize:7 [2021-02-19 18:35:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 16 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:53,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 32 [2021-02-19 18:35:53,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942275534] [2021-02-19 18:35:53,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:35:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:53,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:35:53,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:35:53,021 INFO L87 Difference]: Start difference. First operand 13439 states and 33075 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:58,705 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-02-19 18:35:59,248 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-02-19 18:35:59,896 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-02-19 18:36:00,474 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-02-19 18:36:00,728 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 18:36:01,423 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-02-19 18:36:02,413 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-02-19 18:36:02,932 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-02-19 18:36:03,338 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 18:36:04,017 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-02-19 18:36:04,770 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2021-02-19 18:36:05,280 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-02-19 18:36:05,928 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-02-19 18:36:06,481 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-02-19 18:36:08,156 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2021-02-19 18:36:09,044 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 81 [2021-02-19 18:36:10,061 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2021-02-19 18:36:11,295 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 89 [2021-02-19 18:36:12,878 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 85 [2021-02-19 18:36:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:14,700 INFO L93 Difference]: Finished difference Result 21907 states and 53810 transitions. [2021-02-19 18:36:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:36:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:36:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:14,729 INFO L225 Difference]: With dead ends: 21907 [2021-02-19 18:36:14,729 INFO L226 Difference]: Without dead ends: 21255 [2021-02-19 18:36:14,729 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:36:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21255 states. [2021-02-19 18:36:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21255 to 18271. [2021-02-19 18:36:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18271 states, 18270 states have (on average 2.4600437876299943) internal successors, (44945), 18270 states have internal predecessors, (44945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18271 states to 18271 states and 44945 transitions. [2021-02-19 18:36:15,043 INFO L78 Accepts]: Start accepts. Automaton has 18271 states and 44945 transitions. Word has length 65 [2021-02-19 18:36:15,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:15,044 INFO L480 AbstractCegarLoop]: Abstraction has 18271 states and 44945 transitions. [2021-02-19 18:36:15,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:15,044 INFO L276 IsEmpty]: Start isEmpty. Operand 18271 states and 44945 transitions. [2021-02-19 18:36:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:36:15,062 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:15,062 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:15,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 18:36:15,262 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2023734528, now seen corresponding path program 102 times [2021-02-19 18:36:15,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:15,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045085069] [2021-02-19 18:36:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045085069] [2021-02-19 18:36:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479275875] [2021-02-19 18:36:16,515 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:16,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:36:16,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:36:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-02-19 18:36:16,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:18,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:18,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:18,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:18,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:18,999 INFO L244 Elim1Store]: Index analysis took 117 ms [2021-02-19 18:36:19,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:36:19,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:36:19,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:36:19,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:36:19,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:36:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:19,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:19,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-02-19 18:36:19,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660022309] [2021-02-19 18:36:19,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:36:19,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:19,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:36:19,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:36:19,091 INFO L87 Difference]: Start difference. First operand 18271 states and 44945 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:24,894 INFO L93 Difference]: Finished difference Result 26063 states and 64454 transitions. [2021-02-19 18:36:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:36:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:36:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:24,930 INFO L225 Difference]: With dead ends: 26063 [2021-02-19 18:36:24,931 INFO L226 Difference]: Without dead ends: 25623 [2021-02-19 18:36:24,931 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=322, Invalid=2984, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:36:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25623 states. [2021-02-19 18:36:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25623 to 18895. [2021-02-19 18:36:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18895 states, 18894 states have (on average 2.4600931512649518) internal successors, (46481), 18894 states have internal predecessors, (46481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18895 states to 18895 states and 46481 transitions. [2021-02-19 18:36:25,205 INFO L78 Accepts]: Start accepts. Automaton has 18895 states and 46481 transitions. Word has length 65 [2021-02-19 18:36:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:25,205 INFO L480 AbstractCegarLoop]: Abstraction has 18895 states and 46481 transitions. [2021-02-19 18:36:25,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 18895 states and 46481 transitions. [2021-02-19 18:36:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:36:25,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:25,224 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:25,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:25,424 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash 660487424, now seen corresponding path program 103 times [2021-02-19 18:36:25,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:25,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286038650] [2021-02-19 18:36:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:26,292 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-02-19 18:36:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:26,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286038650] [2021-02-19 18:36:26,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801942118] [2021-02-19 18:36:26,505 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:26,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:36:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:28,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:28,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:28,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:29,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:29,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:29,100 INFO L244 Elim1Store]: Index analysis took 123 ms [2021-02-19 18:36:29,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:36:29,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:36:29,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:36:29,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:36:29,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:36:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:29,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:29,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 30 [2021-02-19 18:36:29,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645581807] [2021-02-19 18:36:29,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:36:29,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:36:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:36:29,219 INFO L87 Difference]: Start difference. First operand 18895 states and 46481 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:35,435 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-02-19 18:36:35,938 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-02-19 18:36:36,483 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-02-19 18:36:37,025 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-02-19 18:36:37,658 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-02-19 18:36:38,259 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-02-19 18:36:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:38,941 INFO L93 Difference]: Finished difference Result 24763 states and 60856 transitions. [2021-02-19 18:36:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:36:38,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:36:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:38,972 INFO L225 Difference]: With dead ends: 24763 [2021-02-19 18:36:38,972 INFO L226 Difference]: Without dead ends: 24215 [2021-02-19 18:36:38,972 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=354, Invalid=3678, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:36:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24215 states. [2021-02-19 18:36:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24215 to 20703. [2021-02-19 18:36:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20703 states, 20702 states have (on average 2.460003864360931) internal successors, (50927), 20702 states have internal predecessors, (50927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20703 states to 20703 states and 50927 transitions. [2021-02-19 18:36:39,247 INFO L78 Accepts]: Start accepts. Automaton has 20703 states and 50927 transitions. Word has length 65 [2021-02-19 18:36:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:39,247 INFO L480 AbstractCegarLoop]: Abstraction has 20703 states and 50927 transitions. [2021-02-19 18:36:39,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 20703 states and 50927 transitions. [2021-02-19 18:36:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:36:39,266 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:39,266 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:39,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:39,467 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:39,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash -871161088, now seen corresponding path program 104 times [2021-02-19 18:36:39,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:39,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495819291] [2021-02-19 18:36:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:40,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495819291] [2021-02-19 18:36:40,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383758197] [2021-02-19 18:36:40,656 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:40,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:36:40,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:36:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:36:40,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:43,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:43,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:43,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:43,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:43,377 INFO L244 Elim1Store]: Index analysis took 163 ms [2021-02-19 18:36:43,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:36:43,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:36:43,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:36:43,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:36:43,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:36:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:43,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:43,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 32 [2021-02-19 18:36:43,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896923578] [2021-02-19 18:36:43,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:36:43,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:43,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:36:43,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:36:43,507 INFO L87 Difference]: Start difference. First operand 20703 states and 50927 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:50,422 INFO L93 Difference]: Finished difference Result 34975 states and 86788 transitions. [2021-02-19 18:36:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:36:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:36:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:50,471 INFO L225 Difference]: With dead ends: 34975 [2021-02-19 18:36:50,471 INFO L226 Difference]: Without dead ends: 34791 [2021-02-19 18:36:50,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=298, Invalid=2782, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:36:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34791 states. [2021-02-19 18:36:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34791 to 21055. [2021-02-19 18:36:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21055 states, 21054 states have (on average 2.460292580982236) internal successors, (51799), 21054 states have internal predecessors, (51799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21055 states to 21055 states and 51799 transitions. [2021-02-19 18:36:50,819 INFO L78 Accepts]: Start accepts. Automaton has 21055 states and 51799 transitions. Word has length 65 [2021-02-19 18:36:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:50,819 INFO L480 AbstractCegarLoop]: Abstraction has 21055 states and 51799 transitions. [2021-02-19 18:36:50,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21055 states and 51799 transitions. [2021-02-19 18:36:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:36:50,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:50,840 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:51,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:51,040 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:51,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2087459072, now seen corresponding path program 105 times [2021-02-19 18:36:51,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:51,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974072398] [2021-02-19 18:36:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:52,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974072398] [2021-02-19 18:36:52,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766897065] [2021-02-19 18:36:52,401 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:52,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:36:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:36:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-02-19 18:36:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:55,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:55,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:55,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:56,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:56,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:36:56,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:56,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:36:56,090 INFO L244 Elim1Store]: Index analysis took 201 ms [2021-02-19 18:36:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-02-19 18:36:56,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:36:56,152 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:36:56,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:36:56,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-02-19 18:36:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:56,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:56,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:36:56,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037915742] [2021-02-19 18:36:56,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:36:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:36:56,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:36:56,259 INFO L87 Difference]: Start difference. First operand 21055 states and 51799 transitions. Second operand has 35 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:57,240 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-02-19 18:36:57,800 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-02-19 18:36:58,487 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-02-19 18:36:58,944 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-02-19 18:36:59,324 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-02-19 18:36:59,836 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-02-19 18:37:00,172 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-02-19 18:37:00,496 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 18:37:00,778 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-02-19 18:37:02,353 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-02-19 18:37:03,082 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:37:03,727 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-02-19 18:37:04,044 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-02-19 18:37:05,187 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 18:37:06,639 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-02-19 18:37:07,073 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-02-19 18:37:08,411 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-02-19 18:37:09,141 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-02-19 18:37:09,876 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-02-19 18:37:10,780 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-02-19 18:37:11,443 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-02-19 18:37:12,587 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-02-19 18:37:13,461 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-02-19 18:37:14,077 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-02-19 18:37:15,628 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-02-19 18:37:16,428 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2021-02-19 18:37:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:17,992 INFO L93 Difference]: Finished difference Result 31139 states and 76994 transitions. [2021-02-19 18:37:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:37:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:37:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:18,034 INFO L225 Difference]: With dead ends: 31139 [2021-02-19 18:37:18,034 INFO L226 Difference]: Without dead ends: 30327 [2021-02-19 18:37:18,034 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=563, Invalid=6079, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:37:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30327 states. [2021-02-19 18:37:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30327 to 21823. [2021-02-19 18:37:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21823 states, 21822 states have (on average 2.460956832554303) internal successors, (53703), 21822 states have internal predecessors, (53703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21823 states to 21823 states and 53703 transitions. [2021-02-19 18:37:18,363 INFO L78 Accepts]: Start accepts. Automaton has 21823 states and 53703 transitions. Word has length 65 [2021-02-19 18:37:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:18,363 INFO L480 AbstractCegarLoop]: Abstraction has 21823 states and 53703 transitions. [2021-02-19 18:37:18,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 21823 states and 53703 transitions. [2021-02-19 18:37:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:37:18,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:18,384 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:18,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:18,584 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash -217872128, now seen corresponding path program 106 times [2021-02-19 18:37:18,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:18,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302666852] [2021-02-19 18:37:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:20,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302666852] [2021-02-19 18:37:20,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095302043] [2021-02-19 18:37:20,018 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:20,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:37:20,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:37:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:22,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:22,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:22,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:22,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:22,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:22,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:22,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:23,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:23,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:23,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:23,144 INFO L244 Elim1Store]: Index analysis took 168 ms [2021-02-19 18:37:23,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:37:23,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:37:23,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:37:23,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:37:23,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:37:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:23,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:23,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-02-19 18:37:23,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402943260] [2021-02-19 18:37:23,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:37:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:37:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:37:23,284 INFO L87 Difference]: Start difference. First operand 21823 states and 53703 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:30,232 INFO L93 Difference]: Finished difference Result 28055 states and 69279 transitions. [2021-02-19 18:37:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:37:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:37:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:30,273 INFO L225 Difference]: With dead ends: 28055 [2021-02-19 18:37:30,273 INFO L226 Difference]: Without dead ends: 28015 [2021-02-19 18:37:30,273 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=299, Invalid=2781, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:37:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28015 states. [2021-02-19 18:37:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28015 to 21823. [2021-02-19 18:37:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21823 states, 21822 states have (on average 2.460956832554303) internal successors, (53703), 21822 states have internal predecessors, (53703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21823 states to 21823 states and 53703 transitions. [2021-02-19 18:37:30,585 INFO L78 Accepts]: Start accepts. Automaton has 21823 states and 53703 transitions. Word has length 65 [2021-02-19 18:37:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:30,585 INFO L480 AbstractCegarLoop]: Abstraction has 21823 states and 53703 transitions. [2021-02-19 18:37:30,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 21823 states and 53703 transitions. [2021-02-19 18:37:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:37:30,606 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:30,606 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:30,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 18:37:30,806 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash 580740864, now seen corresponding path program 107 times [2021-02-19 18:37:30,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:30,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817338618] [2021-02-19 18:37:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817338618] [2021-02-19 18:37:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655027795] [2021-02-19 18:37:32,427 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:32,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:37:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-02-19 18:37:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:35,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:35,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:35,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:35,448 INFO L244 Elim1Store]: Index analysis took 144 ms [2021-02-19 18:37:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:37:35,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:37:35,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:37:35,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:37:35,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:37:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:35,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:35,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-02-19 18:37:35,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577343223] [2021-02-19 18:37:35,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:37:35,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:37:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:37:35,620 INFO L87 Difference]: Start difference. First operand 21823 states and 53703 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:47,254 INFO L93 Difference]: Finished difference Result 35811 states and 88446 transitions. [2021-02-19 18:37:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:37:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:37:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:47,306 INFO L225 Difference]: With dead ends: 35811 [2021-02-19 18:37:47,307 INFO L226 Difference]: Without dead ends: 35335 [2021-02-19 18:37:47,307 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=342, Invalid=3080, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:37:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35335 states. [2021-02-19 18:37:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35335 to 23391. [2021-02-19 18:37:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23391 states, 23390 states have (on average 2.463232150491663) internal successors, (57615), 23390 states have internal predecessors, (57615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23391 states to 23391 states and 57615 transitions. [2021-02-19 18:37:47,689 INFO L78 Accepts]: Start accepts. Automaton has 23391 states and 57615 transitions. Word has length 65 [2021-02-19 18:37:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:47,689 INFO L480 AbstractCegarLoop]: Abstraction has 23391 states and 57615 transitions. [2021-02-19 18:37:47,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23391 states and 57615 transitions. [2021-02-19 18:37:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:37:47,713 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:47,713 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:47,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 18:37:47,913 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:47,914 INFO L82 PathProgramCache]: Analyzing trace with hash 764514560, now seen corresponding path program 108 times [2021-02-19 18:37:47,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:47,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577076802] [2021-02-19 18:37:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:49,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577076802] [2021-02-19 18:37:49,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989483115] [2021-02-19 18:37:49,452 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:49,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:37:49,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-02-19 18:37:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:52,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:53,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:53,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:37:53,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:37:53,122 INFO L244 Elim1Store]: Index analysis took 179 ms [2021-02-19 18:37:53,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-02-19 18:37:53,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:37:53,200 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-02-19 18:37:53,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:37:53,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:161, output treesize:7 [2021-02-19 18:37:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:53,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:53,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-02-19 18:37:53,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63670314] [2021-02-19 18:37:53,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:37:53,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:37:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:37:53,322 INFO L87 Difference]: Start difference. First operand 23391 states and 57615 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:59,541 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-02-19 18:38:00,475 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 18:38:01,448 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-02-19 18:38:02,189 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 18:38:02,773 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-02-19 18:38:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:38:04,378 INFO L93 Difference]: Finished difference Result 35651 states and 88262 transitions. [2021-02-19 18:38:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:38:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:38:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:38:04,431 INFO L225 Difference]: With dead ends: 35651 [2021-02-19 18:38:04,431 INFO L226 Difference]: Without dead ends: 35207 [2021-02-19 18:38:04,431 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=331, Invalid=2975, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:38:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35207 states. [2021-02-19 18:38:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35207 to 23791. [2021-02-19 18:38:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23791 states, 23790 states have (on average 2.4635140815468684) internal successors, (58607), 23790 states have internal predecessors, (58607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23791 states to 23791 states and 58607 transitions. [2021-02-19 18:38:04,836 INFO L78 Accepts]: Start accepts. Automaton has 23791 states and 58607 transitions. Word has length 65 [2021-02-19 18:38:04,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:38:04,836 INFO L480 AbstractCegarLoop]: Abstraction has 23791 states and 58607 transitions. [2021-02-19 18:38:04,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 23791 states and 58607 transitions. [2021-02-19 18:38:04,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:38:04,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:38:04,863 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:38:05,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 18:38:05,063 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:38:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:38:05,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1660865792, now seen corresponding path program 109 times [2021-02-19 18:38:05,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:38:05,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258318523] [2021-02-19 18:38:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:38:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:06,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258318523] [2021-02-19 18:38:06,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835514406] [2021-02-19 18:38:06,845 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:38:06,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:38:10,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:10,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:10,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:10,241 INFO L244 Elim1Store]: Index analysis took 150 ms [2021-02-19 18:38:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:38:10,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:38:10,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:38:10,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:38:10,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:38:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:10,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:38:10,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-02-19 18:38:10,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894738824] [2021-02-19 18:38:10,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:38:10,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:38:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:38:10,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:38:10,409 INFO L87 Difference]: Start difference. First operand 23791 states and 58607 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:17,560 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 18:38:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:38:18,449 INFO L93 Difference]: Finished difference Result 32311 states and 79847 transitions. [2021-02-19 18:38:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:38:18,453 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:38:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:38:18,499 INFO L225 Difference]: With dead ends: 32311 [2021-02-19 18:38:18,499 INFO L226 Difference]: Without dead ends: 32271 [2021-02-19 18:38:18,500 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:38:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2021-02-19 18:38:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 23791. [2021-02-19 18:38:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23791 states, 23790 states have (on average 2.4635140815468684) internal successors, (58607), 23790 states have internal predecessors, (58607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23791 states to 23791 states and 58607 transitions. [2021-02-19 18:38:18,878 INFO L78 Accepts]: Start accepts. Automaton has 23791 states and 58607 transitions. Word has length 65 [2021-02-19 18:38:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:38:18,878 INFO L480 AbstractCegarLoop]: Abstraction has 23791 states and 58607 transitions. [2021-02-19 18:38:18,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 23791 states and 58607 transitions. [2021-02-19 18:38:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:38:18,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:38:18,904 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:38:19,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:19,105 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:38:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:38:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1259927296, now seen corresponding path program 110 times [2021-02-19 18:38:19,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:38:19,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199574565] [2021-02-19 18:38:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:38:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:20,280 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-02-19 18:38:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:20,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199574565] [2021-02-19 18:38:20,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809968501] [2021-02-19 18:38:20,574 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:20,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:38:20,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:38:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 18:38:20,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:38:23,384 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 18:38:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:23,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:23,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:24,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:24,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:24,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:24,006 INFO L244 Elim1Store]: Index analysis took 199 ms [2021-02-19 18:38:24,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-02-19 18:38:24,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:38:24,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:38:24,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:38:24,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-02-19 18:38:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:24,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:38:24,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 28 [2021-02-19 18:38:24,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151328158] [2021-02-19 18:38:24,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:38:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:38:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:38:24,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:38:24,175 INFO L87 Difference]: Start difference. First operand 23791 states and 58607 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:33,913 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-19 18:38:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:38:36,443 INFO L93 Difference]: Finished difference Result 35027 states and 86208 transitions. [2021-02-19 18:38:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:38:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 18:38:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:38:36,499 INFO L225 Difference]: With dead ends: 35027 [2021-02-19 18:38:36,499 INFO L226 Difference]: Without dead ends: 34615 [2021-02-19 18:38:36,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:38:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34615 states. [2021-02-19 18:38:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34615 to 24943. [2021-02-19 18:38:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24943 states, 24942 states have (on average 2.4647983321305427) internal successors, (61477), 24942 states have internal predecessors, (61477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24943 states to 24943 states and 61477 transitions. [2021-02-19 18:38:36,938 INFO L78 Accepts]: Start accepts. Automaton has 24943 states and 61477 transitions. Word has length 65 [2021-02-19 18:38:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:38:36,938 INFO L480 AbstractCegarLoop]: Abstraction has 24943 states and 61477 transitions. [2021-02-19 18:38:36,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24943 states and 61477 transitions. [2021-02-19 18:38:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 18:38:36,963 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:38:36,963 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:38:37,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 18:38:37,163 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:38:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:38:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash 287093504, now seen corresponding path program 111 times [2021-02-19 18:38:37,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:38:37,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275679236] [2021-02-19 18:38:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:38:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:39,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275679236] [2021-02-19 18:38:39,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934312] [2021-02-19 18:38:39,031 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:39,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 18:38:39,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:38:39,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-02-19 18:38:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:38:44,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:44,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:44,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:44,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:38:44,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:38:44,521 INFO L244 Elim1Store]: Index analysis took 237 ms [2021-02-19 18:38:44,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-02-19 18:38:44,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:38:44,609 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 18:38:44,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:38:44,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-02-19 18:38:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:44,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:38:44,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-02-19 18:38:44,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440487579] [2021-02-19 18:38:44,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:38:44,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:38:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:38:44,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:38:44,753 INFO L87 Difference]: Start difference. First operand 24943 states and 61477 transitions. Second operand has 35 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:48,341 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-02-19 18:38:49,737 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-02-19 18:38:50,835 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-02-19 18:38:52,115 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-02-19 18:38:52,492 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-02-19 18:38:53,426 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-02-19 18:38:55,128 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2021-02-19 18:38:55,720 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-02-19 18:38:56,605 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:38:57,394 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-02-19 18:38:57,893 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-02-19 18:38:59,355 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 18:39:00,586 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-02-19 18:39:01,820 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-02-19 18:39:02,691 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-02-19 18:39:04,884 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 Received shutdown request... [2021-02-19 18:39:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:39:05,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:05,419 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 18:39:05,423 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 18:39:05,424 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:39:05 BasicIcfg [2021-02-19 18:39:05,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:39:05,424 INFO L168 Benchmark]: Toolchain (without parser) took 545769.06 ms. Allocated memory was 255.9 MB in the beginning and 859.8 MB in the end (delta: 604.0 MB). Free memory was 236.8 MB in the beginning and 348.1 MB in the end (delta: -111.2 MB). Peak memory consumption was 494.5 MB. Max. memory is 16.0 GB. [2021-02-19 18:39:05,424 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 237.8 MB in the end (delta: 183.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:39:05,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.82 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:39:05,424 INFO L168 Benchmark]: Boogie Preprocessor took 15.01 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 234.0 MB in the end (delta: 787.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:39:05,424 INFO L168 Benchmark]: RCFGBuilder took 271.20 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 236.6 MB in the end (delta: -2.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.0 GB. [2021-02-19 18:39:05,424 INFO L168 Benchmark]: TraceAbstraction took 545451.10 ms. Allocated memory was 255.9 MB in the beginning and 859.8 MB in the end (delta: 604.0 MB). Free memory was 236.6 MB in the beginning and 348.1 MB in the end (delta: -111.4 MB). Peak memory consumption was 492.7 MB. Max. memory is 16.0 GB. [2021-02-19 18:39:05,425 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 237.8 MB in the end (delta: 183.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.82 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.01 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 234.0 MB in the end (delta: 787.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 271.20 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 236.6 MB in the end (delta: -2.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 545451.10 ms. Allocated memory was 255.9 MB in the beginning and 859.8 MB in the end (delta: 604.0 MB). Free memory was 236.6 MB in the beginning and 348.1 MB in the end (delta: -111.4 MB). Peak memory consumption was 492.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 68). Cancelled while BasicCegarLoop was constructing difference of abstraction (24943states) and FLOYD_HOARE automaton (currently 43 states, 35 states before enhancement),while ReachableStatesComputation was computing reachable states (10219 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 545.3s, OverallIterations: 118, TraceHistogramMax: 8, AutomataDifference: 337.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8648 SDtfs, 23461 SDslu, 112242 SDs, 0 SdLazy, 120714 SolverSat, 5952 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 125.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10037 GetRequests, 4902 SyntacticMatches, 339 SemanticMatches, 4796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58538 ImplicationChecksByTransitivity, 240.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24943occurred in iteration=117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.9s AutomataMinimizationTime, 117 MinimizatonAttempts, 398352 StatesRemovedByMinimization, 114 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 166.5s InterpolantComputationTime, 12300 NumberOfCodeBlocks, 12300 NumberOfCodeBlocksAsserted, 579 NumberOfCheckSat, 12068 ConstructedInterpolants, 834 QuantifiedInterpolants, 21342002 SizeOfPredicates, 248 NumberOfNonLiveVariables, 13498 ConjunctsInSsa, 5631 ConjunctsInUnsatCore, 232 InterpolantComputations, 5 PerfectInterpolantSequences, 1961/23903 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown