/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:12:28,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:12:28,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:12:28,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:12:28,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:12:28,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:12:28,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:12:28,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:12:28,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:12:28,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:12:28,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:12:28,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:12:28,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:12:28,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:12:28,349 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:12:28,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:12:28,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:12:28,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:12:28,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:12:28,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:12:28,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:12:28,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:12:28,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:12:28,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:12:28,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:12:28,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:12:28,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:12:28,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:12:28,352 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:12:28,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:12:28,352 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:12:28,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:12:28,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:12:28,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:12:28,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:12:28,605 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:12:28,605 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:12:28,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl [2021-06-05 16:12:28,606 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl' [2021-06-05 16:12:28,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:12:28,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:12:28,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:12:28,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:12:28,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:12:28,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:12:28,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:12:28,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:12:28,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:12:28,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/1) ... [2021-06-05 16:12:28,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:12:28,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:12:28,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:12:28,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:12:28,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (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 [2021-06-05 16:12:28,751 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:12:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:12:28,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:12:28,751 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:12:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:12:28,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:12:28,751 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:12:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:12:28,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:12:28,752 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:12:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:12:28,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:12:28,752 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 16:12:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 16:12:28,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 16:12:28,753 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:12:28,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:12:28,954 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:12:28,955 INFO L202 PluginConnector]: Adding new model buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:12:28 BoogieIcfgContainer [2021-06-05 16:12:28,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:12:28,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:12:28,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:12:28,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:12:28,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:12:28" (1/2) ... [2021-06-05 16:12:28,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5265a759 and model type buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:12:28, skipping insertion in model container [2021-06-05 16:12:28,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:12:28" (2/2) ... [2021-06-05 16:12:28,964 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult.wvr.bpl [2021-06-05 16:12:28,967 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:12:28,967 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:12:28,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:12:28,968 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:12:29,021 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 16:12:29,034 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 16:12:29,045 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:12:29,046 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:12:29,046 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:12:29,046 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:12:29,046 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:12:29,046 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:12:29,046 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:12:29,046 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:12:29,051 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 16:12:29,108 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 16:12:29,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:29,128 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:29,128 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:29,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-06-05 16:12:29,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:29,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542473290] [2021-06-05 16:12:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:29,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:29,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542473290] [2021-06-05 16:12:29,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542473290] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:29,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:12:29,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:12:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459082536] [2021-06-05 16:12:29,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:12:29,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:12:29,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:12:29,286 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 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) [2021-06-05 16:12:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:29,336 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-06-05 16:12:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:12:29,337 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 [2021-06-05 16:12:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:29,362 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 16:12:29,363 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 16:12:29,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:12:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 16:12:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-06-05 16:12:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-06-05 16:12:29,451 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-06-05 16:12:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:29,452 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-06-05 16:12:29,452 INFO L483 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) [2021-06-05 16:12:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-06-05 16:12:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:12:29,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:29,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:29,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:12:29,457 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-06-05 16:12:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:29,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189498999] [2021-06-05 16:12:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:29,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:29,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189498999] [2021-06-05 16:12:29,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189498999] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:29,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:12:29,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:12:29,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185805747] [2021-06-05 16:12:29,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:12:29,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:12:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:12:29,528 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:29,582 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-06-05 16:12:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:12:29,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:12:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:29,594 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:12:29,594 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 16:12:29,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:12:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 16:12:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-06-05 16:12:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-06-05 16:12:29,629 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-06-05 16:12:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:29,629 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-06-05 16:12:29,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-06-05 16:12:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:12:29,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:29,632 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:29,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:12:29,633 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-06-05 16:12:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:29,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130246061] [2021-06-05 16:12:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:29,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:29,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130246061] [2021-06-05 16:12:29,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130246061] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:29,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:12:29,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:12:29,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451516839] [2021-06-05 16:12:29,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:12:29,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:12:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:12:29,686 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:29,733 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-06-05 16:12:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:12:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:12:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:29,745 INFO L225 Difference]: With dead ends: 2017 [2021-06-05 16:12:29,748 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 16:12:29,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:12:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 16:12:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-06-05 16:12:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-06-05 16:12:29,789 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-06-05 16:12:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:29,789 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-06-05 16:12:29,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-06-05 16:12:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:12:29,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:29,794 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:29,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:12:29,795 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-06-05 16:12:29,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:29,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829556563] [2021-06-05 16:12:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:29,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:29,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829556563] [2021-06-05 16:12:29,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829556563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:29,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756070666] [2021-06-05 16:12:29,842 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 [2021-06-05 16:12:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:29,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:12:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:30,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756070666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:30,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:30,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 16:12:30,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997806314] [2021-06-05 16:12:30,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:12:30,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:30,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:12:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:12:30,001 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:30,090 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-06-05 16:12:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:12:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:30,100 INFO L225 Difference]: With dead ends: 2308 [2021-06-05 16:12:30,100 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 16:12:30,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:12:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 16:12:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-06-05 16:12:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-06-05 16:12:30,139 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-06-05 16:12:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:30,139 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-06-05 16:12:30,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-06-05 16:12:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:12:30,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:30,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:30,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:30,357 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1771388146, now seen corresponding path program 1 times [2021-06-05 16:12:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:30,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013511412] [2021-06-05 16:12:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:30,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:30,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013511412] [2021-06-05 16:12:30,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013511412] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:30,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:12:30,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:12:30,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574643367] [2021-06-05 16:12:30,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:12:30,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:30,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:12:30,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:12:30,374 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 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) [2021-06-05 16:12:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:30,422 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-06-05 16:12:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:12:30,423 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 24 [2021-06-05 16:12:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:30,430 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 16:12:30,430 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 16:12:30,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:12:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 16:12:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-06-05 16:12:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-06-05 16:12:30,466 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-06-05 16:12:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:30,466 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-06-05 16:12:30,466 INFO L483 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) [2021-06-05 16:12:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-06-05 16:12:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:12:30,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:30,469 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:30,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 16:12:30,469 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:30,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2115354510, now seen corresponding path program 2 times [2021-06-05 16:12:30,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:30,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45081275] [2021-06-05 16:12:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:30,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:30,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45081275] [2021-06-05 16:12:30,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45081275] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:30,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:12:30,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:12:30,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232228586] [2021-06-05 16:12:30,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:12:30,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:12:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:12:30,509 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 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) [2021-06-05 16:12:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:30,555 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-06-05 16:12:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:12:30,555 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 24 [2021-06-05 16:12:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:30,560 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 16:12:30,561 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 16:12:30,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:12:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 16:12:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-06-05 16:12:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-06-05 16:12:30,582 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-06-05 16:12:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:30,582 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-06-05 16:12:30,582 INFO L483 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) [2021-06-05 16:12:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-06-05 16:12:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:12:30,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:30,584 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:30,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 16:12:30,585 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-06-05 16:12:30,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:30,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251044141] [2021-06-05 16:12:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:30,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:30,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251044141] [2021-06-05 16:12:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251044141] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:30,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:12:30,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:12:30,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960198333] [2021-06-05 16:12:30,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:12:30,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:30,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:12:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:12:30,634 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 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) [2021-06-05 16:12:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:30,670 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-06-05 16:12:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:12:30,671 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 24 [2021-06-05 16:12:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:30,676 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 16:12:30,676 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 16:12:30,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:12:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 16:12:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-06-05 16:12:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-06-05 16:12:30,695 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-06-05 16:12:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:30,696 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-06-05 16:12:30,696 INFO L483 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) [2021-06-05 16:12:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-06-05 16:12:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:12:30,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:30,698 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:30,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 16:12:30,698 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash -896204878, now seen corresponding path program 1 times [2021-06-05 16:12:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:30,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445192984] [2021-06-05 16:12:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:30,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:30,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445192984] [2021-06-05 16:12:30,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445192984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:30,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830388034] [2021-06-05 16:12:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:30,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 16:12:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:30,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830388034] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:30,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 16:12:30,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 16:12:30,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231750212] [2021-06-05 16:12:30,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:12:30,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:30,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:12:30,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:12:30,810 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:30,824 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-06-05 16:12:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:12:30,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:12:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:30,829 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 16:12:30,829 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 16:12:30,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:12:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 16:12:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-06-05 16:12:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-06-05 16:12:30,847 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-06-05 16:12:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:30,848 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-06-05 16:12:30,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-06-05 16:12:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:12:30,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:30,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:31,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:31,065 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash 591603758, now seen corresponding path program 1 times [2021-06-05 16:12:31,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:31,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145309894] [2021-06-05 16:12:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:31,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:31,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145309894] [2021-06-05 16:12:31,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145309894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371310859] [2021-06-05 16:12:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:12:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 16:12:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:31,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371310859] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:12:31,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 16:12:31,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 16:12:31,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259505676] [2021-06-05 16:12:31,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:12:31,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:31,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:12:31,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:12:31,154 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:31,169 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-06-05 16:12:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:12:31,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:12:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:31,183 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 16:12:31,184 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 16:12:31,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:12:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 16:12:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-06-05 16:12:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-06-05 16:12:31,218 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-06-05 16:12:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:31,218 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-06-05 16:12:31,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-06-05 16:12:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:12:31,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:31,221 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:31,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:31,429 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1107902640, now seen corresponding path program 1 times [2021-06-05 16:12:31,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:31,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320984618] [2021-06-05 16:12:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:31,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:31,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320984618] [2021-06-05 16:12:31,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320984618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:31,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233993572] [2021-06-05 16:12:31,495 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 [2021-06-05 16:12:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:31,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:12:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:31,604 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 20 treesize of output 14 [2021-06-05 16:12:31,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:31,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:31,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:31,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 16:12:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:31,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233993572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:31,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:31,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 16:12:31,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359766243] [2021-06-05 16:12:31,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:12:31,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:31,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:12:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:31,651 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:31,730 INFO L93 Difference]: Finished difference Result 2469 states and 9254 transitions. [2021-06-05 16:12:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:31,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-06-05 16:12:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:31,736 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 16:12:31,736 INFO L226 Difference]: Without dead ends: 2390 [2021-06-05 16:12:31,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-06-05 16:12:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1615. [2021-06-05 16:12:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.7360594795539033) internal successors, (6030), 1614 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 6030 transitions. [2021-06-05 16:12:31,777 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 6030 transitions. Word has length 29 [2021-06-05 16:12:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:31,777 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 6030 transitions. [2021-06-05 16:12:31,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 6030 transitions. [2021-06-05 16:12:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:12:31,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:31,783 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:31,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:31,997 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash -769853710, now seen corresponding path program 2 times [2021-06-05 16:12:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:31,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144712888] [2021-06-05 16:12:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:32,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144712888] [2021-06-05 16:12:32,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144712888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035365737] [2021-06-05 16:12:32,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:32,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:12:32,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:32,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:12:32,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:32,160 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 20 treesize of output 14 [2021-06-05 16:12:32,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:32,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:32,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:32,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 16:12:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035365737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:32,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:32,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 16:12:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378602517] [2021-06-05 16:12:32,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:12:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:12:32,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:32,188 INFO L87 Difference]: Start difference. First operand 1615 states and 6030 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-06-05 16:12:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:32,260 INFO L93 Difference]: Finished difference Result 2566 states and 9644 transitions. [2021-06-05 16:12:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 29 [2021-06-05 16:12:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:32,267 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 16:12:32,267 INFO L226 Difference]: Without dead ends: 2487 [2021-06-05 16:12:32,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-05 16:12:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1741. [2021-06-05 16:12:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.7379310344827585) internal successors, (6504), 1740 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 6504 transitions. [2021-06-05 16:12:32,301 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 6504 transitions. Word has length 29 [2021-06-05 16:12:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:32,301 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 6504 transitions. [2021-06-05 16:12:32,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-06-05 16:12:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 6504 transitions. [2021-06-05 16:12:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:12:32,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:32,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:32,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 16:12:32,533 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 3 times [2021-06-05 16:12:32,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:32,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786964480] [2021-06-05 16:12:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:32,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:32,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786964480] [2021-06-05 16:12:32,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786964480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:32,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113201969] [2021-06-05 16:12:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:32,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:12:32,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 16:12:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:32,667 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 [2021-06-05 16:12:32,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:32,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:32,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:32,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:10 [2021-06-05 16:12:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:32,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113201969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:32,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:32,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 16:12:32,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504567071] [2021-06-05 16:12:32,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:12:32,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:12:32,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:12:32,714 INFO L87 Difference]: Start difference. First operand 1741 states and 6504 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 16:12:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:32,772 INFO L93 Difference]: Finished difference Result 3028 states and 11382 transitions. [2021-06-05 16:12:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:32,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 [2021-06-05 16:12:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:32,780 INFO L225 Difference]: With dead ends: 3028 [2021-06-05 16:12:32,781 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 16:12:32,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:12:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 16:12:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 1837. [2021-06-05 16:12:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-06-05 16:12:32,830 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-06-05 16:12:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:32,830 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-06-05 16:12:32,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 16:12:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-06-05 16:12:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:12:32,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:32,835 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:33,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:33,053 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -949623576, now seen corresponding path program 4 times [2021-06-05 16:12:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:33,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616548539] [2021-06-05 16:12:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:33,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:33,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616548539] [2021-06-05 16:12:33,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616548539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:33,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50346620] [2021-06-05 16:12:33,118 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 [2021-06-05 16:12:33,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:12:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:12:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:33,192 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 20 treesize of output 14 [2021-06-05 16:12:33,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:33,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:33,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:33,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 16:12:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:33,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50346620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:33,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:33,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 16:12:33,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938848044] [2021-06-05 16:12:33,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:12:33,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:33,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:12:33,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:33,227 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 16:12:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:33,309 INFO L93 Difference]: Finished difference Result 3084 states and 11626 transitions. [2021-06-05 16:12:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 [2021-06-05 16:12:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:33,317 INFO L225 Difference]: With dead ends: 3084 [2021-06-05 16:12:33,317 INFO L226 Difference]: Without dead ends: 3005 [2021-06-05 16:12:33,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-06-05 16:12:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2051. [2021-06-05 16:12:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-06-05 16:12:33,361 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-06-05 16:12:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:33,361 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-06-05 16:12:33,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 16:12:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-06-05 16:12:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:12:33,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:33,367 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:33,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:33,583 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:33,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1467587370, now seen corresponding path program 5 times [2021-06-05 16:12:33,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:33,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866947073] [2021-06-05 16:12:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:33,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866947073] [2021-06-05 16:12:33,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866947073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404521322] [2021-06-05 16:12:33,626 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 [2021-06-05 16:12:33,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:12:33,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:33,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 16:12:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:33,709 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 20 treesize of output 14 [2021-06-05 16:12:33,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:33,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:33,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:33,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 16:12:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:33,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404521322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:33,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:33,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 16:12:33,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505840023] [2021-06-05 16:12:33,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:12:33,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:33,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:12:33,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:33,731 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:33,822 INFO L93 Difference]: Finished difference Result 2912 states and 10948 transitions. [2021-06-05 16:12:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-06-05 16:12:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:33,830 INFO L225 Difference]: With dead ends: 2912 [2021-06-05 16:12:33,830 INFO L226 Difference]: Without dead ends: 2833 [2021-06-05 16:12:33,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-06-05 16:12:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1852. [2021-06-05 16:12:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-06-05 16:12:33,867 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-06-05 16:12:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:33,867 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-06-05 16:12:33,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-06-05 16:12:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:12:33,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:33,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:34,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 16:12:34,085 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:34,086 INFO L82 PathProgramCache]: Analyzing trace with hash -55564736, now seen corresponding path program 6 times [2021-06-05 16:12:34,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:34,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471633806] [2021-06-05 16:12:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:34,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:34,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471633806] [2021-06-05 16:12:34,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471633806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:34,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172665128] [2021-06-05 16:12:34,130 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 [2021-06-05 16:12:34,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:12:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:12:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:34,223 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 18 treesize of output 12 [2021-06-05 16:12:34,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:34,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:34,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:34,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 16:12:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:34,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172665128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:34,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:34,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 16:12:34,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110270344] [2021-06-05 16:12:34,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:12:34,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:12:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:12:34,256 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 16:12:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:34,319 INFO L93 Difference]: Finished difference Result 2793 states and 10453 transitions. [2021-06-05 16:12:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 [2021-06-05 16:12:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:34,326 INFO L225 Difference]: With dead ends: 2793 [2021-06-05 16:12:34,326 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 16:12:34,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:12:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 16:12:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1892. [2021-06-05 16:12:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-06-05 16:12:34,363 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-06-05 16:12:34,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:34,363 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-06-05 16:12:34,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 16:12:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-06-05 16:12:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:12:34,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:34,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:34,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:12:34,581 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash -945078094, now seen corresponding path program 7 times [2021-06-05 16:12:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:34,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135302829] [2021-06-05 16:12:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:34,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:34,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135302829] [2021-06-05 16:12:34,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135302829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:34,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571008506] [2021-06-05 16:12:34,610 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 [2021-06-05 16:12:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:12:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:34,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571008506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:34,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:34,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 16:12:34,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999812926] [2021-06-05 16:12:34,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:12:34,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:34,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:12:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:12:34,682 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:34,735 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-06-05 16:12:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-06-05 16:12:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:34,743 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 16:12:34,743 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 16:12:34,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 16:12:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-06-05 16:12:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-06-05 16:12:34,790 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-06-05 16:12:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:34,791 INFO L482 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-06-05 16:12:34,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-06-05 16:12:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:12:34,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:34,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:35,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 16:12:35,011 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:35,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1385088466, now seen corresponding path program 8 times [2021-06-05 16:12:35,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:35,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673876976] [2021-06-05 16:12:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:35,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673876976] [2021-06-05 16:12:35,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673876976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:35,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111451820] [2021-06-05 16:12:35,039 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 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 [2021-06-05 16:12:35,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:12:35,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:35,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:12:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:35,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111451820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:35,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:35,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 16:12:35,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289272135] [2021-06-05 16:12:35,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:12:35,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:12:35,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:12:35,112 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:35,185 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-06-05 16:12:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:12:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 [2021-06-05 16:12:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:35,198 INFO L225 Difference]: With dead ends: 5257 [2021-06-05 16:12:35,198 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 16:12:35,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:12:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 16:12:35,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-06-05 16:12:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-06-05 16:12:35,273 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-06-05 16:12:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:35,274 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-06-05 16:12:35,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-06-05 16:12:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:35,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:35,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:35,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 16:12:35,498 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:35,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1789712274, now seen corresponding path program 9 times [2021-06-05 16:12:35,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:35,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337500116] [2021-06-05 16:12:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:12:35,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:35,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337500116] [2021-06-05 16:12:35,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337500116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:35,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669297713] [2021-06-05 16:12:35,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:35,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:12:35,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:12:35,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669297713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:35,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:35,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 16:12:35,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366614101] [2021-06-05 16:12:35,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:12:35,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:12:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:12:35,613 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-06-05 16:12:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:35,849 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-06-05 16:12:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:12:35,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 34 [2021-06-05 16:12:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:35,879 INFO L225 Difference]: With dead ends: 16323 [2021-06-05 16:12:35,879 INFO L226 Difference]: Without dead ends: 13965 [2021-06-05 16:12:35,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:12:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-06-05 16:12:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-06-05 16:12:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-06-05 16:12:36,155 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-06-05 16:12:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:36,155 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-06-05 16:12:36,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-06-05 16:12:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-06-05 16:12:36,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:36,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:36,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:36,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 16:12:36,385 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1811384725, now seen corresponding path program 10 times [2021-06-05 16:12:36,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:36,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875441429] [2021-06-05 16:12:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:12:36,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875441429] [2021-06-05 16:12:36,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875441429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929251171] [2021-06-05 16:12:36,437 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 [2021-06-05 16:12:36,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:12:36,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:36,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:36,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:12:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929251171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:36,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:36,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 16:12:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120712843] [2021-06-05 16:12:36,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:12:36,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:12:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:12:36,562 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:36,882 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-06-05 16:12:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:12:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:12:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:36,920 INFO L225 Difference]: With dead ends: 18970 [2021-06-05 16:12:36,920 INFO L226 Difference]: Without dead ends: 18531 [2021-06-05 16:12:36,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:12:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-06-05 16:12:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-06-05 16:12:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-06-05 16:12:37,214 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-06-05 16:12:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:37,214 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-06-05 16:12:37,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-06-05 16:12:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:37,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:37,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:37,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:37,451 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1977044948, now seen corresponding path program 11 times [2021-06-05 16:12:37,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:37,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948063430] [2021-06-05 16:12:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:37,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:37,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948063430] [2021-06-05 16:12:37,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948063430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:37,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281140007] [2021-06-05 16:12:37,535 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 [2021-06-05 16:12:37,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:12:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:37,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:37,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:37,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281140007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:37,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:37,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 16:12:37,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024580223] [2021-06-05 16:12:37,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:12:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:12:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:12:37,674 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-06-05 16:12:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:37,905 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-06-05 16:12:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:12:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2021-06-05 16:12:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:37,947 INFO L225 Difference]: With dead ends: 18432 [2021-06-05 16:12:37,947 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 16:12:37,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:12:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 16:12:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-06-05 16:12:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-06-05 16:12:38,285 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-06-05 16:12:38,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:38,285 INFO L482 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-06-05 16:12:38,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-06-05 16:12:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-06-05 16:12:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:38,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:38,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:38,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:38,519 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-06-05 16:12:38,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:38,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580926671] [2021-06-05 16:12:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:38,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:38,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580926671] [2021-06-05 16:12:38,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580926671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:38,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484213487] [2021-06-05 16:12:38,547 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 [2021-06-05 16:12:38,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:12:38,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:12:38,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484213487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:38,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:38,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 16:12:38,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657899259] [2021-06-05 16:12:38,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:12:38,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:38,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:12:38,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:12:38,644 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-06-05 16:12:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:38,880 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-06-05 16:12:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:12:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2021-06-05 16:12:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:38,990 INFO L225 Difference]: With dead ends: 20371 [2021-06-05 16:12:38,990 INFO L226 Difference]: Without dead ends: 18706 [2021-06-05 16:12:38,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:12:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-06-05 16:12:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-06-05 16:12:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-06-05 16:12:39,368 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-06-05 16:12:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:39,369 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-06-05 16:12:39,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-06-05 16:12:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-06-05 16:12:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:39,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:39,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:39,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 16:12:39,596 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1475484620, now seen corresponding path program 13 times [2021-06-05 16:12:39,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:39,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075633044] [2021-06-05 16:12:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:12:39,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:39,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075633044] [2021-06-05 16:12:39,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075633044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:39,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958614078] [2021-06-05 16:12:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:39,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958614078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:39,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:39,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 16:12:39,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214723264] [2021-06-05 16:12:39,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:12:39,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:39,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:12:39,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:12:39,719 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:40,114 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-06-05 16:12:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:12:40,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:12:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:40,180 INFO L225 Difference]: With dead ends: 29290 [2021-06-05 16:12:40,180 INFO L226 Difference]: Without dead ends: 27668 [2021-06-05 16:12:40,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:12:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-06-05 16:12:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-06-05 16:12:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-06-05 16:12:40,640 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-06-05 16:12:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:40,641 INFO L482 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-06-05 16:12:40,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-06-05 16:12:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:40,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:40,672 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:40,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:40,873 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1888062838, now seen corresponding path program 14 times [2021-06-05 16:12:40,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:40,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301852076] [2021-06-05 16:12:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:12:40,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:40,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301852076] [2021-06-05 16:12:40,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301852076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:40,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777758584] [2021-06-05 16:12:40,894 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 [2021-06-05 16:12:40,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:12:40,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:41,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777758584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:41,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:41,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 16:12:41,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706672273] [2021-06-05 16:12:41,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:12:41,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:12:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:12:41,007 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-06-05 16:12:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:41,387 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-06-05 16:12:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:12:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2021-06-05 16:12:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:41,448 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 16:12:41,448 INFO L226 Difference]: Without dead ends: 26976 [2021-06-05 16:12:41,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:12:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-06-05 16:12:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-06-05 16:12:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-06-05 16:12:41,957 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-06-05 16:12:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:41,958 INFO L482 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-06-05 16:12:41,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-06-05 16:12:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-06-05 16:12:41,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:41,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:41,991 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:42,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:12:42,206 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2054889942, now seen corresponding path program 15 times [2021-06-05 16:12:42,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:42,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941925594] [2021-06-05 16:12:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:42,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:42,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941925594] [2021-06-05 16:12:42,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941925594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:42,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349953931] [2021-06-05 16:12:42,226 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:42,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:12:42,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:42,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:42,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:12:42,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349953931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:42,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:42,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 16:12:42,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520554902] [2021-06-05 16:12:42,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:12:42,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:12:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:12:42,338 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:42,709 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-06-05 16:12:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:12:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:12:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:42,788 INFO L225 Difference]: With dead ends: 30228 [2021-06-05 16:12:42,789 INFO L226 Difference]: Without dead ends: 30070 [2021-06-05 16:12:42,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:12:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-06-05 16:12:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-06-05 16:12:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-06-05 16:12:43,344 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-06-05 16:12:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:43,344 INFO L482 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-06-05 16:12:43,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-06-05 16:12:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:12:43,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:43,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:43,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 16:12:43,596 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2024685389, now seen corresponding path program 16 times [2021-06-05 16:12:43,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:43,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799198687] [2021-06-05 16:12:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:12:43,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:43,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799198687] [2021-06-05 16:12:43,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799198687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:43,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903575647] [2021-06-05 16:12:43,613 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 [2021-06-05 16:12:43,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:12:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:12:43,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:12:43,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903575647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:43,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:43,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 16:12:43,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894106069] [2021-06-05 16:12:43,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:12:43,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:12:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:12:43,703 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:43,981 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-06-05 16:12:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:12:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:12:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:44,049 INFO L225 Difference]: With dead ends: 28338 [2021-06-05 16:12:44,050 INFO L226 Difference]: Without dead ends: 28230 [2021-06-05 16:12:44,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:12:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-06-05 16:12:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-06-05 16:12:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-06-05 16:12:44,709 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-06-05 16:12:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:44,709 INFO L482 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-06-05 16:12:44,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-06-05 16:12:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:12:44,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:44,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:44,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 16:12:44,946 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash 31444491, now seen corresponding path program 17 times [2021-06-05 16:12:44,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:44,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777327044] [2021-06-05 16:12:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:12:44,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777327044] [2021-06-05 16:12:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777327044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453089133] [2021-06-05 16:12:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:12:44,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:12:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:44,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:12:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:12:45,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453089133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:45,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:45,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 16:12:45,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597948695] [2021-06-05 16:12:45,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:12:45,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:45,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:12:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:12:45,036 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:45,177 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-06-05 16:12:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:12:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2021-06-05 16:12:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:45,250 INFO L225 Difference]: With dead ends: 29898 [2021-06-05 16:12:45,250 INFO L226 Difference]: Without dead ends: 29898 [2021-06-05 16:12:45,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:12:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-06-05 16:12:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-06-05 16:12:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-06-05 16:12:45,858 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-06-05 16:12:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:45,858 INFO L482 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-06-05 16:12:45,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-06-05 16:12:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:12:45,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:45,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:46,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 16:12:46,098 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash -906169461, now seen corresponding path program 18 times [2021-06-05 16:12:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:46,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13732313] [2021-06-05 16:12:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:12:46,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:46,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13732313] [2021-06-05 16:12:46,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13732313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843414369] [2021-06-05 16:12:46,121 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 [2021-06-05 16:12:46,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:12:46,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:46,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:12:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:12:46,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843414369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:46,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:46,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 16:12:46,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099666072] [2021-06-05 16:12:46,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:12:46,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:46,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:12:46,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:12:46,191 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:46,542 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-06-05 16:12:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:12:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-06-05 16:12:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:46,636 INFO L225 Difference]: With dead ends: 37062 [2021-06-05 16:12:46,636 INFO L226 Difference]: Without dead ends: 37062 [2021-06-05 16:12:46,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:12:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-06-05 16:12:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-06-05 16:12:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-06-05 16:12:47,335 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-06-05 16:12:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:47,335 INFO L482 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-06-05 16:12:47,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:47,335 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-06-05 16:12:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:12:47,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:47,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:47,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:12:47,597 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:47,598 INFO L82 PathProgramCache]: Analyzing trace with hash -774251319, now seen corresponding path program 19 times [2021-06-05 16:12:47,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:47,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624174425] [2021-06-05 16:12:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:47,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:47,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624174425] [2021-06-05 16:12:47,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624174425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:47,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795350036] [2021-06-05 16:12:47,741 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:47,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:12:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:47,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:12:47,861 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 35 treesize of output 17 [2021-06-05 16:12:47,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:47,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:47,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:47,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 16:12:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:12:48,011 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 50 treesize of output 14 [2021-06-05 16:12:48,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:48,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:48,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:48,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:12:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:48,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795350036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:48,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:48,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:12:48,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934834478] [2021-06-05 16:12:48,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:12:48,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:48,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:12:48,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:12:48,033 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:48,754 INFO L93 Difference]: Finished difference Result 52372 states and 217820 transitions. [2021-06-05 16:12:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:12:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:12:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:48,904 INFO L225 Difference]: With dead ends: 52372 [2021-06-05 16:12:48,905 INFO L226 Difference]: Without dead ends: 52317 [2021-06-05 16:12:48,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:12:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52317 states. [2021-06-05 16:12:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52317 to 36002. [2021-06-05 16:12:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36002 states, 36001 states have (on average 4.139857226188162) internal successors, (149039), 36001 states have internal predecessors, (149039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36002 states to 36002 states and 149039 transitions. [2021-06-05 16:12:50,135 INFO L78 Accepts]: Start accepts. Automaton has 36002 states and 149039 transitions. Word has length 39 [2021-06-05 16:12:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:50,135 INFO L482 AbstractCegarLoop]: Abstraction has 36002 states and 149039 transitions. [2021-06-05 16:12:50,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 36002 states and 149039 transitions. [2021-06-05 16:12:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:12:50,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:50,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:50,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:50,437 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1160268155, now seen corresponding path program 20 times [2021-06-05 16:12:50,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:50,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376849761] [2021-06-05 16:12:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:50,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376849761] [2021-06-05 16:12:50,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376849761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793054836] [2021-06-05 16:12:50,594 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 [2021-06-05 16:12:50,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:12:50,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:12:50,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:50,708 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:12:50,708 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 35 treesize of output 17 [2021-06-05 16:12:50,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:50,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:50,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:50,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 16:12:50,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:12:50,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:50,776 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 50 treesize of output 14 [2021-06-05 16:12:50,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:50,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:50,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:50,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:12:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:50,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793054836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:50,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:50,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:12:50,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041472616] [2021-06-05 16:12:50,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:12:50,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:50,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:12:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:12:50,802 INFO L87 Difference]: Start difference. First operand 36002 states and 149039 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:51,283 INFO L93 Difference]: Finished difference Result 55018 states and 227376 transitions. [2021-06-05 16:12:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:12:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:12:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:51,642 INFO L225 Difference]: With dead ends: 55018 [2021-06-05 16:12:51,643 INFO L226 Difference]: Without dead ends: 54826 [2021-06-05 16:12:51,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:12:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54826 states. [2021-06-05 16:12:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54826 to 36137. [2021-06-05 16:12:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36137 states, 36136 states have (on average 4.141825326544167) internal successors, (149669), 36136 states have internal predecessors, (149669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36137 states to 36137 states and 149669 transitions. [2021-06-05 16:12:52,525 INFO L78 Accepts]: Start accepts. Automaton has 36137 states and 149669 transitions. Word has length 39 [2021-06-05 16:12:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:52,525 INFO L482 AbstractCegarLoop]: Abstraction has 36137 states and 149669 transitions. [2021-06-05 16:12:52,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36137 states and 149669 transitions. [2021-06-05 16:12:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:12:52,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:52,586 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:52,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 16:12:52,787 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1833798575, now seen corresponding path program 21 times [2021-06-05 16:12:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:52,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173007586] [2021-06-05 16:12:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:52,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:52,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173007586] [2021-06-05 16:12:52,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173007586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:52,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029847666] [2021-06-05 16:12:52,911 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 [2021-06-05 16:12:52,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:12:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:12:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:53,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:53,107 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 50 [2021-06-05 16:12:53,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:53,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:53,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:53,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:55 [2021-06-05 16:12:53,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:53,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:53,248 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-06-05 16:12:53,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:12:53,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:53,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:12:53,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-06-05 16:12:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:53,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029847666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:53,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:53,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:12:53,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311643902] [2021-06-05 16:12:53,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:12:53,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:12:53,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:12:53,306 INFO L87 Difference]: Start difference. First operand 36137 states and 149669 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:12:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:54,284 INFO L93 Difference]: Finished difference Result 62535 states and 260138 transitions. [2021-06-05 16:12:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:12:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:12:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:54,476 INFO L225 Difference]: With dead ends: 62535 [2021-06-05 16:12:54,476 INFO L226 Difference]: Without dead ends: 62480 [2021-06-05 16:12:54,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:12:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62480 states. [2021-06-05 16:12:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62480 to 36705. [2021-06-05 16:12:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36705 states, 36704 states have (on average 4.144861595466434) internal successors, (152133), 36704 states have internal predecessors, (152133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36705 states to 36705 states and 152133 transitions. [2021-06-05 16:12:55,540 INFO L78 Accepts]: Start accepts. Automaton has 36705 states and 152133 transitions. Word has length 39 [2021-06-05 16:12:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:55,540 INFO L482 AbstractCegarLoop]: Abstraction has 36705 states and 152133 transitions. [2021-06-05 16:12:55,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:12:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 36705 states and 152133 transitions. [2021-06-05 16:12:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:12:55,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:55,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:55,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:55,805 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1196210545, now seen corresponding path program 22 times [2021-06-05 16:12:55,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:55,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171578354] [2021-06-05 16:12:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:55,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:55,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171578354] [2021-06-05 16:12:55,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171578354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:55,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636136492] [2021-06-05 16:12:55,923 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 [2021-06-05 16:12:55,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:12:55,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:12:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:56,368 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:12:56,368 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 57 treesize of output 39 [2021-06-05 16:12:56,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:56,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:56,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:12:56,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:12:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:12:56,455 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 50 treesize of output 14 [2021-06-05 16:12:56,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:56,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:56,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:12:56,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:12:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:56,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636136492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:56,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:56,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:12:56,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51570011] [2021-06-05 16:12:56,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:12:56,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:12:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:12:56,482 INFO L87 Difference]: Start difference. First operand 36705 states and 152133 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:12:57,098 INFO L93 Difference]: Finished difference Result 64685 states and 269486 transitions. [2021-06-05 16:12:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:12:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:12:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:12:57,279 INFO L225 Difference]: With dead ends: 64685 [2021-06-05 16:12:57,279 INFO L226 Difference]: Without dead ends: 64630 [2021-06-05 16:12:57,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:12:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-06-05 16:12:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 36953. [2021-06-05 16:12:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36953 states, 36952 states have (on average 4.146595583459623) internal successors, (153225), 36952 states have internal predecessors, (153225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36953 states to 36953 states and 153225 transitions. [2021-06-05 16:12:58,291 INFO L78 Accepts]: Start accepts. Automaton has 36953 states and 153225 transitions. Word has length 39 [2021-06-05 16:12:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:12:58,291 INFO L482 AbstractCegarLoop]: Abstraction has 36953 states and 153225 transitions. [2021-06-05 16:12:58,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:12:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 36953 states and 153225 transitions. [2021-06-05 16:12:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:12:58,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:12:58,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:12:58,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 16:12:58,780 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:12:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:12:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1679763727, now seen corresponding path program 23 times [2021-06-05 16:12:58,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:12:58,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805617875] [2021-06-05 16:12:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:12:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:12:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:58,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:12:58,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805617875] [2021-06-05 16:12:58,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805617875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:58,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128844038] [2021-06-05 16:12:58,911 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:12:58,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:12:58,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:12:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:12:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:12:59,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:12:59,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:12:59,215 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 47 treesize of output 35 [2021-06-05 16:12:59,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:12:59,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:59,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:12:59,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:36 [2021-06-05 16:12:59,278 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:12:59,278 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 44 treesize of output 40 [2021-06-05 16:12:59,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:12:59,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:12:59,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:12:59,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 16:12:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:12:59,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128844038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:12:59,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:12:59,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:12:59,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072595110] [2021-06-05 16:12:59,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:12:59,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:12:59,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:12:59,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:12:59,344 INFO L87 Difference]: Start difference. First operand 36953 states and 153225 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:13:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:01,080 INFO L93 Difference]: Finished difference Result 100889 states and 419088 transitions. [2021-06-05 16:13:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:13:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:13:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:01,384 INFO L225 Difference]: With dead ends: 100889 [2021-06-05 16:13:01,384 INFO L226 Difference]: Without dead ends: 100543 [2021-06-05 16:13:01,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:13:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100543 states. [2021-06-05 16:13:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100543 to 41321. [2021-06-05 16:13:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41321 states, 41320 states have (on average 4.165488867376573) internal successors, (172118), 41320 states have internal predecessors, (172118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41321 states to 41321 states and 172118 transitions. [2021-06-05 16:13:02,720 INFO L78 Accepts]: Start accepts. Automaton has 41321 states and 172118 transitions. Word has length 39 [2021-06-05 16:13:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:02,720 INFO L482 AbstractCegarLoop]: Abstraction has 41321 states and 172118 transitions. [2021-06-05 16:13:02,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:13:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 41321 states and 172118 transitions. [2021-06-05 16:13:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:03,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:03,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:03,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 16:13:03,322 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash -202749415, now seen corresponding path program 24 times [2021-06-05 16:13:03,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:03,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804547196] [2021-06-05 16:13:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:03,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804547196] [2021-06-05 16:13:03,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804547196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316315179] [2021-06-05 16:13:03,459 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 [2021-06-05 16:13:03,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:13:03,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:13:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:03,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:03,603 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 41 treesize of output 23 [2021-06-05 16:13:03,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:03,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:03,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:03,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:34 [2021-06-05 16:13:03,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:03,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:03,694 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-06-05 16:13:03,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:03,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:03,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:13:03,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:21 [2021-06-05 16:13:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:03,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316315179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:03,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:03,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:13:03,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558733810] [2021-06-05 16:13:03,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:13:03,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:13:03,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:13:03,761 INFO L87 Difference]: Start difference. First operand 41321 states and 172118 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:04,992 INFO L93 Difference]: Finished difference Result 82777 states and 344914 transitions. [2021-06-05 16:13:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:13:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:13:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:05,272 INFO L225 Difference]: With dead ends: 82777 [2021-06-05 16:13:05,272 INFO L226 Difference]: Without dead ends: 82585 [2021-06-05 16:13:05,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:13:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82585 states. [2021-06-05 16:13:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82585 to 41297. [2021-06-05 16:13:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41297 states, 41296 states have (on average 4.166069352963968) internal successors, (172042), 41296 states have internal predecessors, (172042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41297 states to 41297 states and 172042 transitions. [2021-06-05 16:13:06,595 INFO L78 Accepts]: Start accepts. Automaton has 41297 states and 172042 transitions. Word has length 39 [2021-06-05 16:13:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:06,595 INFO L482 AbstractCegarLoop]: Abstraction has 41297 states and 172042 transitions. [2021-06-05 16:13:06,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 41297 states and 172042 transitions. [2021-06-05 16:13:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:06,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:06,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:06,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 16:13:06,885 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash 140092723, now seen corresponding path program 25 times [2021-06-05 16:13:06,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:06,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456969176] [2021-06-05 16:13:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:07,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:07,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456969176] [2021-06-05 16:13:07,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456969176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:07,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726290302] [2021-06-05 16:13:07,012 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 [2021-06-05 16:13:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:07,158 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:07,159 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 47 treesize of output 29 [2021-06-05 16:13:07,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:07,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:07,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:07,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:42 [2021-06-05 16:13:07,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:07,268 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 50 treesize of output 14 [2021-06-05 16:13:07,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:07,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:07,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:07,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:13:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:07,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726290302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:07,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:07,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:13:07,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123329214] [2021-06-05 16:13:07,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:13:07,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:13:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:07,290 INFO L87 Difference]: Start difference. First operand 41297 states and 172042 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:13:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:08,113 INFO L93 Difference]: Finished difference Result 60619 states and 253499 transitions. [2021-06-05 16:13:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:13:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-06-05 16:13:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:08,286 INFO L225 Difference]: With dead ends: 60619 [2021-06-05 16:13:08,286 INFO L226 Difference]: Without dead ends: 60564 [2021-06-05 16:13:08,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60564 states. [2021-06-05 16:13:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60564 to 43242. [2021-06-05 16:13:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43242 states, 43241 states have (on average 4.165791725445757) internal successors, (180133), 43241 states have internal predecessors, (180133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43242 states to 43242 states and 180133 transitions. [2021-06-05 16:13:09,387 INFO L78 Accepts]: Start accepts. Automaton has 43242 states and 180133 transitions. Word has length 39 [2021-06-05 16:13:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:09,388 INFO L482 AbstractCegarLoop]: Abstraction has 43242 states and 180133 transitions. [2021-06-05 16:13:09,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:13:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 43242 states and 180133 transitions. [2021-06-05 16:13:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:09,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:09,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:09,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:13:09,669 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:09,669 INFO L82 PathProgramCache]: Analyzing trace with hash -497495307, now seen corresponding path program 26 times [2021-06-05 16:13:09,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:09,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397317280] [2021-06-05 16:13:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:09,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:09,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397317280] [2021-06-05 16:13:09,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397317280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:09,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387626417] [2021-06-05 16:13:09,781 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 [2021-06-05 16:13:09,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:13:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:09,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:13:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:09,940 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:09,940 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 53 treesize of output 35 [2021-06-05 16:13:09,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:09,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:09,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:09,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2021-06-05 16:13:09,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:10,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:10,004 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:13:10,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:10,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:10,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:10,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:18 [2021-06-05 16:13:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:10,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387626417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:10,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:10,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 16:13:10,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717489171] [2021-06-05 16:13:10,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:13:10,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:13:10,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:13:10,058 INFO L87 Difference]: Start difference. First operand 43242 states and 180133 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:11,183 INFO L93 Difference]: Finished difference Result 77890 states and 325361 transitions. [2021-06-05 16:13:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:13:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:13:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:11,424 INFO L225 Difference]: With dead ends: 77890 [2021-06-05 16:13:11,425 INFO L226 Difference]: Without dead ends: 77835 [2021-06-05 16:13:11,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:13:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77835 states. [2021-06-05 16:13:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77835 to 43506. [2021-06-05 16:13:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43506 states, 43505 states have (on average 4.1671761866452135) internal successors, (181293), 43505 states have internal predecessors, (181293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43506 states to 43506 states and 181293 transitions. [2021-06-05 16:13:12,690 INFO L78 Accepts]: Start accepts. Automaton has 43506 states and 181293 transitions. Word has length 39 [2021-06-05 16:13:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:12,690 INFO L482 AbstractCegarLoop]: Abstraction has 43506 states and 181293 transitions. [2021-06-05 16:13:12,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 43506 states and 181293 transitions. [2021-06-05 16:13:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:12,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:12,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:12,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:13:12,966 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash 921497717, now seen corresponding path program 27 times [2021-06-05 16:13:12,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:12,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097131142] [2021-06-05 16:13:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:13,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:13,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097131142] [2021-06-05 16:13:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097131142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:13,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744907983] [2021-06-05 16:13:13,068 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 [2021-06-05 16:13:13,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:13:13,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:13,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:13:13,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:13,551 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:13:13,551 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 49 treesize of output 53 [2021-06-05 16:13:13,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:13,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:13,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:13,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:46 [2021-06-05 16:13:13,660 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:13:13,661 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 44 treesize of output 40 [2021-06-05 16:13:13,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:13,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:13,670 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 9 treesize of output 3 [2021-06-05 16:13:13,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:13,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:13,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:13,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:36 [2021-06-05 16:13:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:13,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744907983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:13,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:13,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:13:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716898383] [2021-06-05 16:13:13,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:13:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:13,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:13:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:13:13,758 INFO L87 Difference]: Start difference. First operand 43506 states and 181293 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:13:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:15,810 INFO L93 Difference]: Finished difference Result 138509 states and 583861 transitions. [2021-06-05 16:13:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:13:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 16:13:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:16,262 INFO L225 Difference]: With dead ends: 138509 [2021-06-05 16:13:16,262 INFO L226 Difference]: Without dead ends: 138399 [2021-06-05 16:13:16,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 946.3ms TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:13:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138399 states. [2021-06-05 16:13:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138399 to 46637. [2021-06-05 16:13:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46637 states, 46636 states have (on average 4.1785316064842615) internal successors, (194870), 46636 states have internal predecessors, (194870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46637 states to 46637 states and 194870 transitions. [2021-06-05 16:13:18,514 INFO L78 Accepts]: Start accepts. Automaton has 46637 states and 194870 transitions. Word has length 39 [2021-06-05 16:13:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:18,515 INFO L482 AbstractCegarLoop]: Abstraction has 46637 states and 194870 transitions. [2021-06-05 16:13:18,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:13:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 46637 states and 194870 transitions. [2021-06-05 16:13:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:18,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:18,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:18,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:18,807 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1615119669, now seen corresponding path program 28 times [2021-06-05 16:13:18,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:18,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457815074] [2021-06-05 16:13:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:18,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457815074] [2021-06-05 16:13:18,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457815074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988068434] [2021-06-05 16:13:18,915 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 [2021-06-05 16:13:18,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:13:18,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:18,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:18,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:19,123 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:19,124 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 57 treesize of output 39 [2021-06-05 16:13:19,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:19,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:19,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:19,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:13:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:19,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:19,186 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 50 treesize of output 14 [2021-06-05 16:13:19,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:19,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:19,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:19,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:13:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:19,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988068434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:19,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:19,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:13:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429016861] [2021-06-05 16:13:19,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:13:19,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:13:19,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:19,206 INFO L87 Difference]: Start difference. First operand 46637 states and 194870 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:13:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:20,053 INFO L93 Difference]: Finished difference Result 72544 states and 303851 transitions. [2021-06-05 16:13:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:13:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-06-05 16:13:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:20,286 INFO L225 Difference]: With dead ends: 72544 [2021-06-05 16:13:20,286 INFO L226 Difference]: Without dead ends: 72489 [2021-06-05 16:13:20,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:13:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72489 states. [2021-06-05 16:13:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72489 to 47265. [2021-06-05 16:13:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47265 states, 47264 states have (on average 4.180814150304672) internal successors, (197602), 47264 states have internal predecessors, (197602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47265 states to 47265 states and 197602 transitions. [2021-06-05 16:13:21,502 INFO L78 Accepts]: Start accepts. Automaton has 47265 states and 197602 transitions. Word has length 39 [2021-06-05 16:13:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:21,502 INFO L482 AbstractCegarLoop]: Abstraction has 47265 states and 197602 transitions. [2021-06-05 16:13:21,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:13:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 47265 states and 197602 transitions. [2021-06-05 16:13:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:21,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:21,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:21,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:13:21,783 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1260854603, now seen corresponding path program 29 times [2021-06-05 16:13:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:21,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299445900] [2021-06-05 16:13:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:21,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:21,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299445900] [2021-06-05 16:13:21,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299445900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:21,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929690843] [2021-06-05 16:13:21,880 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 [2021-06-05 16:13:21,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:13:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:13:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:22,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:22,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:22,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 16:13:22,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:22,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:22,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:22,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:23 [2021-06-05 16:13:22,171 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:13:22,171 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 27 treesize of output 31 [2021-06-05 16:13:22,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:22,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:22,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:22,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:19 [2021-06-05 16:13:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929690843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:22,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:22,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:13:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193708550] [2021-06-05 16:13:22,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:13:22,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:22,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:13:22,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:13:22,217 INFO L87 Difference]: Start difference. First operand 47265 states and 197602 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:13:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:24,006 INFO L93 Difference]: Finished difference Result 86122 states and 360879 transitions. [2021-06-05 16:13:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:13:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 16:13:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:24,263 INFO L225 Difference]: With dead ends: 86122 [2021-06-05 16:13:24,263 INFO L226 Difference]: Without dead ends: 86012 [2021-06-05 16:13:24,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:13:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86012 states. [2021-06-05 16:13:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86012 to 48549. [2021-06-05 16:13:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48549 states, 48548 states have (on average 4.18571310867595) internal successors, (203208), 48548 states have internal predecessors, (203208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48549 states to 48549 states and 203208 transitions. [2021-06-05 16:13:25,661 INFO L78 Accepts]: Start accepts. Automaton has 48549 states and 203208 transitions. Word has length 39 [2021-06-05 16:13:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:25,661 INFO L482 AbstractCegarLoop]: Abstraction has 48549 states and 203208 transitions. [2021-06-05 16:13:25,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:13:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 48549 states and 203208 transitions. [2021-06-05 16:13:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:26,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:26,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:26,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 16:13:26,293 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -595147851, now seen corresponding path program 30 times [2021-06-05 16:13:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:26,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090518334] [2021-06-05 16:13:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:26,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:26,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090518334] [2021-06-05 16:13:26,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090518334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:26,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816638799] [2021-06-05 16:13:26,400 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 [2021-06-05 16:13:26,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:13:26,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:13:26,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:26,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:26,563 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 43 treesize of output 25 [2021-06-05 16:13:26,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:26,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:26,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:26,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:28 [2021-06-05 16:13:26,608 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:26,608 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 32 treesize of output 14 [2021-06-05 16:13:26,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:26,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:26,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:26,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:13:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:26,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816638799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:26,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:26,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:13:26,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716222601] [2021-06-05 16:13:26,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:13:26,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:13:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:26,632 INFO L87 Difference]: Start difference. First operand 48549 states and 203208 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:27,176 INFO L93 Difference]: Finished difference Result 65882 states and 276111 transitions. [2021-06-05 16:13:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:13:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:13:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:27,366 INFO L225 Difference]: With dead ends: 65882 [2021-06-05 16:13:27,367 INFO L226 Difference]: Without dead ends: 65827 [2021-06-05 16:13:27,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65827 states. [2021-06-05 16:13:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65827 to 48843. [2021-06-05 16:13:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48843 states, 48842 states have (on average 4.18611031489292) internal successors, (204458), 48842 states have internal predecessors, (204458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48843 states to 48843 states and 204458 transitions. [2021-06-05 16:13:28,621 INFO L78 Accepts]: Start accepts. Automaton has 48843 states and 204458 transitions. Word has length 39 [2021-06-05 16:13:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:28,621 INFO L482 AbstractCegarLoop]: Abstraction has 48843 states and 204458 transitions. [2021-06-05 16:13:28,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 48843 states and 204458 transitions. [2021-06-05 16:13:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:28,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:28,959 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:29,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:29,173 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1810207527, now seen corresponding path program 31 times [2021-06-05 16:13:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:29,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282260754] [2021-06-05 16:13:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:29,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282260754] [2021-06-05 16:13:29,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282260754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654219263] [2021-06-05 16:13:29,335 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 [2021-06-05 16:13:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:29,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:29,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:29,471 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 45 treesize of output 27 [2021-06-05 16:13:29,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:29,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:29,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:29,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:38 [2021-06-05 16:13:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:29,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:29,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:29,537 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 50 treesize of output 14 [2021-06-05 16:13:29,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:29,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:29,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:29,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:13:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654219263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:29,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:29,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:13:29,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134623367] [2021-06-05 16:13:29,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:13:29,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:29,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:13:29,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:29,570 INFO L87 Difference]: Start difference. First operand 48843 states and 204458 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) [2021-06-05 16:13:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:30,194 INFO L93 Difference]: Finished difference Result 68376 states and 284820 transitions. [2021-06-05 16:13:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:13:30,195 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 39 [2021-06-05 16:13:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:30,382 INFO L225 Difference]: With dead ends: 68376 [2021-06-05 16:13:30,382 INFO L226 Difference]: Without dead ends: 68184 [2021-06-05 16:13:30,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68184 states. [2021-06-05 16:13:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68184 to 49079. [2021-06-05 16:13:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49079 states, 49078 states have (on average 4.183137047149436) internal successors, (205300), 49078 states have internal predecessors, (205300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49079 states to 49079 states and 205300 transitions. [2021-06-05 16:13:31,608 INFO L78 Accepts]: Start accepts. Automaton has 49079 states and 205300 transitions. Word has length 39 [2021-06-05 16:13:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:31,609 INFO L482 AbstractCegarLoop]: Abstraction has 49079 states and 205300 transitions. [2021-06-05 16:13:31,609 INFO L483 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) [2021-06-05 16:13:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 49079 states and 205300 transitions. [2021-06-05 16:13:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:31,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:31,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:31,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 16:13:31,901 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1888715435, now seen corresponding path program 32 times [2021-06-05 16:13:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:31,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889850363] [2021-06-05 16:13:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:32,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:32,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889850363] [2021-06-05 16:13:32,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889850363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:32,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831971603] [2021-06-05 16:13:32,287 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) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:32,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:13:32,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:32,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:32,451 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:32,452 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 57 treesize of output 39 [2021-06-05 16:13:32,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:32,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:32,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:32,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:13:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:32,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:32,498 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 50 treesize of output 14 [2021-06-05 16:13:32,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:32,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:32,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:32,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:13:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:32,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831971603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:32,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:32,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:13:32,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132475263] [2021-06-05 16:13:32,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:13:32,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:13:32,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:32,529 INFO L87 Difference]: Start difference. First operand 49079 states and 205300 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) [2021-06-05 16:13:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:33,219 INFO L93 Difference]: Finished difference Result 71248 states and 297588 transitions. [2021-06-05 16:13:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:13:33,220 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 39 [2021-06-05 16:13:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:33,429 INFO L225 Difference]: With dead ends: 71248 [2021-06-05 16:13:33,429 INFO L226 Difference]: Without dead ends: 71088 [2021-06-05 16:13:33,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:13:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71088 states. [2021-06-05 16:13:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71088 to 49239. [2021-06-05 16:13:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49239 states, 49238 states have (on average 4.1832730817661155) internal successors, (205976), 49238 states have internal predecessors, (205976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49239 states to 49239 states and 205976 transitions. [2021-06-05 16:13:34,764 INFO L78 Accepts]: Start accepts. Automaton has 49239 states and 205976 transitions. Word has length 39 [2021-06-05 16:13:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:34,764 INFO L482 AbstractCegarLoop]: Abstraction has 49239 states and 205976 transitions. [2021-06-05 16:13:34,764 INFO L483 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) [2021-06-05 16:13:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 49239 states and 205976 transitions. [2021-06-05 16:13:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:35,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:35,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:35,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:35,305 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash 410799271, now seen corresponding path program 33 times [2021-06-05 16:13:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:35,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116301822] [2021-06-05 16:13:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:35,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:35,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116301822] [2021-06-05 16:13:35,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116301822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:35,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200779464] [2021-06-05 16:13:35,462 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 [2021-06-05 16:13:35,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:13:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:13:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:35,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:35,684 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-06-05 16:13:35,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:35,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:35,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:35,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:58 [2021-06-05 16:13:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 16:13:35,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:35,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:35,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:35,795 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:13:35,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:35,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:35,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:35,827 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:96, output treesize:34 [2021-06-05 16:13:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:35,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200779464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:35,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:35,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:13:35,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130081218] [2021-06-05 16:13:35,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:13:35,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:13:35,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:13:35,898 INFO L87 Difference]: Start difference. First operand 49239 states and 205976 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-06-05 16:13:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:37,814 INFO L93 Difference]: Finished difference Result 97636 states and 405510 transitions. [2021-06-05 16:13:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:13:37,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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 39 [2021-06-05 16:13:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:38,089 INFO L225 Difference]: With dead ends: 97636 [2021-06-05 16:13:38,089 INFO L226 Difference]: Without dead ends: 97472 [2021-06-05 16:13:38,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1093.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1019, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:13:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97472 states. [2021-06-05 16:13:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97472 to 49475. [2021-06-05 16:13:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49475 states, 49474 states have (on average 4.184986053280511) internal successors, (207048), 49474 states have internal predecessors, (207048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49475 states to 49475 states and 207048 transitions. [2021-06-05 16:13:39,524 INFO L78 Accepts]: Start accepts. Automaton has 49475 states and 207048 transitions. Word has length 39 [2021-06-05 16:13:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:39,524 INFO L482 AbstractCegarLoop]: Abstraction has 49475 states and 207048 transitions. [2021-06-05 16:13:39,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-06-05 16:13:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 49475 states and 207048 transitions. [2021-06-05 16:13:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:39,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:39,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:39,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:13:39,828 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:39,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1378365419, now seen corresponding path program 34 times [2021-06-05 16:13:39,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:39,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879364350] [2021-06-05 16:13:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:39,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:39,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879364350] [2021-06-05 16:13:39,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879364350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:39,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512709638] [2021-06-05 16:13:39,955 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 [2021-06-05 16:13:39,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:13:39,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:40,118 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:40,118 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 57 treesize of output 39 [2021-06-05 16:13:40,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:40,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:40,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:13:40,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:13:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:40,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:40,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:40,175 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 50 treesize of output 14 [2021-06-05 16:13:40,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:40,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:40,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:40,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:13:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:40,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512709638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:40,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:40,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:13:40,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784049408] [2021-06-05 16:13:40,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:13:40,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:40,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:13:40,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:13:40,203 INFO L87 Difference]: Start difference. First operand 49475 states and 207048 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) [2021-06-05 16:13:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:41,257 INFO L93 Difference]: Finished difference Result 73622 states and 307761 transitions. [2021-06-05 16:13:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:13:41,257 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 39 [2021-06-05 16:13:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:41,459 INFO L225 Difference]: With dead ends: 73622 [2021-06-05 16:13:41,459 INFO L226 Difference]: Without dead ends: 73462 [2021-06-05 16:13:41,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:13:41,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73462 states. [2021-06-05 16:13:42,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73462 to 49315. [2021-06-05 16:13:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49315 states, 49314 states have (on average 4.184856227440483) internal successors, (206372), 49314 states have internal predecessors, (206372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49315 states to 49315 states and 206372 transitions. [2021-06-05 16:13:42,783 INFO L78 Accepts]: Start accepts. Automaton has 49315 states and 206372 transitions. Word has length 39 [2021-06-05 16:13:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:42,783 INFO L482 AbstractCegarLoop]: Abstraction has 49315 states and 206372 transitions. [2021-06-05 16:13:42,783 INFO L483 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) [2021-06-05 16:13:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 49315 states and 206372 transitions. [2021-06-05 16:13:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:42,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:42,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:43,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 16:13:43,081 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash -388199381, now seen corresponding path program 35 times [2021-06-05 16:13:43,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:43,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134628764] [2021-06-05 16:13:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:43,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:43,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134628764] [2021-06-05 16:13:43,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134628764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:43,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983879486] [2021-06-05 16:13:43,207 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 [2021-06-05 16:13:43,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:13:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:43,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:43,398 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-06-05 16:13:43,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:43,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:43,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:43,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:33 [2021-06-05 16:13:43,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 16:13:43,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:43,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:43,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:43,781 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 16:13:43,795 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:43,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:43,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:43,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:33 [2021-06-05 16:13:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:43,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983879486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:43,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:43,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:13:43,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853522739] [2021-06-05 16:13:43,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:13:43,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:13:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:13:43,883 INFO L87 Difference]: Start difference. First operand 49315 states and 206372 transitions. Second operand has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 20 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) [2021-06-05 16:13:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:46,149 INFO L93 Difference]: Finished difference Result 122187 states and 509230 transitions. [2021-06-05 16:13:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:13:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 20 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 39 [2021-06-05 16:13:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:46,544 INFO L225 Difference]: With dead ends: 122187 [2021-06-05 16:13:46,544 INFO L226 Difference]: Without dead ends: 121878 [2021-06-05 16:13:46,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1135.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:13:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121878 states. [2021-06-05 16:13:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121878 to 51630. [2021-06-05 16:13:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51630 states, 51629 states have (on average 4.188982935946852) internal successors, (216273), 51629 states have internal predecessors, (216273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51630 states to 51630 states and 216273 transitions. [2021-06-05 16:13:48,342 INFO L78 Accepts]: Start accepts. Automaton has 51630 states and 216273 transitions. Word has length 39 [2021-06-05 16:13:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:48,342 INFO L482 AbstractCegarLoop]: Abstraction has 51630 states and 216273 transitions. [2021-06-05 16:13:48,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 20 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) [2021-06-05 16:13:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 51630 states and 216273 transitions. [2021-06-05 16:13:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:48,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:48,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:49,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:49,009 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 36 times [2021-06-05 16:13:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:49,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507890454] [2021-06-05 16:13:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:49,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:49,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507890454] [2021-06-05 16:13:49,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507890454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87685508] [2021-06-05 16:13:49,109 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:49,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:13:49,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:49,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:49,237 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:13:49,237 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 31 treesize of output 35 [2021-06-05 16:13:49,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:49,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:49,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:49,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:30 [2021-06-05 16:13:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:49,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:49,374 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:13:49,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:49,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:49,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:49,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:13:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:49,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87685508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:49,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:49,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:13:49,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787447736] [2021-06-05 16:13:49,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:13:49,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:49,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:13:49,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:13:49,432 INFO L87 Difference]: Start difference. First operand 51630 states and 216273 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:50,207 INFO L93 Difference]: Finished difference Result 77271 states and 323197 transitions. [2021-06-05 16:13:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:13:50,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:13:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:50,425 INFO L225 Difference]: With dead ends: 77271 [2021-06-05 16:13:50,425 INFO L226 Difference]: Without dead ends: 77216 [2021-06-05 16:13:50,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:13:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77216 states. [2021-06-05 16:13:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77216 to 52019. [2021-06-05 16:13:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52019 states, 52018 states have (on average 4.185724172401861) internal successors, (217733), 52018 states have internal predecessors, (217733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52019 states to 52019 states and 217733 transitions. [2021-06-05 16:13:52,127 INFO L78 Accepts]: Start accepts. Automaton has 52019 states and 217733 transitions. Word has length 39 [2021-06-05 16:13:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:52,127 INFO L482 AbstractCegarLoop]: Abstraction has 52019 states and 217733 transitions. [2021-06-05 16:13:52,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 52019 states and 217733 transitions. [2021-06-05 16:13:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:52,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:52,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:52,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 16:13:52,436 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 37 times [2021-06-05 16:13:52,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:52,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717629227] [2021-06-05 16:13:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:52,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:52,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717629227] [2021-06-05 16:13:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717629227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:52,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922150223] [2021-06-05 16:13:52,551 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) [2021-06-05 16:13:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:13:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:52,636 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:52,636 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 35 treesize of output 17 [2021-06-05 16:13:52,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:52,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:52,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:52,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:14 [2021-06-05 16:13:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:13:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:52,704 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 50 treesize of output 14 [2021-06-05 16:13:52,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:52,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:52,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:52,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:13:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:52,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922150223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:52,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:52,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:13:52,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060849396] [2021-06-05 16:13:52,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:13:52,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:13:52,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:13:52,731 INFO L87 Difference]: Start difference. First operand 52019 states and 217733 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:53,372 INFO L93 Difference]: Finished difference Result 69922 states and 291315 transitions. [2021-06-05 16:13:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:13:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:13:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:53,564 INFO L225 Difference]: With dead ends: 69922 [2021-06-05 16:13:53,564 INFO L226 Difference]: Without dead ends: 69730 [2021-06-05 16:13:53,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:13:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69730 states. [2021-06-05 16:13:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69730 to 51940. [2021-06-05 16:13:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51940 states, 51939 states have (on average 4.1844086332043355) internal successors, (217334), 51939 states have internal predecessors, (217334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51940 states to 51940 states and 217334 transitions. [2021-06-05 16:13:55,414 INFO L78 Accepts]: Start accepts. Automaton has 51940 states and 217334 transitions. Word has length 39 [2021-06-05 16:13:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:55,414 INFO L482 AbstractCegarLoop]: Abstraction has 51940 states and 217334 transitions. [2021-06-05 16:13:55,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 51940 states and 217334 transitions. [2021-06-05 16:13:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:55,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:55,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:55,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:13:55,738 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 38 times [2021-06-05 16:13:55,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:55,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909104228] [2021-06-05 16:13:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:55,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:55,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909104228] [2021-06-05 16:13:55,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909104228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:55,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839512441] [2021-06-05 16:13:55,843 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 [2021-06-05 16:13:55,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:13:55,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:55,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:13:55,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:55,947 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:13:55,948 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 35 treesize of output 17 [2021-06-05 16:13:55,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:13:55,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:55,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:55,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:23 [2021-06-05 16:13:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:56,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:56,039 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:13:56,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:56,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:56,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:56,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:13:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:56,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839512441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:56,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:56,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 16:13:56,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822666310] [2021-06-05 16:13:56,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:13:56,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:56,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:13:56,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:13:56,094 INFO L87 Difference]: Start difference. First operand 51940 states and 217334 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2021-06-05 16:13:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:13:56,791 INFO L93 Difference]: Finished difference Result 73581 states and 308075 transitions. [2021-06-05 16:13:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:13:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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 39 [2021-06-05 16:13:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:13:57,001 INFO L225 Difference]: With dead ends: 73581 [2021-06-05 16:13:57,001 INFO L226 Difference]: Without dead ends: 73526 [2021-06-05 16:13:57,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:13:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73526 states. [2021-06-05 16:13:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73526 to 52221. [2021-06-05 16:13:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52221 states, 52220 states have (on average 4.184278054385293) internal successors, (218503), 52220 states have internal predecessors, (218503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:13:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52221 states to 52221 states and 218503 transitions. [2021-06-05 16:13:58,698 INFO L78 Accepts]: Start accepts. Automaton has 52221 states and 218503 transitions. Word has length 39 [2021-06-05 16:13:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:13:58,698 INFO L482 AbstractCegarLoop]: Abstraction has 52221 states and 218503 transitions. [2021-06-05 16:13:58,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2021-06-05 16:13:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 52221 states and 218503 transitions. [2021-06-05 16:13:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:13:58,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:13:58,804 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:13:59,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 16:13:59,004 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:13:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:13:59,005 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 39 times [2021-06-05 16:13:59,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:13:59,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654461697] [2021-06-05 16:13:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:13:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:13:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:59,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:13:59,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654461697] [2021-06-05 16:13:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654461697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:59,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867652131] [2021-06-05 16:13:59,120 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 [2021-06-05 16:13:59,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:13:59,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:13:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:13:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:13:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:59,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:59,253 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2021-06-05 16:13:59,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:59,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:59,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:13:59,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:39 [2021-06-05 16:13:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:13:59,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:59,379 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:13:59,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:13:59,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:13:59,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:13:59,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:13:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:13:59,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867652131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:13:59,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:13:59,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:13:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577393698] [2021-06-05 16:13:59,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:13:59,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:13:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:13:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:13:59,451 INFO L87 Difference]: Start difference. First operand 52221 states and 218503 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:00,361 INFO L93 Difference]: Finished difference Result 73627 states and 306879 transitions. [2021-06-05 16:14:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:14:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:00,831 INFO L225 Difference]: With dead ends: 73627 [2021-06-05 16:14:00,831 INFO L226 Difference]: Without dead ends: 73435 [2021-06-05 16:14:00,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:14:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73435 states. [2021-06-05 16:14:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73435 to 52098. [2021-06-05 16:14:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52098 states, 52097 states have (on average 4.1840796974873795) internal successors, (217978), 52097 states have internal predecessors, (217978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52098 states to 52098 states and 217978 transitions. [2021-06-05 16:14:02,227 INFO L78 Accepts]: Start accepts. Automaton has 52098 states and 217978 transitions. Word has length 39 [2021-06-05 16:14:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:02,227 INFO L482 AbstractCegarLoop]: Abstraction has 52098 states and 217978 transitions. [2021-06-05 16:14:02,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 52098 states and 217978 transitions. [2021-06-05 16:14:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:02,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:02,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:02,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:02,528 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:02,529 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 40 times [2021-06-05 16:14:02,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:02,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371859980] [2021-06-05 16:14:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:02,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371859980] [2021-06-05 16:14:02,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371859980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829678175] [2021-06-05 16:14:02,637 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 [2021-06-05 16:14:02,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:14:02,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:02,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:02,753 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:02,754 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 52 treesize of output 30 [2021-06-05 16:14:02,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:02,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:02,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:02,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 16:14:02,809 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:02,809 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 32 treesize of output 14 [2021-06-05 16:14:02,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:02,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:02,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:02,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:14:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:02,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829678175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:02,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:02,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:14:02,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231553643] [2021-06-05 16:14:02,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:14:02,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:02,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:14:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:02,828 INFO L87 Difference]: Start difference. First operand 52098 states and 217978 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-06-05 16:14:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:03,364 INFO L93 Difference]: Finished difference Result 67945 states and 284799 transitions. [2021-06-05 16:14:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:14:03,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 39 [2021-06-05 16:14:03,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:03,870 INFO L225 Difference]: With dead ends: 67945 [2021-06-05 16:14:03,870 INFO L226 Difference]: Without dead ends: 67890 [2021-06-05 16:14:03,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67890 states. [2021-06-05 16:14:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67890 to 52534. [2021-06-05 16:14:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52534 states, 52533 states have (on average 4.185864123503322) internal successors, (219896), 52533 states have internal predecessors, (219896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52534 states to 52534 states and 219896 transitions. [2021-06-05 16:14:05,252 INFO L78 Accepts]: Start accepts. Automaton has 52534 states and 219896 transitions. Word has length 39 [2021-06-05 16:14:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:05,252 INFO L482 AbstractCegarLoop]: Abstraction has 52534 states and 219896 transitions. [2021-06-05 16:14:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-06-05 16:14:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 52534 states and 219896 transitions. [2021-06-05 16:14:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:05,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:05,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:05,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:05,563 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 41 times [2021-06-05 16:14:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:05,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877266481] [2021-06-05 16:14:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:05,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877266481] [2021-06-05 16:14:05,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877266481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289713122] [2021-06-05 16:14:05,662 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 [2021-06-05 16:14:05,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:14:05,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:14:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:05,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:05,892 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 68 treesize of output 40 [2021-06-05 16:14:05,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:05,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:05,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:05,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:91, output treesize:47 [2021-06-05 16:14:05,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:05,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:05,967 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 44 treesize of output 14 [2021-06-05 16:14:05,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:05,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:05,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:05,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-06-05 16:14:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:05,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289713122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:05,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:05,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:14:05,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246526806] [2021-06-05 16:14:05,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:14:05,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:14:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:14:05,986 INFO L87 Difference]: Start difference. First operand 52534 states and 219896 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:07,157 INFO L93 Difference]: Finished difference Result 87255 states and 363244 transitions. [2021-06-05 16:14:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:14:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:07,422 INFO L225 Difference]: With dead ends: 87255 [2021-06-05 16:14:07,423 INFO L226 Difference]: Without dead ends: 87095 [2021-06-05 16:14:07,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:14:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87095 states. [2021-06-05 16:14:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87095 to 55287. [2021-06-05 16:14:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55287 states, 55286 states have (on average 4.180732916108961) internal successors, (231136), 55286 states have internal predecessors, (231136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55287 states to 55287 states and 231136 transitions. [2021-06-05 16:14:08,904 INFO L78 Accepts]: Start accepts. Automaton has 55287 states and 231136 transitions. Word has length 39 [2021-06-05 16:14:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:08,904 INFO L482 AbstractCegarLoop]: Abstraction has 55287 states and 231136 transitions. [2021-06-05 16:14:08,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 55287 states and 231136 transitions. [2021-06-05 16:14:09,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:09,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:09,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:09,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:09,216 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 42 times [2021-06-05 16:14:09,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:09,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867651917] [2021-06-05 16:14:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:09,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:09,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867651917] [2021-06-05 16:14:09,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867651917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:09,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307764207] [2021-06-05 16:14:09,314 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 [2021-06-05 16:14:09,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:14:09,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:14:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:09,464 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:09,465 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 53 treesize of output 35 [2021-06-05 16:14:09,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:09,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:09,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:09,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 16:14:09,489 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:09,489 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 32 treesize of output 14 [2021-06-05 16:14:09,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:09,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:09,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:09,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:14:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:09,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307764207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:09,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:09,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:14:09,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064953496] [2021-06-05 16:14:09,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:14:09,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:09,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:14:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:09,509 INFO L87 Difference]: Start difference. First operand 55287 states and 231136 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2021-06-05 16:14:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:10,519 INFO L93 Difference]: Finished difference Result 78720 states and 329330 transitions. [2021-06-05 16:14:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:14:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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 39 [2021-06-05 16:14:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:10,738 INFO L225 Difference]: With dead ends: 78720 [2021-06-05 16:14:10,738 INFO L226 Difference]: Without dead ends: 78665 [2021-06-05 16:14:10,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:14:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78665 states. [2021-06-05 16:14:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78665 to 54803. [2021-06-05 16:14:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54803 states, 54802 states have (on average 4.178497135141053) internal successors, (228990), 54802 states have internal predecessors, (228990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54803 states to 54803 states and 228990 transitions. [2021-06-05 16:14:12,192 INFO L78 Accepts]: Start accepts. Automaton has 54803 states and 228990 transitions. Word has length 39 [2021-06-05 16:14:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:12,192 INFO L482 AbstractCegarLoop]: Abstraction has 54803 states and 228990 transitions. [2021-06-05 16:14:12,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2021-06-05 16:14:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 54803 states and 228990 transitions. [2021-06-05 16:14:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:12,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:12,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:12,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:12,504 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:12,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 43 times [2021-06-05 16:14:12,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:12,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301286711] [2021-06-05 16:14:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:12,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301286711] [2021-06-05 16:14:12,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301286711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328872279] [2021-06-05 16:14:12,631 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 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 [2021-06-05 16:14:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:12,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:12,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:12,752 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:12,752 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 45 treesize of output 27 [2021-06-05 16:14:12,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:12,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:12,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:12,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:35 [2021-06-05 16:14:12,794 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:12,794 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 32 treesize of output 14 [2021-06-05 16:14:12,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:12,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:12,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:12,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:14:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328872279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:12,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:12,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:14:12,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912354448] [2021-06-05 16:14:12,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:14:12,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:14:12,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:12,815 INFO L87 Difference]: Start difference. First operand 54803 states and 228990 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:13,595 INFO L93 Difference]: Finished difference Result 74247 states and 308762 transitions. [2021-06-05 16:14:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:14:13,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:13,804 INFO L225 Difference]: With dead ends: 74247 [2021-06-05 16:14:13,804 INFO L226 Difference]: Without dead ends: 74055 [2021-06-05 16:14:13,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74055 states. [2021-06-05 16:14:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74055 to 54939. [2021-06-05 16:14:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54939 states, 54938 states have (on average 4.176744694018712) internal successors, (229462), 54938 states have internal predecessors, (229462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54939 states to 54939 states and 229462 transitions. [2021-06-05 16:14:15,217 INFO L78 Accepts]: Start accepts. Automaton has 54939 states and 229462 transitions. Word has length 39 [2021-06-05 16:14:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:15,218 INFO L482 AbstractCegarLoop]: Abstraction has 54939 states and 229462 transitions. [2021-06-05 16:14:15,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 54939 states and 229462 transitions. [2021-06-05 16:14:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:15,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:15,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:15,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 16:14:15,525 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 44 times [2021-06-05 16:14:15,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:15,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709786889] [2021-06-05 16:14:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:15,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:15,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709786889] [2021-06-05 16:14:15,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709786889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:15,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522302146] [2021-06-05 16:14:15,647 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 [2021-06-05 16:14:15,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:14:15,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:15,794 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:15,794 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 53 treesize of output 35 [2021-06-05 16:14:15,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:15,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:15,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:15,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 16:14:15,818 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:15,819 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 32 treesize of output 14 [2021-06-05 16:14:15,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:15,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:15,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:15,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:14:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:15,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522302146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:15,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:15,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:14:15,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420957674] [2021-06-05 16:14:15,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:14:15,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:15,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:14:15,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:15,858 INFO L87 Difference]: Start difference. First operand 54939 states and 229462 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) [2021-06-05 16:14:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:16,749 INFO L93 Difference]: Finished difference Result 76321 states and 317736 transitions. [2021-06-05 16:14:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:14:16,750 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 39 [2021-06-05 16:14:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:16,963 INFO L225 Difference]: With dead ends: 76321 [2021-06-05 16:14:16,963 INFO L226 Difference]: Without dead ends: 76231 [2021-06-05 16:14:16,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:14:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76231 states. [2021-06-05 16:14:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76231 to 54927. [2021-06-05 16:14:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54927 states, 54926 states have (on average 4.177912099916251) internal successors, (229476), 54926 states have internal predecessors, (229476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54927 states to 54927 states and 229476 transitions. [2021-06-05 16:14:18,391 INFO L78 Accepts]: Start accepts. Automaton has 54927 states and 229476 transitions. Word has length 39 [2021-06-05 16:14:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:18,391 INFO L482 AbstractCegarLoop]: Abstraction has 54927 states and 229476 transitions. [2021-06-05 16:14:18,392 INFO L483 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) [2021-06-05 16:14:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 54927 states and 229476 transitions. [2021-06-05 16:14:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:18,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:18,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:18,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:18,717 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash -956397167, now seen corresponding path program 45 times [2021-06-05 16:14:18,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:18,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259127943] [2021-06-05 16:14:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:18,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:18,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259127943] [2021-06-05 16:14:18,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259127943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:18,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439376007] [2021-06-05 16:14:18,829 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 [2021-06-05 16:14:18,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:14:18,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:14:18,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:18,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:18,953 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2021-06-05 16:14:18,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:14:18,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:18,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:18,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:40 [2021-06-05 16:14:19,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:19,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:19,076 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:14:19,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:14:19,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:19,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:14:19,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:18 [2021-06-05 16:14:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439376007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:19,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:19,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 16:14:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311102527] [2021-06-05 16:14:19,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:14:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:14:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:14:19,127 INFO L87 Difference]: Start difference. First operand 54927 states and 229476 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:20,269 INFO L93 Difference]: Finished difference Result 95632 states and 403093 transitions. [2021-06-05 16:14:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:14:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:20,545 INFO L225 Difference]: With dead ends: 95632 [2021-06-05 16:14:20,545 INFO L226 Difference]: Without dead ends: 95577 [2021-06-05 16:14:20,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:14:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95577 states. [2021-06-05 16:14:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95577 to 55552. [2021-06-05 16:14:21,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55552 states, 55551 states have (on average 4.183255026912207) internal successors, (232384), 55551 states have internal predecessors, (232384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55552 states to 55552 states and 232384 transitions. [2021-06-05 16:14:22,426 INFO L78 Accepts]: Start accepts. Automaton has 55552 states and 232384 transitions. Word has length 39 [2021-06-05 16:14:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:22,426 INFO L482 AbstractCegarLoop]: Abstraction has 55552 states and 232384 transitions. [2021-06-05 16:14:22,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 55552 states and 232384 transitions. [2021-06-05 16:14:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:22,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:22,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:22,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 16:14:22,762 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:22,763 INFO L82 PathProgramCache]: Analyzing trace with hash 978122307, now seen corresponding path program 46 times [2021-06-05 16:14:22,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:22,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474062478] [2021-06-05 16:14:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:22,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:22,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474062478] [2021-06-05 16:14:22,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474062478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:22,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836770637] [2021-06-05 16:14:22,891 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 [2021-06-05 16:14:22,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:14:22,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:22,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:22,988 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:22,988 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 35 treesize of output 17 [2021-06-05 16:14:22,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:22,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:22,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:22,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 16:14:23,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:23,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:23,056 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 50 treesize of output 14 [2021-06-05 16:14:23,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:23,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:23,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:23,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:14:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836770637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:23,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:23,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:14:23,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186829263] [2021-06-05 16:14:23,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:14:23,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:14:23,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:14:23,084 INFO L87 Difference]: Start difference. First operand 55552 states and 232384 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:23,760 INFO L93 Difference]: Finished difference Result 79462 states and 332227 transitions. [2021-06-05 16:14:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:14:23,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:23,987 INFO L225 Difference]: With dead ends: 79462 [2021-06-05 16:14:23,987 INFO L226 Difference]: Without dead ends: 79270 [2021-06-05 16:14:23,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:14:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79270 states. [2021-06-05 16:14:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79270 to 55553. [2021-06-05 16:14:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55553 states, 55552 states have (on average 4.184367799539171) internal successors, (232450), 55552 states have internal predecessors, (232450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55553 states to 55553 states and 232450 transitions. [2021-06-05 16:14:25,844 INFO L78 Accepts]: Start accepts. Automaton has 55553 states and 232450 transitions. Word has length 39 [2021-06-05 16:14:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:25,844 INFO L482 AbstractCegarLoop]: Abstraction has 55553 states and 232450 transitions. [2021-06-05 16:14:25,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 55553 states and 232450 transitions. [2021-06-05 16:14:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:25,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:25,960 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:26,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 16:14:26,161 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1651652727, now seen corresponding path program 47 times [2021-06-05 16:14:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:26,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740551772] [2021-06-05 16:14:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:26,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:26,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740551772] [2021-06-05 16:14:26,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740551772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:26,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198621555] [2021-06-05 16:14:26,276 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 [2021-06-05 16:14:26,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:14:26,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:14:26,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:26,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:26,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:26,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:26,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:14:26,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:26,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:26,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:26,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-06-05 16:14:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:26,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:26,585 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 17 treesize of output 9 [2021-06-05 16:14:26,586 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:26,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:26,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:26,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:3 [2021-06-05 16:14:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:26,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198621555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:26,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:26,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:14:26,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779100761] [2021-06-05 16:14:26,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:14:26,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:14:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:14:26,605 INFO L87 Difference]: Start difference. First operand 55553 states and 232450 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:27,855 INFO L93 Difference]: Finished difference Result 90346 states and 380016 transitions. [2021-06-05 16:14:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:14:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:28,143 INFO L225 Difference]: With dead ends: 90346 [2021-06-05 16:14:28,143 INFO L226 Difference]: Without dead ends: 90291 [2021-06-05 16:14:28,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:14:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90291 states. [2021-06-05 16:14:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90291 to 56477. [2021-06-05 16:14:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56477 states, 56476 states have (on average 4.187619519796019) internal successors, (236500), 56476 states have internal predecessors, (236500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56477 states to 56477 states and 236500 transitions. [2021-06-05 16:14:29,670 INFO L78 Accepts]: Start accepts. Automaton has 56477 states and 236500 transitions. Word has length 39 [2021-06-05 16:14:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:29,670 INFO L482 AbstractCegarLoop]: Abstraction has 56477 states and 236500 transitions. [2021-06-05 16:14:29,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 56477 states and 236500 transitions. [2021-06-05 16:14:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:29,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:29,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:29,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 16:14:29,981 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:29,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1014064697, now seen corresponding path program 48 times [2021-06-05 16:14:29,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:29,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194512748] [2021-06-05 16:14:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:30,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:30,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194512748] [2021-06-05 16:14:30,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194512748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:30,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325573411] [2021-06-05 16:14:30,089 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 [2021-06-05 16:14:30,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:14:30,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:14:30,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:30,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:30,327 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 54 [2021-06-05 16:14:30,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:30,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:30,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:30,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:86, output treesize:58 [2021-06-05 16:14:30,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:30,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:30,438 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:14:30,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:14:30,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:30,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:14:30,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:14:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:30,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325573411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:30,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:30,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:14:30,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487889968] [2021-06-05 16:14:30,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:14:30,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:30,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:14:30,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:14:30,487 INFO L87 Difference]: Start difference. First operand 56477 states and 236500 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:31,845 INFO L93 Difference]: Finished difference Result 95941 states and 404044 transitions. [2021-06-05 16:14:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:14:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:32,123 INFO L225 Difference]: With dead ends: 95941 [2021-06-05 16:14:32,123 INFO L226 Difference]: Without dead ends: 95886 [2021-06-05 16:14:32,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:14:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95886 states. [2021-06-05 16:14:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95886 to 56601. [2021-06-05 16:14:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56601 states, 56600 states have (on average 4.1906713780918725) internal successors, (237192), 56600 states have internal predecessors, (237192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56601 states to 56601 states and 237192 transitions. [2021-06-05 16:14:33,717 INFO L78 Accepts]: Start accepts. Automaton has 56601 states and 237192 transitions. Word has length 39 [2021-06-05 16:14:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:33,718 INFO L482 AbstractCegarLoop]: Abstraction has 56601 states and 237192 transitions. [2021-06-05 16:14:33,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 56601 states and 237192 transitions. [2021-06-05 16:14:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:34,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:34,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:34,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 16:14:34,367 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:34,368 INFO L82 PathProgramCache]: Analyzing trace with hash -384895263, now seen corresponding path program 49 times [2021-06-05 16:14:34,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:34,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045509900] [2021-06-05 16:14:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:34,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:34,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045509900] [2021-06-05 16:14:34,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045509900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:34,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251360554] [2021-06-05 16:14:34,513 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 [2021-06-05 16:14:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:34,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:34,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:34,632 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:34,632 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 45 treesize of output 27 [2021-06-05 16:14:34,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:34,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:34,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:34,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:38 [2021-06-05 16:14:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:34,686 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 50 treesize of output 14 [2021-06-05 16:14:34,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:34,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:34,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:34,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:14:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:34,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251360554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:34,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:34,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:14:34,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181174399] [2021-06-05 16:14:34,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:14:34,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:14:34,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:14:34,710 INFO L87 Difference]: Start difference. First operand 56601 states and 237192 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:35,270 INFO L93 Difference]: Finished difference Result 80232 states and 335489 transitions. [2021-06-05 16:14:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:14:35,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:35,499 INFO L225 Difference]: With dead ends: 80232 [2021-06-05 16:14:35,499 INFO L226 Difference]: Without dead ends: 80040 [2021-06-05 16:14:35,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80040 states. [2021-06-05 16:14:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80040 to 56777. [2021-06-05 16:14:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56777 states, 56776 states have (on average 4.188812174158095) internal successors, (237824), 56776 states have internal predecessors, (237824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56777 states to 56777 states and 237824 transitions. [2021-06-05 16:14:37,322 INFO L78 Accepts]: Start accepts. Automaton has 56777 states and 237824 transitions. Word has length 39 [2021-06-05 16:14:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:37,322 INFO L482 AbstractCegarLoop]: Abstraction has 56777 states and 237824 transitions. [2021-06-05 16:14:37,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 56777 states and 237824 transitions. [2021-06-05 16:14:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:37,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:37,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:37,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:37,663 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash -980939597, now seen corresponding path program 50 times [2021-06-05 16:14:37,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:37,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221158448] [2021-06-05 16:14:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:37,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:37,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221158448] [2021-06-05 16:14:37,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221158448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:37,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509485164] [2021-06-05 16:14:37,783 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 [2021-06-05 16:14:37,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:14:37,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:14:37,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:37,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:37,932 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 62 treesize of output 40 [2021-06-05 16:14:37,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:37,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:37,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:37,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:42 [2021-06-05 16:14:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:37,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:37,969 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 44 treesize of output 14 [2021-06-05 16:14:37,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:37,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:37,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:37,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:7 [2021-06-05 16:14:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:37,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509485164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:37,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:37,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:14:37,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236981606] [2021-06-05 16:14:37,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:14:37,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:37,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:14:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:14:37,993 INFO L87 Difference]: Start difference. First operand 56777 states and 237824 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:38,608 INFO L93 Difference]: Finished difference Result 83188 states and 348995 transitions. [2021-06-05 16:14:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:14:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:38,845 INFO L225 Difference]: With dead ends: 83188 [2021-06-05 16:14:38,846 INFO L226 Difference]: Without dead ends: 83028 [2021-06-05 16:14:38,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:14:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83028 states. [2021-06-05 16:14:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83028 to 56925. [2021-06-05 16:14:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56925 states, 56924 states have (on average 4.1900077296043845) internal successors, (238512), 56924 states have internal predecessors, (238512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56925 states to 56925 states and 238512 transitions. [2021-06-05 16:14:40,680 INFO L78 Accepts]: Start accepts. Automaton has 56925 states and 238512 transitions. Word has length 39 [2021-06-05 16:14:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:40,680 INFO L482 AbstractCegarLoop]: Abstraction has 56925 states and 238512 transitions. [2021-06-05 16:14:40,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 56925 states and 238512 transitions. [2021-06-05 16:14:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:40,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:40,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:41,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 16:14:41,001 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1836111535, now seen corresponding path program 51 times [2021-06-05 16:14:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136288742] [2021-06-05 16:14:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:41,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:41,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136288742] [2021-06-05 16:14:41,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136288742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:41,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554296596] [2021-06-05 16:14:41,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:14:41,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:14:41,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:14:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:41,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:41,346 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2021-06-05 16:14:41,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:14:41,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:41,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:41,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:86, output treesize:58 [2021-06-05 16:14:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:41,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:41,440 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:14:41,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:14:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:41,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 16:14:41,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:41,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:41,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:14:41,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:96, output treesize:34 [2021-06-05 16:14:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:41,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554296596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:41,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:41,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:14:41,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810148995] [2021-06-05 16:14:41,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:14:41,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:14:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:14:41,545 INFO L87 Difference]: Start difference. First operand 56925 states and 238512 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:43,205 INFO L93 Difference]: Finished difference Result 108092 states and 453794 transitions. [2021-06-05 16:14:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:14:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:43,548 INFO L225 Difference]: With dead ends: 108092 [2021-06-05 16:14:43,548 INFO L226 Difference]: Without dead ends: 108002 [2021-06-05 16:14:43,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 776.6ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:14:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108002 states. [2021-06-05 16:14:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108002 to 56777. [2021-06-05 16:14:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56777 states, 56776 states have (on average 4.19205298013245) internal successors, (238008), 56776 states have internal predecessors, (238008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56777 states to 56777 states and 238008 transitions. [2021-06-05 16:14:45,247 INFO L78 Accepts]: Start accepts. Automaton has 56777 states and 238008 transitions. Word has length 39 [2021-06-05 16:14:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:45,247 INFO L482 AbstractCegarLoop]: Abstraction has 56777 states and 238008 transitions. [2021-06-05 16:14:45,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 56777 states and 238008 transitions. [2021-06-05 16:14:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:45,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:45,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:45,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:45,562 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:45,562 INFO L82 PathProgramCache]: Analyzing trace with hash -42053125, now seen corresponding path program 52 times [2021-06-05 16:14:45,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:45,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241470597] [2021-06-05 16:14:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:46,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:46,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241470597] [2021-06-05 16:14:46,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241470597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:46,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956231989] [2021-06-05 16:14:46,043 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 [2021-06-05 16:14:46,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:14:46,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:46,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:46,190 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:46,190 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 47 treesize of output 29 [2021-06-05 16:14:46,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:46,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:46,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:46,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:42 [2021-06-05 16:14:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:46,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:46,296 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 50 treesize of output 14 [2021-06-05 16:14:46,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:46,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:46,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:46,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:14:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:46,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956231989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:46,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:46,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:14:46,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174209613] [2021-06-05 16:14:46,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:14:46,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:46,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:14:46,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:14:46,315 INFO L87 Difference]: Start difference. First operand 56777 states and 238008 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:14:46,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:46,986 INFO L93 Difference]: Finished difference Result 93414 states and 394789 transitions. [2021-06-05 16:14:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:14:46,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-06-05 16:14:46,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:47,266 INFO L225 Difference]: With dead ends: 93414 [2021-06-05 16:14:47,267 INFO L226 Difference]: Without dead ends: 93359 [2021-06-05 16:14:47,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 560.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:14:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93359 states. [2021-06-05 16:14:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93359 to 60412. [2021-06-05 16:14:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60412 states, 60411 states have (on average 4.198705533760408) internal successors, (253648), 60411 states have internal predecessors, (253648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60412 states to 60412 states and 253648 transitions. [2021-06-05 16:14:49,250 INFO L78 Accepts]: Start accepts. Automaton has 60412 states and 253648 transitions. Word has length 39 [2021-06-05 16:14:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:49,250 INFO L482 AbstractCegarLoop]: Abstraction has 60412 states and 253648 transitions. [2021-06-05 16:14:49,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:14:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 60412 states and 253648 transitions. [2021-06-05 16:14:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:49,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:49,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:49,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:49,569 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash -679641155, now seen corresponding path program 53 times [2021-06-05 16:14:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102514203] [2021-06-05 16:14:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:49,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:49,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102514203] [2021-06-05 16:14:49,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102514203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:49,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599638666] [2021-06-05 16:14:49,672 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 [2021-06-05 16:14:49,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:14:49,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:14:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:49,848 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:49,849 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 53 treesize of output 35 [2021-06-05 16:14:49,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:49,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:49,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:49,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:42 [2021-06-05 16:14:49,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:49,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:49,895 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 44 treesize of output 14 [2021-06-05 16:14:49,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:49,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:49,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:49,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:7 [2021-06-05 16:14:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599638666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:49,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:49,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:14:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223607062] [2021-06-05 16:14:49,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:14:49,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:14:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:14:49,926 INFO L87 Difference]: Start difference. First operand 60412 states and 253648 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:14:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:51,047 INFO L93 Difference]: Finished difference Result 93577 states and 395481 transitions. [2021-06-05 16:14:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:14:51,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-06-05 16:14:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:51,326 INFO L225 Difference]: With dead ends: 93577 [2021-06-05 16:14:51,327 INFO L226 Difference]: Without dead ends: 93522 [2021-06-05 16:14:51,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93522 states. [2021-06-05 16:14:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93522 to 60168. [2021-06-05 16:14:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60168 states, 60167 states have (on average 4.198879784599531) internal successors, (252634), 60167 states have internal predecessors, (252634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60168 states to 60168 states and 252634 transitions. [2021-06-05 16:14:52,856 INFO L78 Accepts]: Start accepts. Automaton has 60168 states and 252634 transitions. Word has length 39 [2021-06-05 16:14:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:52,856 INFO L482 AbstractCegarLoop]: Abstraction has 60168 states and 252634 transitions. [2021-06-05 16:14:52,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:14:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 60168 states and 252634 transitions. [2021-06-05 16:14:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:52,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:52,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:53,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:53,185 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1223187059, now seen corresponding path program 54 times [2021-06-05 16:14:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:53,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506737248] [2021-06-05 16:14:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:53,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506737248] [2021-06-05 16:14:53,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506737248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942166982] [2021-06-05 16:14:53,286 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 [2021-06-05 16:14:53,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:14:53,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:53,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:14:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:53,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:53,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:53,466 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 62 treesize of output 40 [2021-06-05 16:14:53,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:53,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:53,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:53,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:28 [2021-06-05 16:14:53,492 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:53,493 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 32 treesize of output 14 [2021-06-05 16:14:53,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:53,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:53,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:53,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:14:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:53,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942166982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:53,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:53,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:14:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583862719] [2021-06-05 16:14:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:14:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:14:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:14:53,512 INFO L87 Difference]: Start difference. First operand 60168 states and 252634 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:54,596 INFO L93 Difference]: Finished difference Result 92403 states and 390707 transitions. [2021-06-05 16:14:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:14:54,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:14:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:54,869 INFO L225 Difference]: With dead ends: 92403 [2021-06-05 16:14:54,870 INFO L226 Difference]: Without dead ends: 92348 [2021-06-05 16:14:54,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92348 states. [2021-06-05 16:14:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92348 to 59146. [2021-06-05 16:14:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59146 states, 59145 states have (on average 4.195857638008285) internal successors, (248164), 59145 states have internal predecessors, (248164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59146 states to 59146 states and 248164 transitions. [2021-06-05 16:14:56,500 INFO L78 Accepts]: Start accepts. Automaton has 59146 states and 248164 transitions. Word has length 39 [2021-06-05 16:14:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:56,500 INFO L482 AbstractCegarLoop]: Abstraction has 59146 states and 248164 transitions. [2021-06-05 16:14:56,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 59146 states and 248164 transitions. [2021-06-05 16:14:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:14:56,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:56,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:56,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:56,818 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1432973821, now seen corresponding path program 55 times [2021-06-05 16:14:56,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:56,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504066871] [2021-06-05 16:14:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:56,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:56,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504066871] [2021-06-05 16:14:56,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504066871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:56,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490202929] [2021-06-05 16:14:56,915 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 [2021-06-05 16:14:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:57,708 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:14:57,709 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 57 treesize of output 39 [2021-06-05 16:14:57,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:57,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:57,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:57,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:14:57,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:57,769 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 50 treesize of output 14 [2021-06-05 16:14:57,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:57,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:57,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:57,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:14:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:57,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490202929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:57,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:57,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:14:57,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608352253] [2021-06-05 16:14:57,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:14:57,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:14:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:14:57,789 INFO L87 Difference]: Start difference. First operand 59146 states and 248164 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:14:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:58,547 INFO L93 Difference]: Finished difference Result 92755 states and 391851 transitions. [2021-06-05 16:14:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:14:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-06-05 16:14:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:58,819 INFO L225 Difference]: With dead ends: 92755 [2021-06-05 16:14:58,819 INFO L226 Difference]: Without dead ends: 92700 [2021-06-05 16:14:58,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:14:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92700 states. [2021-06-05 16:15:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92700 to 59774. [2021-06-05 16:15:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59774 states, 59773 states have (on average 4.198417345624279) internal successors, (250952), 59773 states have internal predecessors, (250952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59774 states to 59774 states and 250952 transitions. [2021-06-05 16:15:00,740 INFO L78 Accepts]: Start accepts. Automaton has 59774 states and 250952 transitions. Word has length 39 [2021-06-05 16:15:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:00,740 INFO L482 AbstractCegarLoop]: Abstraction has 59774 states and 250952 transitions. [2021-06-05 16:15:00,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:15:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 59774 states and 250952 transitions. [2021-06-05 16:15:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:00,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:00,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:01,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:01,060 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:01,060 INFO L82 PathProgramCache]: Analyzing trace with hash -777293699, now seen corresponding path program 56 times [2021-06-05 16:15:01,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:01,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915483771] [2021-06-05 16:15:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:01,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915483771] [2021-06-05 16:15:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915483771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938746566] [2021-06-05 16:15:01,155 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 [2021-06-05 16:15:01,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:15:01,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:01,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:01,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:01,314 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 58 treesize of output 30 [2021-06-05 16:15:01,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:01,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:01,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:01,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:28 [2021-06-05 16:15:01,355 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:15:01,355 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 32 treesize of output 14 [2021-06-05 16:15:01,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:01,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:01,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:01,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:15:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938746566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:01,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:01,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:15:01,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664470557] [2021-06-05 16:15:01,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:15:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:15:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:15:01,375 INFO L87 Difference]: Start difference. First operand 59774 states and 250952 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:02,469 INFO L93 Difference]: Finished difference Result 88425 states and 373513 transitions. [2021-06-05 16:15:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:15:02,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:15:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:02,765 INFO L225 Difference]: With dead ends: 88425 [2021-06-05 16:15:02,765 INFO L226 Difference]: Without dead ends: 88370 [2021-06-05 16:15:02,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:15:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88370 states. [2021-06-05 16:15:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88370 to 59710. [2021-06-05 16:15:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59710 states, 59709 states have (on average 4.201912609489357) internal successors, (250892), 59709 states have internal predecessors, (250892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59710 states to 59710 states and 250892 transitions. [2021-06-05 16:15:04,356 INFO L78 Accepts]: Start accepts. Automaton has 59710 states and 250892 transitions. Word has length 39 [2021-06-05 16:15:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:04,356 INFO L482 AbstractCegarLoop]: Abstraction has 59710 states and 250892 transitions. [2021-06-05 16:15:04,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 59710 states and 250892 transitions. [2021-06-05 16:15:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:04,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:04,477 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:04,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:04,677 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:04,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1992353375, now seen corresponding path program 57 times [2021-06-05 16:15:04,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:04,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562386842] [2021-06-05 16:15:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:04,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:04,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562386842] [2021-06-05 16:15:04,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562386842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:04,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032598591] [2021-06-05 16:15:04,821 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 [2021-06-05 16:15:04,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:15:04,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:15:04,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:04,984 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:15:04,984 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 41 treesize of output 45 [2021-06-05 16:15:04,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:15:05,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:05,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:05,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:53 [2021-06-05 16:15:05,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:05,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:05,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 16:15:05,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:15:05,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:05,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:15:05,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 16:15:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:05,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032598591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:05,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:05,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:15:05,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797587669] [2021-06-05 16:15:05,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:15:05,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:05,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:15:05,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:15:05,143 INFO L87 Difference]: Start difference. First operand 59710 states and 250892 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2021-06-05 16:15:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:07,243 INFO L93 Difference]: Finished difference Result 147021 states and 616524 transitions. [2021-06-05 16:15:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:15:07,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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 39 [2021-06-05 16:15:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:08,110 INFO L225 Difference]: With dead ends: 147021 [2021-06-05 16:15:08,110 INFO L226 Difference]: Without dead ends: 146532 [2021-06-05 16:15:08,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1131.8ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:15:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146532 states. [2021-06-05 16:15:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146532 to 63283. [2021-06-05 16:15:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63283 states, 63282 states have (on average 4.1892639297114505) internal successors, (265105), 63282 states have internal predecessors, (265105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63283 states to 63283 states and 265105 transitions. [2021-06-05 16:15:10,177 INFO L78 Accepts]: Start accepts. Automaton has 63283 states and 265105 transitions. Word has length 39 [2021-06-05 16:15:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:10,177 INFO L482 AbstractCegarLoop]: Abstraction has 63283 states and 265105 transitions. [2021-06-05 16:15:10,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2021-06-05 16:15:10,177 INFO L276 IsEmpty]: Start isEmpty. Operand 63283 states and 265105 transitions. [2021-06-05 16:15:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:10,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:10,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:10,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:10,507 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1196219571, now seen corresponding path program 58 times [2021-06-05 16:15:10,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:10,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613563835] [2021-06-05 16:15:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:10,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:10,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613563835] [2021-06-05 16:15:10,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613563835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:10,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292870351] [2021-06-05 16:15:10,621 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 [2021-06-05 16:15:10,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:15:10,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:10,774 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:15:10,774 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 57 treesize of output 39 [2021-06-05 16:15:10,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:10,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:10,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:10,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:15:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:10,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:10,815 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 50 treesize of output 14 [2021-06-05 16:15:10,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:10,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:10,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:10,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:15:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:10,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292870351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:10,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:10,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:15:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970325912] [2021-06-05 16:15:10,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:15:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:15:10,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:15:10,839 INFO L87 Difference]: Start difference. First operand 63283 states and 265105 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) [2021-06-05 16:15:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:11,864 INFO L93 Difference]: Finished difference Result 94146 states and 395430 transitions. [2021-06-05 16:15:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:15:11,865 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 39 [2021-06-05 16:15:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:12,134 INFO L225 Difference]: With dead ends: 94146 [2021-06-05 16:15:12,134 INFO L226 Difference]: Without dead ends: 93986 [2021-06-05 16:15:12,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:15:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93986 states. [2021-06-05 16:15:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93986 to 63735. [2021-06-05 16:15:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63735 states, 63734 states have (on average 4.190996956098785) internal successors, (267109), 63734 states have internal predecessors, (267109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63735 states to 63735 states and 267109 transitions. [2021-06-05 16:15:14,246 INFO L78 Accepts]: Start accepts. Automaton has 63735 states and 267109 transitions. Word has length 39 [2021-06-05 16:15:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:14,246 INFO L482 AbstractCegarLoop]: Abstraction has 63735 states and 267109 transitions. [2021-06-05 16:15:14,246 INFO L483 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) [2021-06-05 16:15:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 63735 states and 267109 transitions. [2021-06-05 16:15:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:14,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:14,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:14,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:14,602 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash -281696593, now seen corresponding path program 59 times [2021-06-05 16:15:14,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:14,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900506591] [2021-06-05 16:15:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:14,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900506591] [2021-06-05 16:15:14,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900506591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071620708] [2021-06-05 16:15:14,731 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 [2021-06-05 16:15:14,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:15:14,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:15:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:14,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:15:14,963 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 41 treesize of output 29 [2021-06-05 16:15:14,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:14,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:14,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:14,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:33 [2021-06-05 16:15:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:15,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:15,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:15,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:15:15,002 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:15,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:15,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:15,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 16:15:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:15,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071620708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:15,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:15,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:15:15,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646708699] [2021-06-05 16:15:15,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:15:15,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:15:15,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:15:15,027 INFO L87 Difference]: Start difference. First operand 63735 states and 267109 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:15:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:16,832 INFO L93 Difference]: Finished difference Result 101362 states and 423826 transitions. [2021-06-05 16:15:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:15:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 39 [2021-06-05 16:15:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:17,171 INFO L225 Difference]: With dead ends: 101362 [2021-06-05 16:15:17,171 INFO L226 Difference]: Without dead ends: 101272 [2021-06-05 16:15:17,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:15:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101272 states. [2021-06-05 16:15:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101272 to 66230. [2021-06-05 16:15:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66230 states, 66229 states have (on average 4.192785637711577) internal successors, (277684), 66229 states have internal predecessors, (277684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66230 states to 66230 states and 277684 transitions. [2021-06-05 16:15:18,967 INFO L78 Accepts]: Start accepts. Automaton has 66230 states and 277684 transitions. Word has length 39 [2021-06-05 16:15:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:18,967 INFO L482 AbstractCegarLoop]: Abstraction has 66230 states and 277684 transitions. [2021-06-05 16:15:18,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:15:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 66230 states and 277684 transitions. [2021-06-05 16:15:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:19,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:19,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:19,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 16:15:19,301 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:19,301 INFO L82 PathProgramCache]: Analyzing trace with hash -570345229, now seen corresponding path program 60 times [2021-06-05 16:15:19,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:19,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751676539] [2021-06-05 16:15:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:19,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:19,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751676539] [2021-06-05 16:15:19,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751676539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:19,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841637461] [2021-06-05 16:15:19,426 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 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 [2021-06-05 16:15:19,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:15:19,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:19,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:15:19,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:19,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:19,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:19,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:19,634 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 43 treesize of output 25 [2021-06-05 16:15:19,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:19,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:19,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:19,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2021-06-05 16:15:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:19,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:19,697 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 44 treesize of output 14 [2021-06-05 16:15:19,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:19,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:19,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:19,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:7 [2021-06-05 16:15:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:19,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841637461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:19,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:19,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:15:19,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987494113] [2021-06-05 16:15:19,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:15:19,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:19,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:15:19,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:15:19,727 INFO L87 Difference]: Start difference. First operand 66230 states and 277684 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:20,976 INFO L93 Difference]: Finished difference Result 94437 states and 395961 transitions. [2021-06-05 16:15:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:15:20,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:15:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:21,244 INFO L225 Difference]: With dead ends: 94437 [2021-06-05 16:15:21,244 INFO L226 Difference]: Without dead ends: 94347 [2021-06-05 16:15:21,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:15:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94347 states. [2021-06-05 16:15:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94347 to 66186. [2021-06-05 16:15:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66186 states, 66185 states have (on average 4.194787338520813) internal successors, (277632), 66185 states have internal predecessors, (277632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66186 states to 66186 states and 277632 transitions. [2021-06-05 16:15:23,341 INFO L78 Accepts]: Start accepts. Automaton has 66186 states and 277632 transitions. Word has length 39 [2021-06-05 16:15:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:23,341 INFO L482 AbstractCegarLoop]: Abstraction has 66186 states and 277632 transitions. [2021-06-05 16:15:23,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 66186 states and 277632 transitions. [2021-06-05 16:15:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:23,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:23,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:23,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:23,675 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash -14258787, now seen corresponding path program 61 times [2021-06-05 16:15:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:23,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609334478] [2021-06-05 16:15:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:23,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609334478] [2021-06-05 16:15:23,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609334478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159027691] [2021-06-05 16:15:23,797 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 [2021-06-05 16:15:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:23,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:23,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:23,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:23,906 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 17 [2021-06-05 16:15:23,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:23,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:23,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:23,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:28 [2021-06-05 16:15:24,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:24,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:24,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:24,014 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 50 treesize of output 14 [2021-06-05 16:15:24,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:24,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:24,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:24,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:15:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:24,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159027691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:24,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:24,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:15:24,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385676312] [2021-06-05 16:15:24,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:15:24,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:24,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:15:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:15:24,033 INFO L87 Difference]: Start difference. First operand 66186 states and 277632 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2021-06-05 16:15:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:25,190 INFO L93 Difference]: Finished difference Result 101390 states and 423254 transitions. [2021-06-05 16:15:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:15:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 39 [2021-06-05 16:15:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:25,539 INFO L225 Difference]: With dead ends: 101390 [2021-06-05 16:15:25,539 INFO L226 Difference]: Without dead ends: 101060 [2021-06-05 16:15:25,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:15:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101060 states. [2021-06-05 16:15:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101060 to 68895. [2021-06-05 16:15:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68895 states, 68894 states have (on average 4.195619357273492) internal successors, (289053), 68894 states have internal predecessors, (289053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68895 states to 68895 states and 289053 transitions. [2021-06-05 16:15:27,333 INFO L78 Accepts]: Start accepts. Automaton has 68895 states and 289053 transitions. Word has length 39 [2021-06-05 16:15:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:27,333 INFO L482 AbstractCegarLoop]: Abstraction has 68895 states and 289053 transitions. [2021-06-05 16:15:27,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2021-06-05 16:15:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 68895 states and 289053 transitions. [2021-06-05 16:15:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:27,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:27,471 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:27,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:27,671 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1920260687, now seen corresponding path program 62 times [2021-06-05 16:15:27,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:27,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031257345] [2021-06-05 16:15:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:27,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031257345] [2021-06-05 16:15:27,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031257345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233834557] [2021-06-05 16:15:27,812 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 [2021-06-05 16:15:27,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:15:27,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:27,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:27,933 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 17 [2021-06-05 16:15:27,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:27,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:27,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:27,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:28 [2021-06-05 16:15:28,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:28,009 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 50 treesize of output 14 [2021-06-05 16:15:28,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:28,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:28,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:28,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:15:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:28,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233834557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:28,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:28,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:15:28,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512742196] [2021-06-05 16:15:28,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:15:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:15:28,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:15:28,034 INFO L87 Difference]: Start difference. First operand 68895 states and 289053 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:29,121 INFO L93 Difference]: Finished difference Result 98822 states and 408326 transitions. [2021-06-05 16:15:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:15:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:15:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:29,418 INFO L225 Difference]: With dead ends: 98822 [2021-06-05 16:15:29,419 INFO L226 Difference]: Without dead ends: 98387 [2021-06-05 16:15:29,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:15:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98387 states. [2021-06-05 16:15:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98387 to 69083. [2021-06-05 16:15:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69083 states, 69082 states have (on average 4.198141339277959) internal successors, (290016), 69082 states have internal predecessors, (290016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69083 states to 69083 states and 290016 transitions. [2021-06-05 16:15:31,624 INFO L78 Accepts]: Start accepts. Automaton has 69083 states and 290016 transitions. Word has length 39 [2021-06-05 16:15:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:31,625 INFO L482 AbstractCegarLoop]: Abstraction has 69083 states and 290016 transitions. [2021-06-05 16:15:31,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 69083 states and 290016 transitions. [2021-06-05 16:15:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:31,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:31,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:31,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-06-05 16:15:31,965 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 927758839, now seen corresponding path program 63 times [2021-06-05 16:15:31,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:31,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864181637] [2021-06-05 16:15:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:32,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:32,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864181637] [2021-06-05 16:15:32,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864181637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:32,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840652357] [2021-06-05 16:15:32,081 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 [2021-06-05 16:15:32,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:15:32,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:15:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:32,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:32,248 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 48 [2021-06-05 16:15:32,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:32,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:32,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:32,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:58 [2021-06-05 16:15:32,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:32,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:32,401 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:15:32,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:15:32,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:32,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:15:32,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:15:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:32,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840652357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:32,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:32,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:15:32,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037878332] [2021-06-05 16:15:32,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:15:32,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:32,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:15:32,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:15:32,449 INFO L87 Difference]: Start difference. First operand 69083 states and 290016 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:33,882 INFO L93 Difference]: Finished difference Result 117130 states and 491571 transitions. [2021-06-05 16:15:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:15:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:15:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:34,247 INFO L225 Difference]: With dead ends: 117130 [2021-06-05 16:15:34,247 INFO L226 Difference]: Without dead ends: 117043 [2021-06-05 16:15:34,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:15:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117043 states. [2021-06-05 16:15:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117043 to 69453. [2021-06-05 16:15:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69453 states, 69452 states have (on average 4.199072740885792) internal successors, (291634), 69452 states have internal predecessors, (291634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69453 states to 69453 states and 291634 transitions. [2021-06-05 16:15:36,501 INFO L78 Accepts]: Start accepts. Automaton has 69453 states and 291634 transitions. Word has length 39 [2021-06-05 16:15:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:36,501 INFO L482 AbstractCegarLoop]: Abstraction has 69453 states and 291634 transitions. [2021-06-05 16:15:36,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 69453 states and 291634 transitions. [2021-06-05 16:15:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:36,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:36,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:36,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:36,877 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash 290170809, now seen corresponding path program 64 times [2021-06-05 16:15:36,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:36,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759270950] [2021-06-05 16:15:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:37,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:37,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759270950] [2021-06-05 16:15:37,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759270950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:37,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133135991] [2021-06-05 16:15:37,000 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 [2021-06-05 16:15:37,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:15:37,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:37,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:37,268 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 70 treesize of output 42 [2021-06-05 16:15:37,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:37,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:37,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:37,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:40 [2021-06-05 16:15:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:37,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:37,318 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 34 treesize of output 14 [2021-06-05 16:15:37,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:37,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:37,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:37,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:7 [2021-06-05 16:15:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:37,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133135991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:37,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:37,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:15:37,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330660911] [2021-06-05 16:15:37,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:15:37,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:37,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:15:37,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:15:37,337 INFO L87 Difference]: Start difference. First operand 69453 states and 291634 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:38,486 INFO L93 Difference]: Finished difference Result 110882 states and 465508 transitions. [2021-06-05 16:15:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:15:38,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:15:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:38,830 INFO L225 Difference]: With dead ends: 110882 [2021-06-05 16:15:38,830 INFO L226 Difference]: Without dead ends: 110795 [2021-06-05 16:15:38,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:15:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110795 states. [2021-06-05 16:15:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110795 to 70221. [2021-06-05 16:15:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70221 states, 70220 states have (on average 4.202648818000569) internal successors, (295110), 70220 states have internal predecessors, (295110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70221 states to 70221 states and 295110 transitions. [2021-06-05 16:15:40,656 INFO L78 Accepts]: Start accepts. Automaton has 70221 states and 295110 transitions. Word has length 39 [2021-06-05 16:15:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:40,656 INFO L482 AbstractCegarLoop]: Abstraction has 70221 states and 295110 transitions. [2021-06-05 16:15:40,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 70221 states and 295110 transitions. [2021-06-05 16:15:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:40,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:40,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:40,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:41,000 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:41,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1108789151, now seen corresponding path program 65 times [2021-06-05 16:15:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602591373] [2021-06-05 16:15:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:41,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:41,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602591373] [2021-06-05 16:15:41,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602591373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:41,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508132210] [2021-06-05 16:15:41,147 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 [2021-06-05 16:15:41,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:15:41,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:15:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:41,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:41,333 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-06-05 16:15:41,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:15:41,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:41,689 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-06-05 16:15:41,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:41,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:34 [2021-06-05 16:15:41,795 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:15:41,795 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 21 treesize of output 9 [2021-06-05 16:15:41,802 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:41,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:41,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:41,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2021-06-05 16:15:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:41,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508132210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:41,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:41,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:15:41,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868552818] [2021-06-05 16:15:41,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:15:41,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:15:41,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:15:41,825 INFO L87 Difference]: Start difference. First operand 70221 states and 295110 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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) [2021-06-05 16:15:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:43,777 INFO L93 Difference]: Finished difference Result 130935 states and 538919 transitions. [2021-06-05 16:15:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:15:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:15:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:44,190 INFO L225 Difference]: With dead ends: 130935 [2021-06-05 16:15:44,190 INFO L226 Difference]: Without dead ends: 130315 [2021-06-05 16:15:44,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:15:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130315 states. [2021-06-05 16:15:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130315 to 78765. [2021-06-05 16:15:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78765 states, 78764 states have (on average 4.2050302168503375) internal successors, (331205), 78764 states have internal predecessors, (331205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78765 states to 78765 states and 331205 transitions. [2021-06-05 16:15:46,339 INFO L78 Accepts]: Start accepts. Automaton has 78765 states and 331205 transitions. Word has length 39 [2021-06-05 16:15:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:46,339 INFO L482 AbstractCegarLoop]: Abstraction has 78765 states and 331205 transitions. [2021-06-05 16:15:46,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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) [2021-06-05 16:15:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 78765 states and 331205 transitions. [2021-06-05 16:15:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:47,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:47,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:47,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 16:15:47,229 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1112217647, now seen corresponding path program 66 times [2021-06-05 16:15:47,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:47,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098145827] [2021-06-05 16:15:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:47,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:47,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098145827] [2021-06-05 16:15:47,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098145827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262888333] [2021-06-05 16:15:47,367 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 [2021-06-05 16:15:47,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:15:47,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:47,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:47,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:47,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:47,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:47,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:47,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 16:15:47,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:15:47,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:47,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:47,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:79, output treesize:45 [2021-06-05 16:15:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:47,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 16:15:47,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:47,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:47,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:47,739 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-06-05 16:15:47,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:15:47,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:47,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:15:47,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:32 [2021-06-05 16:15:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:47,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262888333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:47,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:47,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:15:47,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290718074] [2021-06-05 16:15:47,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:15:47,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:47,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:15:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:15:47,842 INFO L87 Difference]: Start difference. First operand 78765 states and 331205 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2021-06-05 16:15:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:50,384 INFO L93 Difference]: Finished difference Result 172567 states and 722103 transitions. [2021-06-05 16:15:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:15:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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 39 [2021-06-05 16:15:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:50,934 INFO L225 Difference]: With dead ends: 172567 [2021-06-05 16:15:50,935 INFO L226 Difference]: Without dead ends: 172203 [2021-06-05 16:15:50,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1003.6ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:15:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172203 states. [2021-06-05 16:15:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172203 to 80063. [2021-06-05 16:15:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80063 states, 80062 states have (on average 4.204841248032775) internal successors, (336648), 80062 states have internal predecessors, (336648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80063 states to 80063 states and 336648 transitions. [2021-06-05 16:15:53,775 INFO L78 Accepts]: Start accepts. Automaton has 80063 states and 336648 transitions. Word has length 39 [2021-06-05 16:15:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:53,775 INFO L482 AbstractCegarLoop]: Abstraction has 80063 states and 336648 transitions. [2021-06-05 16:15:53,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2021-06-05 16:15:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 80063 states and 336648 transitions. [2021-06-05 16:15:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:53,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:53,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:54,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 16:15:54,136 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2061876957, now seen corresponding path program 67 times [2021-06-05 16:15:54,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:54,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756354675] [2021-06-05 16:15:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:54,556 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-06-05 16:15:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:54,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:54,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756354675] [2021-06-05 16:15:54,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756354675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:54,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736285561] [2021-06-05 16:15:54,655 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) [2021-06-05 16:15:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:54,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:54,894 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 58 treesize of output 30 [2021-06-05 16:15:54,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:54,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:54,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:54,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:38 [2021-06-05 16:15:55,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:55,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:55,018 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 34 treesize of output 14 [2021-06-05 16:15:55,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:55,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:55,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:55,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:7 [2021-06-05 16:15:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:55,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736285561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:55,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:55,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:15:55,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780611428] [2021-06-05 16:15:55,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:15:55,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:55,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:15:55,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:15:55,041 INFO L87 Difference]: Start difference. First operand 80063 states and 336648 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:55,983 INFO L93 Difference]: Finished difference Result 115950 states and 486620 transitions. [2021-06-05 16:15:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:15:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:15:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:56,924 INFO L225 Difference]: With dead ends: 115950 [2021-06-05 16:15:56,924 INFO L226 Difference]: Without dead ends: 115863 [2021-06-05 16:15:56,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 760.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:15:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115863 states. [2021-06-05 16:15:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115863 to 81072. [2021-06-05 16:15:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81072 states, 81071 states have (on average 4.203932355589545) internal successors, (340817), 81071 states have internal predecessors, (340817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81072 states to 81072 states and 340817 transitions. [2021-06-05 16:15:59,132 INFO L78 Accepts]: Start accepts. Automaton has 81072 states and 340817 transitions. Word has length 39 [2021-06-05 16:15:59,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:59,132 INFO L482 AbstractCegarLoop]: Abstraction has 81072 states and 340817 transitions. [2021-06-05 16:15:59,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81072 states and 340817 transitions. [2021-06-05 16:15:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:15:59,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:59,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:59,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 16:15:59,497 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash -826464783, now seen corresponding path program 68 times [2021-06-05 16:15:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:59,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741573769] [2021-06-05 16:15:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:59,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741573769] [2021-06-05 16:15:59,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741573769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:59,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823092641] [2021-06-05 16:15:59,637 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 [2021-06-05 16:15:59,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:15:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:15:59,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:59,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:59,857 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 64 treesize of output 36 [2021-06-05 16:15:59,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:59,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:59,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:59,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:84, output treesize:46 [2021-06-05 16:15:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:59,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:59,919 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:15:59,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:15:59,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:59,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:15:59,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:15:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:59,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823092641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:59,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:59,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:15:59,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816310430] [2021-06-05 16:15:59,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:15:59,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:15:59,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:15:59,970 INFO L87 Difference]: Start difference. First operand 81072 states and 340817 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:01,616 INFO L93 Difference]: Finished difference Result 127969 states and 536447 transitions. [2021-06-05 16:16:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:16:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:16:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:02,464 INFO L225 Difference]: With dead ends: 127969 [2021-06-05 16:16:02,464 INFO L226 Difference]: Without dead ends: 127882 [2021-06-05 16:16:02,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:16:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127882 states. [2021-06-05 16:16:04,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127882 to 80556. [2021-06-05 16:16:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80556 states, 80555 states have (on average 4.202656570045311) internal successors, (338545), 80555 states have internal predecessors, (338545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80556 states to 80556 states and 338545 transitions. [2021-06-05 16:16:04,542 INFO L78 Accepts]: Start accepts. Automaton has 80556 states and 338545 transitions. Word has length 39 [2021-06-05 16:16:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:04,542 INFO L482 AbstractCegarLoop]: Abstraction has 80556 states and 338545 transitions. [2021-06-05 16:16:04,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 80556 states and 338545 transitions. [2021-06-05 16:16:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:04,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:04,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:04,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 16:16:04,918 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash 592528241, now seen corresponding path program 69 times [2021-06-05 16:16:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:04,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337561108] [2021-06-05 16:16:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:05,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:05,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337561108] [2021-06-05 16:16:05,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337561108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:05,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566420629] [2021-06-05 16:16:05,061 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 [2021-06-05 16:16:05,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:16:05,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:16:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:05,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2021-06-05 16:16:05,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:16:05,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:05,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:16:05,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:56 [2021-06-05 16:16:05,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 16:16:05,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:05,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:05,760 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:16:05,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:16:05,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:05,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:16:05,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:36 [2021-06-05 16:16:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566420629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:05,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:05,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:16:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650031208] [2021-06-05 16:16:05,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:16:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:16:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:16:05,859 INFO L87 Difference]: Start difference. First operand 80556 states and 338545 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:16:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:08,597 INFO L93 Difference]: Finished difference Result 184366 states and 778402 transitions. [2021-06-05 16:16:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:16:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 39 [2021-06-05 16:16:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:09,203 INFO L225 Difference]: With dead ends: 184366 [2021-06-05 16:16:09,203 INFO L226 Difference]: Without dead ends: 184215 [2021-06-05 16:16:09,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1170.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:16:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184215 states. [2021-06-05 16:16:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184215 to 82721. [2021-06-05 16:16:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82721 states, 82720 states have (on average 4.206757736943907) internal successors, (347983), 82720 states have internal predecessors, (347983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82721 states to 82721 states and 347983 transitions. [2021-06-05 16:16:12,255 INFO L78 Accepts]: Start accepts. Automaton has 82721 states and 347983 transitions. Word has length 39 [2021-06-05 16:16:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:12,256 INFO L482 AbstractCegarLoop]: Abstraction has 82721 states and 347983 transitions. [2021-06-05 16:16:12,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:16:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 82721 states and 347983 transitions. [2021-06-05 16:16:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:12,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:12,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:12,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 16:16:12,624 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash -15830457, now seen corresponding path program 70 times [2021-06-05 16:16:12,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:12,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412595322] [2021-06-05 16:16:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:13,000 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2021-06-05 16:16:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:13,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:13,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412595322] [2021-06-05 16:16:13,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412595322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:13,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396774294] [2021-06-05 16:16:13,198 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 [2021-06-05 16:16:13,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:16:13,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:16:13,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:13,390 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 51 treesize of output 31 [2021-06-05 16:16:13,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:13,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:36 [2021-06-05 16:16:13,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:13,449 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 50 treesize of output 14 [2021-06-05 16:16:13,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:13,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:13,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:16:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:13,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396774294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:13,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:13,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:16:13,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741028925] [2021-06-05 16:16:13,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:16:13,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:16:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:16:13,474 INFO L87 Difference]: Start difference. First operand 82721 states and 347983 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2021-06-05 16:16:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:15,023 INFO L93 Difference]: Finished difference Result 141337 states and 590419 transitions. [2021-06-05 16:16:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:16:15,023 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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 39 [2021-06-05 16:16:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:15,472 INFO L225 Difference]: With dead ends: 141337 [2021-06-05 16:16:15,472 INFO L226 Difference]: Without dead ends: 140790 [2021-06-05 16:16:15,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:16:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140790 states. [2021-06-05 16:16:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140790 to 83045. [2021-06-05 16:16:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83045 states, 83044 states have (on average 4.206191898270796) internal successors, (349299), 83044 states have internal predecessors, (349299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83045 states to 83045 states and 349299 transitions. [2021-06-05 16:16:18,183 INFO L78 Accepts]: Start accepts. Automaton has 83045 states and 349299 transitions. Word has length 39 [2021-06-05 16:16:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:18,183 INFO L482 AbstractCegarLoop]: Abstraction has 83045 states and 349299 transitions. [2021-06-05 16:16:18,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 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) [2021-06-05 16:16:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 83045 states and 349299 transitions. [2021-06-05 16:16:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:18,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:18,361 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:18,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:18,562 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:18,562 INFO L82 PathProgramCache]: Analyzing trace with hash -54274277, now seen corresponding path program 71 times [2021-06-05 16:16:18,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:18,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255412805] [2021-06-05 16:16:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:18,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:18,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255412805] [2021-06-05 16:16:18,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255412805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:18,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200837863] [2021-06-05 16:16:18,708 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 [2021-06-05 16:16:18,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:16:18,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:16:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:18,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:18,894 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 53 treesize of output 35 [2021-06-05 16:16:18,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:18,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:18,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:16:18,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:39 [2021-06-05 16:16:18,941 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:16:18,941 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 44 treesize of output 40 [2021-06-05 16:16:18,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:16:18,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:18,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:18,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:26 [2021-06-05 16:16:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200837863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:19,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:19,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:16:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066918085] [2021-06-05 16:16:19,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:16:19,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:16:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:16:19,018 INFO L87 Difference]: Start difference. First operand 83045 states and 349299 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:21,218 INFO L93 Difference]: Finished difference Result 183018 states and 763108 transitions. [2021-06-05 16:16:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:16:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:16:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:22,199 INFO L225 Difference]: With dead ends: 183018 [2021-06-05 16:16:22,199 INFO L226 Difference]: Without dead ends: 182518 [2021-06-05 16:16:22,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:16:22,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182518 states. [2021-06-05 16:16:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182518 to 87651. [2021-06-05 16:16:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87651 states, 87650 states have (on average 4.207803764974329) internal successors, (368814), 87650 states have internal predecessors, (368814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87651 states to 87651 states and 368814 transitions. [2021-06-05 16:16:25,331 INFO L78 Accepts]: Start accepts. Automaton has 87651 states and 368814 transitions. Word has length 39 [2021-06-05 16:16:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:25,332 INFO L482 AbstractCegarLoop]: Abstraction has 87651 states and 368814 transitions. [2021-06-05 16:16:25,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 87651 states and 368814 transitions. [2021-06-05 16:16:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:25,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:25,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:25,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 16:16:25,713 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash 565573799, now seen corresponding path program 72 times [2021-06-05 16:16:25,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:25,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78834288] [2021-06-05 16:16:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:25,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:25,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78834288] [2021-06-05 16:16:25,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78834288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:25,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341547839] [2021-06-05 16:16:25,840 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 [2021-06-05 16:16:25,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:16:25,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:16:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:26,003 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:16:26,003 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 52 treesize of output 48 [2021-06-05 16:16:26,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:26,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:26,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:26,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:53 [2021-06-05 16:16:26,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:26,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:26,111 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 16:16:26,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:16:26,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:26,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:16:26,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:27 [2021-06-05 16:16:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:26,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341547839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:26,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:26,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:16:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406465320] [2021-06-05 16:16:26,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:16:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:16:26,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:16:26,156 INFO L87 Difference]: Start difference. First operand 87651 states and 368814 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:16:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:28,315 INFO L93 Difference]: Finished difference Result 162263 states and 682387 transitions. [2021-06-05 16:16:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:16:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 16:16:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:29,269 INFO L225 Difference]: With dead ends: 162263 [2021-06-05 16:16:29,269 INFO L226 Difference]: Without dead ends: 162176 [2021-06-05 16:16:29,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 838.2ms TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:16:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162176 states. [2021-06-05 16:16:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162176 to 89799. [2021-06-05 16:16:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89799 states, 89798 states have (on average 4.207643822802289) internal successors, (377838), 89798 states have internal predecessors, (377838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89799 states to 89799 states and 377838 transitions. [2021-06-05 16:16:32,135 INFO L78 Accepts]: Start accepts. Automaton has 89799 states and 377838 transitions. Word has length 39 [2021-06-05 16:16:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:32,135 INFO L482 AbstractCegarLoop]: Abstraction has 89799 states and 377838 transitions. [2021-06-05 16:16:32,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:16:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 89799 states and 377838 transitions. [2021-06-05 16:16:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:32,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:32,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:32,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:32,589 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1074988299, now seen corresponding path program 73 times [2021-06-05 16:16:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:32,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487353814] [2021-06-05 16:16:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:32,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487353814] [2021-06-05 16:16:32,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487353814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207945300] [2021-06-05 16:16:32,709 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 [2021-06-05 16:16:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:16:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:32,900 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:16:32,900 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 57 treesize of output 39 [2021-06-05 16:16:32,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:32,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:32,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:16:32,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:16:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:32,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:32,937 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 50 treesize of output 14 [2021-06-05 16:16:32,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:32,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:32,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:32,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:16:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:32,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207945300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:32,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:32,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:16:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169837849] [2021-06-05 16:16:32,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:16:32,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:16:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:16:32,959 INFO L87 Difference]: Start difference. First operand 89799 states and 377838 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:16:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:34,273 INFO L93 Difference]: Finished difference Result 118556 states and 499351 transitions. [2021-06-05 16:16:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:16:34,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-06-05 16:16:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:34,654 INFO L225 Difference]: With dead ends: 118556 [2021-06-05 16:16:34,654 INFO L226 Difference]: Without dead ends: 118405 [2021-06-05 16:16:34,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:16:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118405 states. [2021-06-05 16:16:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118405 to 89049. [2021-06-05 16:16:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89049 states, 89048 states have (on average 4.206809810439314) internal successors, (374608), 89048 states have internal predecessors, (374608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89049 states to 89049 states and 374608 transitions. [2021-06-05 16:16:37,285 INFO L78 Accepts]: Start accepts. Automaton has 89049 states and 374608 transitions. Word has length 39 [2021-06-05 16:16:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:37,286 INFO L482 AbstractCegarLoop]: Abstraction has 89049 states and 374608 transitions. [2021-06-05 16:16:37,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:16:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 89049 states and 374608 transitions. [2021-06-05 16:16:37,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:37,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:37,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:37,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 16:16:37,706 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:37,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1683346997, now seen corresponding path program 74 times [2021-06-05 16:16:37,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:37,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383005610] [2021-06-05 16:16:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:37,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:37,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383005610] [2021-06-05 16:16:37,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383005610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:37,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827350137] [2021-06-05 16:16:37,863 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 [2021-06-05 16:16:37,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:16:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:16:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:37,993 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:16:37,993 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 49 treesize of output 31 [2021-06-05 16:16:37,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:38,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:38,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:38,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 16:16:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:38,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:38,048 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 50 treesize of output 14 [2021-06-05 16:16:38,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:38,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:38,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:38,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:16:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:38,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827350137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:38,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:38,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:16:38,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840030517] [2021-06-05 16:16:38,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:16:38,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:16:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:16:38,073 INFO L87 Difference]: Start difference. First operand 89049 states and 374608 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:39,545 INFO L93 Difference]: Finished difference Result 130159 states and 547824 transitions. [2021-06-05 16:16:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:16:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:16:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:39,958 INFO L225 Difference]: With dead ends: 130159 [2021-06-05 16:16:39,958 INFO L226 Difference]: Without dead ends: 129920 [2021-06-05 16:16:39,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:16:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129920 states. [2021-06-05 16:16:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129920 to 89337. [2021-06-05 16:16:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89337 states, 89336 states have (on average 4.205426703680487) internal successors, (375696), 89336 states have internal predecessors, (375696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89337 states to 89337 states and 375696 transitions. [2021-06-05 16:16:42,554 INFO L78 Accepts]: Start accepts. Automaton has 89337 states and 375696 transitions. Word has length 39 [2021-06-05 16:16:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:42,555 INFO L482 AbstractCegarLoop]: Abstraction has 89337 states and 375696 transitions. [2021-06-05 16:16:42,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 89337 states and 375696 transitions. [2021-06-05 16:16:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:42,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:42,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:42,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 16:16:42,927 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1721790817, now seen corresponding path program 75 times [2021-06-05 16:16:42,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:42,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96998236] [2021-06-05 16:16:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:43,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:43,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96998236] [2021-06-05 16:16:43,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96998236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:43,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83340548] [2021-06-05 16:16:43,063 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 [2021-06-05 16:16:43,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:16:43,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:16:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:43,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:43,264 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2021-06-05 16:16:43,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:43,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:43,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:43,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:42 [2021-06-05 16:16:43,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:43,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 16:16:43,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:43,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:43,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:43,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-06-05 16:16:43,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:16:43,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:43,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:16:43,340 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:40 [2021-06-05 16:16:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:43,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83340548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:43,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:43,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:16:43,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523684869] [2021-06-05 16:16:43,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:16:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:16:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:16:43,405 INFO L87 Difference]: Start difference. First operand 89337 states and 375696 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:45,452 INFO L93 Difference]: Finished difference Result 181486 states and 762774 transitions. [2021-06-05 16:16:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:16:45,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:16:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:46,484 INFO L225 Difference]: With dead ends: 181486 [2021-06-05 16:16:46,484 INFO L226 Difference]: Without dead ends: 181312 [2021-06-05 16:16:46,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:16:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181312 states. [2021-06-05 16:16:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181312 to 92506. [2021-06-05 16:16:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92506 states, 92505 states have (on average 4.214788389816767) internal successors, (389889), 92505 states have internal predecessors, (389889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92506 states to 92506 states and 389889 transitions. [2021-06-05 16:16:49,706 INFO L78 Accepts]: Start accepts. Automaton has 92506 states and 389889 transitions. Word has length 39 [2021-06-05 16:16:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:49,706 INFO L482 AbstractCegarLoop]: Abstraction has 92506 states and 389889 transitions. [2021-06-05 16:16:49,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 92506 states and 389889 transitions. [2021-06-05 16:16:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:49,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:49,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:50,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 16:16:50,092 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:50,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1096998499, now seen corresponding path program 76 times [2021-06-05 16:16:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:50,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691116586] [2021-06-05 16:16:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:50,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:50,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691116586] [2021-06-05 16:16:50,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691116586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:50,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611207364] [2021-06-05 16:16:50,198 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 [2021-06-05 16:16:50,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:16:50,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:50,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:16:50,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:50,334 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 58 treesize of output 30 [2021-06-05 16:16:50,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:50,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:50,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:50,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:28 [2021-06-05 16:16:50,391 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:16:50,391 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 32 treesize of output 14 [2021-06-05 16:16:50,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:50,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:50,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:50,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:16:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:50,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611207364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:50,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:50,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:16:50,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6931278] [2021-06-05 16:16:50,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:16:50,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:16:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:16:50,408 INFO L87 Difference]: Start difference. First operand 92506 states and 389889 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 16:16:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:51,766 INFO L93 Difference]: Finished difference Result 124553 states and 527785 transitions. [2021-06-05 16:16:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:16:51,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 39 [2021-06-05 16:16:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:52,175 INFO L225 Difference]: With dead ends: 124553 [2021-06-05 16:16:52,175 INFO L226 Difference]: Without dead ends: 124498 [2021-06-05 16:16:52,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:16:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124498 states. [2021-06-05 16:16:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124498 to 93599. [2021-06-05 16:16:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93599 states, 93598 states have (on average 4.2167567683070155) internal successors, (394680), 93598 states have internal predecessors, (394680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93599 states to 93599 states and 394680 transitions. [2021-06-05 16:16:54,831 INFO L78 Accepts]: Start accepts. Automaton has 93599 states and 394680 transitions. Word has length 39 [2021-06-05 16:16:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:54,831 INFO L482 AbstractCegarLoop]: Abstraction has 93599 states and 394680 transitions. [2021-06-05 16:16:54,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 16:16:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 93599 states and 394680 transitions. [2021-06-05 16:16:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:16:55,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:55,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:55,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:55,231 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:55,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1962556623, now seen corresponding path program 77 times [2021-06-05 16:16:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:55,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651405732] [2021-06-05 16:16:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:55,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651405732] [2021-06-05 16:16:55,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651405732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715373569] [2021-06-05 16:16:55,340 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 [2021-06-05 16:16:55,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:16:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:55,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:16:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:55,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:55,585 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2021-06-05 16:16:55,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:55,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:55,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:16:55,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2021-06-05 16:16:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:56,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:16:56,044 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:16:56,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:56,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:56,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 16:16:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715373569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:56,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:56,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:16:56,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132661992] [2021-06-05 16:16:56,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:16:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:16:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:16:56,064 INFO L87 Difference]: Start difference. First operand 93599 states and 394680 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:59,446 INFO L93 Difference]: Finished difference Result 149789 states and 630787 transitions. [2021-06-05 16:16:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:16:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:16:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:00,067 INFO L225 Difference]: With dead ends: 149789 [2021-06-05 16:17:00,068 INFO L226 Difference]: Without dead ends: 149250 [2021-06-05 16:17:00,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 965.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:17:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149250 states. [2021-06-05 16:17:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149250 to 108735. [2021-06-05 16:17:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108735 states, 108734 states have (on average 4.2187908106020195) internal successors, (458726), 108734 states have internal predecessors, (458726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108735 states to 108735 states and 458726 transitions. [2021-06-05 16:17:03,294 INFO L78 Accepts]: Start accepts. Automaton has 108735 states and 458726 transitions. Word has length 39 [2021-06-05 16:17:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:03,295 INFO L482 AbstractCegarLoop]: Abstraction has 108735 states and 458726 transitions. [2021-06-05 16:17:03,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 108735 states and 458726 transitions. [2021-06-05 16:17:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:04,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:04,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:04,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 16:17:04,277 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash -59728409, now seen corresponding path program 78 times [2021-06-05 16:17:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:04,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568545090] [2021-06-05 16:17:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:04,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:04,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568545090] [2021-06-05 16:17:04,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568545090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:04,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866280393] [2021-06-05 16:17:04,382 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 [2021-06-05 16:17:04,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:17:04,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:17:04,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:04,616 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:17:04,617 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 53 treesize of output 35 [2021-06-05 16:17:04,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:04,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:04,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:17:04,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:36 [2021-06-05 16:17:04,662 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:17:04,662 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 44 treesize of output 40 [2021-06-05 16:17:04,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:17:04,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:04,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:17:04,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 16:17:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:04,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866280393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:04,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:04,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:17:04,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636473337] [2021-06-05 16:17:04,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:17:04,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:17:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:17:04,722 INFO L87 Difference]: Start difference. First operand 108735 states and 458726 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:06,709 INFO L93 Difference]: Finished difference Result 167353 states and 710562 transitions. [2021-06-05 16:17:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:17:06,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:17:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:07,287 INFO L225 Difference]: With dead ends: 167353 [2021-06-05 16:17:07,287 INFO L226 Difference]: Without dead ends: 167298 [2021-06-05 16:17:07,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:17:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167298 states. [2021-06-05 16:17:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167298 to 107032. [2021-06-05 16:17:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107032 states, 107031 states have (on average 4.211835823266156) internal successors, (450797), 107031 states have internal predecessors, (450797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107032 states to 107032 states and 450797 transitions. [2021-06-05 16:17:10,521 INFO L78 Accepts]: Start accepts. Automaton has 107032 states and 450797 transitions. Word has length 39 [2021-06-05 16:17:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:10,521 INFO L482 AbstractCegarLoop]: Abstraction has 107032 states and 450797 transitions. [2021-06-05 16:17:10,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 107032 states and 450797 transitions. [2021-06-05 16:17:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:11,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:11,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:11,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:17:11,479 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:11,480 INFO L82 PathProgramCache]: Analyzing trace with hash -425686603, now seen corresponding path program 79 times [2021-06-05 16:17:11,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:11,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324994536] [2021-06-05 16:17:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:11,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324994536] [2021-06-05 16:17:11,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324994536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007807350] [2021-06-05 16:17:11,582 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 [2021-06-05 16:17:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:17:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:11,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:17:11,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:11,768 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 68 treesize of output 40 [2021-06-05 16:17:11,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:11,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:11,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:11,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:36 [2021-06-05 16:17:11,804 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:17:11,804 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 32 treesize of output 14 [2021-06-05 16:17:11,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:11,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:11,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:11,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:17:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:11,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007807350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:11,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:11,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:17:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858258657] [2021-06-05 16:17:11,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:17:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:17:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:17:11,825 INFO L87 Difference]: Start difference. First operand 107032 states and 450797 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 16:17:13,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:13,324 INFO L93 Difference]: Finished difference Result 140247 states and 593014 transitions. [2021-06-05 16:17:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:17:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 39 [2021-06-05 16:17:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:13,776 INFO L225 Difference]: With dead ends: 140247 [2021-06-05 16:17:13,776 INFO L226 Difference]: Without dead ends: 140192 [2021-06-05 16:17:13,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:17:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140192 states. [2021-06-05 16:17:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140192 to 107696. [2021-06-05 16:17:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107696 states, 107695 states have (on average 4.213166813686801) internal successors, (453737), 107695 states have internal predecessors, (453737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107696 states to 107696 states and 453737 transitions. [2021-06-05 16:17:16,643 INFO L78 Accepts]: Start accepts. Automaton has 107696 states and 453737 transitions. Word has length 39 [2021-06-05 16:17:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:16,643 INFO L482 AbstractCegarLoop]: Abstraction has 107696 states and 453737 transitions. [2021-06-05 16:17:16,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 16:17:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 107696 states and 453737 transitions. [2021-06-05 16:17:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:16,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:16,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:17,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 16:17:17,071 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash 993306421, now seen corresponding path program 80 times [2021-06-05 16:17:17,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:17,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514585881] [2021-06-05 16:17:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:17,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:17,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514585881] [2021-06-05 16:17:17,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514585881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:17,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96017848] [2021-06-05 16:17:17,166 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) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:17:17,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:17:17,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:17:17,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:17,361 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:17:17,361 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 57 treesize of output 39 [2021-06-05 16:17:17,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:17,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:17,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:17:17,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:17:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:17:17,397 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 50 treesize of output 14 [2021-06-05 16:17:17,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:17,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:17,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:17,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:17:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:17,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96017848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:17,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:17,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:17:17,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453169111] [2021-06-05 16:17:17,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:17:17,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:17:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:17:17,847 INFO L87 Difference]: Start difference. First operand 107696 states and 453737 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:17:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:18,841 INFO L93 Difference]: Finished difference Result 139241 states and 588472 transitions. [2021-06-05 16:17:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:17:18,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-06-05 16:17:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:19,280 INFO L225 Difference]: With dead ends: 139241 [2021-06-05 16:17:19,281 INFO L226 Difference]: Without dead ends: 139186 [2021-06-05 16:17:19,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:17:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139186 states. [2021-06-05 16:17:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139186 to 107680. [2021-06-05 16:17:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107680 states, 107679 states have (on average 4.21316134065138) internal successors, (453669), 107679 states have internal predecessors, (453669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107680 states to 107680 states and 453669 transitions. [2021-06-05 16:17:22,646 INFO L78 Accepts]: Start accepts. Automaton has 107680 states and 453669 transitions. Word has length 39 [2021-06-05 16:17:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:22,646 INFO L482 AbstractCegarLoop]: Abstraction has 107680 states and 453669 transitions. [2021-06-05 16:17:22,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-06-05 16:17:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 107680 states and 453669 transitions. [2021-06-05 16:17:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:22,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:22,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:23,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:17:23,079 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1659013173, now seen corresponding path program 81 times [2021-06-05 16:17:23,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:23,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402314414] [2021-06-05 16:17:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:23,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:23,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402314414] [2021-06-05 16:17:23,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402314414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:23,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255593372] [2021-06-05 16:17:23,180 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 [2021-06-05 16:17:23,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:17:23,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:17:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:23,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:23,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:23,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 16:17:23,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:17:23,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:23,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:23,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:58 [2021-06-05 16:17:23,459 INFO L446 ElimStorePlain]: Different costs {1=[q1], 3=[v_prenex_3]} [2021-06-05 16:17:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:23,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 16:17:23,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:23,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:23,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:23,489 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:17:23,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:17:23,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:23,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:17:23,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:94, output treesize:32 [2021-06-05 16:17:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:23,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255593372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:23,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:23,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:17:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68877622] [2021-06-05 16:17:23,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:17:23,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:23,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:17:23,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:17:23,581 INFO L87 Difference]: Start difference. First operand 107680 states and 453669 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:17:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:27,071 INFO L93 Difference]: Finished difference Result 186239 states and 788096 transitions. [2021-06-05 16:17:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:17:27,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 39 [2021-06-05 16:17:27,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:27,710 INFO L225 Difference]: With dead ends: 186239 [2021-06-05 16:17:27,711 INFO L226 Difference]: Without dead ends: 186129 [2021-06-05 16:17:27,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1452.6ms TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:17:27,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186129 states. [2021-06-05 16:17:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186129 to 106111. [2021-06-05 16:17:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106111 states, 106110 states have (on average 4.214277636415041) internal successors, (447177), 106110 states have internal predecessors, (447177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106111 states to 106111 states and 447177 transitions. [2021-06-05 16:17:30,990 INFO L78 Accepts]: Start accepts. Automaton has 106111 states and 447177 transitions. Word has length 39 [2021-06-05 16:17:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:30,990 INFO L482 AbstractCegarLoop]: Abstraction has 106111 states and 447177 transitions. [2021-06-05 16:17:30,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:17:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 106111 states and 447177 transitions. [2021-06-05 16:17:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:31,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:31,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:31,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 16:17:31,982 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:31,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1057788085, now seen corresponding path program 82 times [2021-06-05 16:17:31,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:31,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918740395] [2021-06-05 16:17:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:32,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:32,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918740395] [2021-06-05 16:17:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918740395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:32,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598509718] [2021-06-05 16:17:32,109 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 [2021-06-05 16:17:32,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:17:32,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:17:32,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:32,230 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:17:32,230 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 49 treesize of output 31 [2021-06-05 16:17:32,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:32,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:32,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:32,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 16:17:32,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:17:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:32,282 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 50 treesize of output 14 [2021-06-05 16:17:32,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:32,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:32,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:32,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:17:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:32,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598509718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:32,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:32,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:17:32,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947126162] [2021-06-05 16:17:32,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:17:32,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:32,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:17:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:17:32,307 INFO L87 Difference]: Start difference. First operand 106111 states and 447177 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) [2021-06-05 16:17:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:33,712 INFO L93 Difference]: Finished difference Result 141727 states and 596671 transitions. [2021-06-05 16:17:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:17:33,712 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 39 [2021-06-05 16:17:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:34,177 INFO L225 Difference]: With dead ends: 141727 [2021-06-05 16:17:34,177 INFO L226 Difference]: Without dead ends: 141488 [2021-06-05 16:17:34,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:17:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141488 states. [2021-06-05 16:17:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141488 to 106719. [2021-06-05 16:17:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106719 states, 106718 states have (on average 4.213675293764876) internal successors, (449675), 106718 states have internal predecessors, (449675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106719 states to 106719 states and 449675 transitions. [2021-06-05 16:17:37,202 INFO L78 Accepts]: Start accepts. Automaton has 106719 states and 449675 transitions. Word has length 39 [2021-06-05 16:17:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:37,202 INFO L482 AbstractCegarLoop]: Abstraction has 106719 states and 449675 transitions. [2021-06-05 16:17:37,202 INFO L483 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) [2021-06-05 16:17:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 106719 states and 449675 transitions. [2021-06-05 16:17:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:37,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:37,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:37,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:17:37,640 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1096231905, now seen corresponding path program 83 times [2021-06-05 16:17:37,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:37,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964341311] [2021-06-05 16:17:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:37,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:37,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964341311] [2021-06-05 16:17:37,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964341311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:37,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275182475] [2021-06-05 16:17:37,755 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 [2021-06-05 16:17:37,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:17:37,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:17:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:37,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:37,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:37,949 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2021-06-05 16:17:37,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:17:37,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:37,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:37,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:53 [2021-06-05 16:17:38,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:38,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 16:17:38,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:38,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:38,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:38,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:38,027 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-06-05 16:17:38,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:17:38,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:38,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:17:38,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:38 [2021-06-05 16:17:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:17:38,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275182475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:38,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:38,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:17:38,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859719853] [2021-06-05 16:17:38,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:17:38,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:38,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:17:38,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:17:38,111 INFO L87 Difference]: Start difference. First operand 106719 states and 449675 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:38,822 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-06-05 16:17:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:41,926 INFO L93 Difference]: Finished difference Result 253091 states and 1068842 transitions. [2021-06-05 16:17:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:17:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:17:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:43,282 INFO L225 Difference]: With dead ends: 253091 [2021-06-05 16:17:43,283 INFO L226 Difference]: Without dead ends: 252972 [2021-06-05 16:17:43,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1948.5ms TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:17:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252972 states. [2021-06-05 16:17:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252972 to 115389. [2021-06-05 16:17:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115389 states, 115388 states have (on average 4.225335390161889) internal successors, (487553), 115388 states have internal predecessors, (487553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115389 states to 115389 states and 487553 transitions. [2021-06-05 16:17:47,853 INFO L78 Accepts]: Start accepts. Automaton has 115389 states and 487553 transitions. Word has length 39 [2021-06-05 16:17:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:47,853 INFO L482 AbstractCegarLoop]: Abstraction has 115389 states and 487553 transitions. [2021-06-05 16:17:47,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 115389 states and 487553 transitions. [2021-06-05 16:17:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:48,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:48,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:48,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 16:17:48,308 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash 217354315, now seen corresponding path program 84 times [2021-06-05 16:17:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:48,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337909320] [2021-06-05 16:17:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:48,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:48,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337909320] [2021-06-05 16:17:48,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337909320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:48,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637916369] [2021-06-05 16:17:48,424 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 [2021-06-05 16:17:48,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:17:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:17:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:17:48,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:48,546 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:17:48,546 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 39 treesize of output 21 [2021-06-05 16:17:48,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:48,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:48,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:48,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 16:17:48,623 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:17:48,624 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 44 treesize of output 40 [2021-06-05 16:17:48,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:17:48,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:48,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:17:48,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 16:17:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:48,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637916369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:48,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:48,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:17:48,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802282106] [2021-06-05 16:17:48,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:17:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:48,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:17:48,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:17:48,675 INFO L87 Difference]: Start difference. First operand 115389 states and 487553 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:17:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:50,475 INFO L93 Difference]: Finished difference Result 165278 states and 699762 transitions. [2021-06-05 16:17:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:17:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 39 [2021-06-05 16:17:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:51,015 INFO L225 Difference]: With dead ends: 165278 [2021-06-05 16:17:51,015 INFO L226 Difference]: Without dead ends: 165103 [2021-06-05 16:17:51,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:17:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165103 states. [2021-06-05 16:17:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165103 to 115539. [2021-06-05 16:17:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115539 states, 115538 states have (on average 4.2249736017587285) internal successors, (488145), 115538 states have internal predecessors, (488145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115539 states to 115539 states and 488145 transitions. [2021-06-05 16:17:55,211 INFO L78 Accepts]: Start accepts. Automaton has 115539 states and 488145 transitions. Word has length 39 [2021-06-05 16:17:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:17:55,212 INFO L482 AbstractCegarLoop]: Abstraction has 115539 states and 488145 transitions. [2021-06-05 16:17:55,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:17:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 115539 states and 488145 transitions. [2021-06-05 16:17:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:17:55,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:17:55,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:17:55,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 16:17:55,664 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:17:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:17:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1534191097, now seen corresponding path program 85 times [2021-06-05 16:17:55,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:17:55,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465639700] [2021-06-05 16:17:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:17:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:55,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:17:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465639700] [2021-06-05 16:17:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465639700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395766886] [2021-06-05 16:17:55,780 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 [2021-06-05 16:17:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:17:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:17:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:17:55,878 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:17:55,878 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 39 treesize of output 21 [2021-06-05 16:17:55,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:55,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:55,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:55,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:30 [2021-06-05 16:17:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:17:58,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:17:58,096 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 50 treesize of output 14 [2021-06-05 16:17:58,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:17:58,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:17:58,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:17:58,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:17:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:17:58,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395766886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:17:58,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:17:58,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:17:58,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434850788] [2021-06-05 16:17:58,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:17:58,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:17:58,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:17:58,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-06-05 16:17:58,126 INFO L87 Difference]: Start difference. First operand 115539 states and 488145 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:17:59,473 INFO L93 Difference]: Finished difference Result 141717 states and 599894 transitions. [2021-06-05 16:17:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:17:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:17:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:17:59,946 INFO L225 Difference]: With dead ends: 141717 [2021-06-05 16:17:59,946 INFO L226 Difference]: Without dead ends: 141662 [2021-06-05 16:17:59,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2306.8ms TimeCoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-06-05 16:18:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141662 states. [2021-06-05 16:18:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141662 to 115539. [2021-06-05 16:18:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115539 states, 115538 states have (on average 4.2249736017587285) internal successors, (488145), 115538 states have internal predecessors, (488145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115539 states to 115539 states and 488145 transitions. [2021-06-05 16:18:02,937 INFO L78 Accepts]: Start accepts. Automaton has 115539 states and 488145 transitions. Word has length 39 [2021-06-05 16:18:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:02,937 INFO L482 AbstractCegarLoop]: Abstraction has 115539 states and 488145 transitions. [2021-06-05 16:18:02,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 115539 states and 488145 transitions. [2021-06-05 16:18:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:03,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:03,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:03,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:18:03,988 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1599489633, now seen corresponding path program 86 times [2021-06-05 16:18:03,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:03,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542297118] [2021-06-05 16:18:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:04,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:04,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542297118] [2021-06-05 16:18:04,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542297118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:04,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353667169] [2021-06-05 16:18:04,106 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 [2021-06-05 16:18:04,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:18:04,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:18:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:18:04,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:18:04,283 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 68 treesize of output 40 [2021-06-05 16:18:04,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:04,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:04,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:04,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:36 [2021-06-05 16:18:04,315 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:18:04,316 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 32 treesize of output 14 [2021-06-05 16:18:04,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:04,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:04,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:04,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:18:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:04,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353667169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:04,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:04,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:18:04,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223389143] [2021-06-05 16:18:04,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:18:04,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:04,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:18:04,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:18:04,345 INFO L87 Difference]: Start difference. First operand 115539 states and 488145 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:05,822 INFO L93 Difference]: Finished difference Result 146932 states and 622127 transitions. [2021-06-05 16:18:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:18:05,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:18:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:06,322 INFO L225 Difference]: With dead ends: 146932 [2021-06-05 16:18:06,323 INFO L226 Difference]: Without dead ends: 146877 [2021-06-05 16:18:06,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:18:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146877 states. [2021-06-05 16:18:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146877 to 116071. [2021-06-05 16:18:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116071 states, 116070 states have (on average 4.226113552166796) internal successors, (490525), 116070 states have internal predecessors, (490525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116071 states to 116071 states and 490525 transitions. [2021-06-05 16:18:09,464 INFO L78 Accepts]: Start accepts. Automaton has 116071 states and 490525 transitions. Word has length 39 [2021-06-05 16:18:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:09,464 INFO L482 AbstractCegarLoop]: Abstraction has 116071 states and 490525 transitions. [2021-06-05 16:18:09,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 116071 states and 490525 transitions. [2021-06-05 16:18:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:09,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:09,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:09,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:18:09,923 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2136982489, now seen corresponding path program 87 times [2021-06-05 16:18:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:09,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671828805] [2021-06-05 16:18:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:10,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:10,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671828805] [2021-06-05 16:18:10,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671828805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:10,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562571625] [2021-06-05 16:18:10,031 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 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 [2021-06-05 16:18:10,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:18:10,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:18:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:18:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:10,641 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 16:18:10,761 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:18:10,762 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 49 treesize of output 53 [2021-06-05 16:18:10,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:18:10,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:10,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:18:10,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:56 [2021-06-05 16:18:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:10,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:10,852 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:18:10,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:18:10,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 16:18:10,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:10,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:10,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:18:10,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:32 [2021-06-05 16:18:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:10,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562571625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:10,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:18:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333570215] [2021-06-05 16:18:10,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:18:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:18:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:18:10,954 INFO L87 Difference]: Start difference. First operand 116071 states and 490525 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:13,089 INFO L93 Difference]: Finished difference Result 176853 states and 746682 transitions. [2021-06-05 16:18:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:18:13,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:18:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:13,648 INFO L225 Difference]: With dead ends: 176853 [2021-06-05 16:18:13,648 INFO L226 Difference]: Without dead ends: 176743 [2021-06-05 16:18:13,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1321.8ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:18:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176743 states. [2021-06-05 16:18:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176743 to 116698. [2021-06-05 16:18:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116698 states, 116697 states have (on average 4.226209756891779) internal successors, (493186), 116697 states have internal predecessors, (493186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116698 states to 116698 states and 493186 transitions. [2021-06-05 16:18:17,437 INFO L78 Accepts]: Start accepts. Automaton has 116698 states and 493186 transitions. Word has length 39 [2021-06-05 16:18:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:17,437 INFO L482 AbstractCegarLoop]: Abstraction has 116698 states and 493186 transitions. [2021-06-05 16:18:17,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 116698 states and 493186 transitions. [2021-06-05 16:18:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:17,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:17,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:17,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 16:18:17,895 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1799811683, now seen corresponding path program 88 times [2021-06-05 16:18:17,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:17,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330711541] [2021-06-05 16:18:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:18,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:18,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330711541] [2021-06-05 16:18:18,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330711541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:18,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625316072] [2021-06-05 16:18:18,009 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 [2021-06-05 16:18:18,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:18:18,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:18:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:18:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:18,149 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:18:18,150 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 47 treesize of output 29 [2021-06-05 16:18:18,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:18,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:18,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:18:18,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:42 [2021-06-05 16:18:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:18,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:18:18,215 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 50 treesize of output 14 [2021-06-05 16:18:18,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:18,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:18,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:18,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:18:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:18,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625316072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:18,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:18,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:18:18,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855750514] [2021-06-05 16:18:18,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:18:18,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:18,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:18:18,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:18:18,246 INFO L87 Difference]: Start difference. First operand 116698 states and 493186 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:19,723 INFO L93 Difference]: Finished difference Result 143374 states and 607141 transitions. [2021-06-05 16:18:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:18:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:18:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:20,181 INFO L225 Difference]: With dead ends: 143374 [2021-06-05 16:18:20,181 INFO L226 Difference]: Without dead ends: 143319 [2021-06-05 16:18:20,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:18:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143319 states. [2021-06-05 16:18:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143319 to 116182. [2021-06-05 16:18:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116182 states, 116181 states have (on average 4.225079832330588) internal successors, (490874), 116181 states have internal predecessors, (490874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116182 states to 116182 states and 490874 transitions. [2021-06-05 16:18:23,209 INFO L78 Accepts]: Start accepts. Automaton has 116182 states and 490874 transitions. Word has length 39 [2021-06-05 16:18:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:23,209 INFO L482 AbstractCegarLoop]: Abstraction has 116182 states and 490874 transitions. [2021-06-05 16:18:23,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 116182 states and 490874 transitions. [2021-06-05 16:18:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:23,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:23,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:24,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 16:18:24,165 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1873572973, now seen corresponding path program 89 times [2021-06-05 16:18:24,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:24,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086585341] [2021-06-05 16:18:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086585341] [2021-06-05 16:18:24,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086585341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:24,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984889772] [2021-06-05 16:18:24,348 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 [2021-06-05 16:18:24,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:18:24,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:18:24,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:18:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:24,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:18:24,516 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 29 treesize of output 17 [2021-06-05 16:18:24,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:24,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:24,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:24,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:29 [2021-06-05 16:18:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:24,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:18:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:18:24,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:18:24,588 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:18:24,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:24,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:24,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 16:18:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:24,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984889772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:24,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:24,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:18:24,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716022791] [2021-06-05 16:18:24,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:18:24,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:18:24,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:18:24,613 INFO L87 Difference]: Start difference. First operand 116182 states and 490874 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:18:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:26,409 INFO L93 Difference]: Finished difference Result 169461 states and 708390 transitions. [2021-06-05 16:18:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:18:26,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:18:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:26,955 INFO L225 Difference]: With dead ends: 169461 [2021-06-05 16:18:26,955 INFO L226 Difference]: Without dead ends: 168601 [2021-06-05 16:18:26,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:18:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168601 states. [2021-06-05 16:18:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168601 to 117650. [2021-06-05 16:18:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117650 states, 117649 states have (on average 4.223520811906604) internal successors, (496893), 117649 states have internal predecessors, (496893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117650 states to 117650 states and 496893 transitions. [2021-06-05 16:18:30,803 INFO L78 Accepts]: Start accepts. Automaton has 117650 states and 496893 transitions. Word has length 39 [2021-06-05 16:18:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:30,803 INFO L482 AbstractCegarLoop]: Abstraction has 117650 states and 496893 transitions. [2021-06-05 16:18:30,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:18:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 117650 states and 496893 transitions. [2021-06-05 16:18:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:31,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:31,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:31,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 16:18:31,346 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash 913413037, now seen corresponding path program 90 times [2021-06-05 16:18:31,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:31,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518213918] [2021-06-05 16:18:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:31,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:31,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518213918] [2021-06-05 16:18:31,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518213918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:31,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713209141] [2021-06-05 16:18:31,526 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 [2021-06-05 16:18:31,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:18:31,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:18:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:18:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:31,710 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:18:31,710 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 45 treesize of output 27 [2021-06-05 16:18:31,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:31,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:31,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:18:31,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:32 [2021-06-05 16:18:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:31,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:31,783 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-06-05 16:18:31,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:18:31,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:31,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:18:31,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:21 [2021-06-05 16:18:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:31,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713209141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:31,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:31,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:18:31,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490608038] [2021-06-05 16:18:31,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:18:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:18:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:18:31,851 INFO L87 Difference]: Start difference. First operand 117650 states and 496893 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:33,992 INFO L93 Difference]: Finished difference Result 180970 states and 759882 transitions. [2021-06-05 16:18:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:18:33,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:18:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:34,579 INFO L225 Difference]: With dead ends: 180970 [2021-06-05 16:18:34,579 INFO L226 Difference]: Without dead ends: 180519 [2021-06-05 16:18:34,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:18:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180519 states. [2021-06-05 16:18:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180519 to 117746. [2021-06-05 16:18:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117746 states, 117745 states have (on average 4.223576372669752) internal successors, (497305), 117745 states have internal predecessors, (497305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117746 states to 117746 states and 497305 transitions. [2021-06-05 16:18:38,550 INFO L78 Accepts]: Start accepts. Automaton has 117746 states and 497305 transitions. Word has length 39 [2021-06-05 16:18:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:38,550 INFO L482 AbstractCegarLoop]: Abstraction has 117746 states and 497305 transitions. [2021-06-05 16:18:38,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 117746 states and 497305 transitions. [2021-06-05 16:18:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:38,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:38,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:38,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 16:18:38,986 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:38,987 INFO L82 PathProgramCache]: Analyzing trace with hash -205612563, now seen corresponding path program 91 times [2021-06-05 16:18:38,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:38,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902107431] [2021-06-05 16:18:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:39,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:39,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902107431] [2021-06-05 16:18:39,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902107431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:39,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077531893] [2021-06-05 16:18:39,162 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 [2021-06-05 16:18:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:39,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:18:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:39,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:18:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:39,316 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 47 treesize of output 27 [2021-06-05 16:18:39,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:39,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:39,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:39,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:38 [2021-06-05 16:18:39,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:39,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:18:39,411 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 50 treesize of output 14 [2021-06-05 16:18:39,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:39,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:39,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:39,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:18:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:39,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077531893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:39,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:39,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:18:39,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511494996] [2021-06-05 16:18:39,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:18:39,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:18:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:18:39,437 INFO L87 Difference]: Start difference. First operand 117746 states and 497305 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:41,211 INFO L93 Difference]: Finished difference Result 155617 states and 650444 transitions. [2021-06-05 16:18:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:18:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:18:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:41,804 INFO L225 Difference]: With dead ends: 155617 [2021-06-05 16:18:41,804 INFO L226 Difference]: Without dead ends: 155425 [2021-06-05 16:18:41,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:18:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155425 states. [2021-06-05 16:18:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155425 to 118594. [2021-06-05 16:18:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118594 states, 118593 states have (on average 4.222070442606225) internal successors, (500708), 118593 states have internal predecessors, (500708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118594 states to 118594 states and 500708 transitions. [2021-06-05 16:18:45,496 INFO L78 Accepts]: Start accepts. Automaton has 118594 states and 500708 transitions. Word has length 39 [2021-06-05 16:18:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:45,496 INFO L482 AbstractCegarLoop]: Abstraction has 118594 states and 500708 transitions. [2021-06-05 16:18:45,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 118594 states and 500708 transitions. [2021-06-05 16:18:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:45,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:45,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:46,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:18:46,057 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash -600793637, now seen corresponding path program 92 times [2021-06-05 16:18:46,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:46,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443940654] [2021-06-05 16:18:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:46,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443940654] [2021-06-05 16:18:46,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443940654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873895948] [2021-06-05 16:18:46,207 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 [2021-06-05 16:18:46,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:18:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:18:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:18:46,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:46,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:46,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:46,452 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 54 [2021-06-05 16:18:46,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:46,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:46,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:18:46,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:86, output treesize:46 [2021-06-05 16:18:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:46,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:46,556 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:18:46,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:18:46,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:46,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:18:46,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:22 [2021-06-05 16:18:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:46,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873895948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:46,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:46,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:18:46,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483504792] [2021-06-05 16:18:46,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:18:46,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:46,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:18:46,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:18:46,624 INFO L87 Difference]: Start difference. First operand 118594 states and 500708 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 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) [2021-06-05 16:18:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:49,359 INFO L93 Difference]: Finished difference Result 191060 states and 801497 transitions. [2021-06-05 16:18:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:18:49,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 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 39 [2021-06-05 16:18:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:50,383 INFO L225 Difference]: With dead ends: 191060 [2021-06-05 16:18:50,383 INFO L226 Difference]: Without dead ends: 190427 [2021-06-05 16:18:50,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:18:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190427 states. [2021-06-05 16:18:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190427 to 122306. [2021-06-05 16:18:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122306 states, 122305 states have (on average 4.215657577368055) internal successors, (515596), 122305 states have internal predecessors, (515596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:18:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122306 states to 122306 states and 515596 transitions. [2021-06-05 16:18:53,856 INFO L78 Accepts]: Start accepts. Automaton has 122306 states and 515596 transitions. Word has length 39 [2021-06-05 16:18:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:18:53,856 INFO L482 AbstractCegarLoop]: Abstraction has 122306 states and 515596 transitions. [2021-06-05 16:18:53,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 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) [2021-06-05 16:18:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 122306 states and 515596 transitions. [2021-06-05 16:18:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:18:54,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:18:54,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:18:54,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:18:54,898 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:18:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:18:54,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1945473573, now seen corresponding path program 93 times [2021-06-05 16:18:54,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:18:54,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108890390] [2021-06-05 16:18:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:18:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:18:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:55,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:18:55,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108890390] [2021-06-05 16:18:55,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108890390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:55,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306693665] [2021-06-05 16:18:55,044 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 [2021-06-05 16:18:55,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:18:55,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:18:55,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:18:55,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:18:55,245 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:18:55,245 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 64 treesize of output 60 [2021-06-05 16:18:55,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:55,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:55,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:18:55,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:58 [2021-06-05 16:18:55,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:55,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 16:18:55,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:18:55,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:18:55,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:55,321 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 16:18:55,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:18:55,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:18:55,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:18:55,343 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:82, output treesize:41 [2021-06-05 16:18:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:18:55,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306693665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:18:55,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:18:55,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:18:55,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147337232] [2021-06-05 16:18:55,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:18:55,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:18:55,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:18:55,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:18:55,423 INFO L87 Difference]: Start difference. First operand 122306 states and 515596 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2021-06-05 16:18:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:18:58,089 INFO L93 Difference]: Finished difference Result 203137 states and 855397 transitions. [2021-06-05 16:18:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:18:58,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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 39 [2021-06-05 16:18:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:18:58,786 INFO L225 Difference]: With dead ends: 203137 [2021-06-05 16:18:58,786 INFO L226 Difference]: Without dead ends: 202974 [2021-06-05 16:18:58,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1133.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:18:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202974 states. [2021-06-05 16:19:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202974 to 123310. [2021-06-05 16:19:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123310 states, 123309 states have (on average 4.216237257621098) internal successors, (519900), 123309 states have internal predecessors, (519900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123310 states to 123310 states and 519900 transitions. [2021-06-05 16:19:02,801 INFO L78 Accepts]: Start accepts. Automaton has 123310 states and 519900 transitions. Word has length 39 [2021-06-05 16:19:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:02,801 INFO L482 AbstractCegarLoop]: Abstraction has 123310 states and 519900 transitions. [2021-06-05 16:19:02,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2021-06-05 16:19:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 123310 states and 519900 transitions. [2021-06-05 16:19:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:03,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:03,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:03,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 16:19:03,857 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:03,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1500871251, now seen corresponding path program 94 times [2021-06-05 16:19:03,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:03,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062888236] [2021-06-05 16:19:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:03,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062888236] [2021-06-05 16:19:03,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062888236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672754663] [2021-06-05 16:19:03,999 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 [2021-06-05 16:19:04,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:19:04,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:19:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:19:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:04,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:04,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:04,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:04,228 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 59 treesize of output 39 [2021-06-05 16:19:04,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:04,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:04,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:19:04,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:52 [2021-06-05 16:19:04,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:04,269 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 50 treesize of output 14 [2021-06-05 16:19:04,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:04,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:04,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:04,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:19:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672754663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:04,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:04,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:19:04,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573445119] [2021-06-05 16:19:04,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:19:04,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:19:04,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:19:04,296 INFO L87 Difference]: Start difference. First operand 123310 states and 519900 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:05,980 INFO L93 Difference]: Finished difference Result 170672 states and 718545 transitions. [2021-06-05 16:19:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:19:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:19:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:06,519 INFO L225 Difference]: With dead ends: 170672 [2021-06-05 16:19:06,519 INFO L226 Difference]: Without dead ends: 170582 [2021-06-05 16:19:06,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:19:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170582 states. [2021-06-05 16:19:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170582 to 124128. [2021-06-05 16:19:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124128 states, 124127 states have (on average 4.217583603889564) internal successors, (523516), 124127 states have internal predecessors, (523516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124128 states to 124128 states and 523516 transitions. [2021-06-05 16:19:10,471 INFO L78 Accepts]: Start accepts. Automaton has 124128 states and 523516 transitions. Word has length 39 [2021-06-05 16:19:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:10,471 INFO L482 AbstractCegarLoop]: Abstraction has 124128 states and 523516 transitions. [2021-06-05 16:19:10,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 124128 states and 523516 transitions. [2021-06-05 16:19:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:10,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:10,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:10,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 16:19:10,972 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1212222615, now seen corresponding path program 95 times [2021-06-05 16:19:10,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99334386] [2021-06-05 16:19:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:11,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99334386] [2021-06-05 16:19:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99334386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180027176] [2021-06-05 16:19:11,131 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 [2021-06-05 16:19:11,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:19:11,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:19:11,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:19:11,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:11,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:11,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:11,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:11,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 16:19:11,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:11,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:11,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:11,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:19 [2021-06-05 16:19:11,349 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:19:11,349 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 21 treesize of output 9 [2021-06-05 16:19:11,350 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:19:11,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:11,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:19:11,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:7 [2021-06-05 16:19:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:11,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180027176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:11,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:11,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:19:11,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087463008] [2021-06-05 16:19:11,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:19:11,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:19:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:19:11,373 INFO L87 Difference]: Start difference. First operand 124128 states and 523516 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:19:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:13,028 INFO L93 Difference]: Finished difference Result 157703 states and 663316 transitions. [2021-06-05 16:19:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:19:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 39 [2021-06-05 16:19:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:13,576 INFO L225 Difference]: With dead ends: 157703 [2021-06-05 16:19:13,577 INFO L226 Difference]: Without dead ends: 157613 [2021-06-05 16:19:13,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:19:13,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157613 states. [2021-06-05 16:19:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157613 to 124402. [2021-06-05 16:19:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124402 states, 124401 states have (on average 4.217924293213077) internal successors, (524714), 124401 states have internal predecessors, (524714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124402 states to 124402 states and 524714 transitions. [2021-06-05 16:19:17,373 INFO L78 Accepts]: Start accepts. Automaton has 124402 states and 524714 transitions. Word has length 39 [2021-06-05 16:19:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:17,373 INFO L482 AbstractCegarLoop]: Abstraction has 124402 states and 524714 transitions. [2021-06-05 16:19:17,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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) [2021-06-05 16:19:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 124402 states and 524714 transitions. [2021-06-05 16:19:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:17,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:17,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:17,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:19:17,854 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:17,855 INFO L82 PathProgramCache]: Analyzing trace with hash -721998227, now seen corresponding path program 96 times [2021-06-05 16:19:17,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:17,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299100815] [2021-06-05 16:19:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:18,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299100815] [2021-06-05 16:19:18,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299100815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993328651] [2021-06-05 16:19:18,012 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 [2021-06-05 16:19:18,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:19:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:19:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:19:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:18,157 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:19:18,157 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 45 treesize of output 27 [2021-06-05 16:19:18,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:18,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:18,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:19:18,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:24 [2021-06-05 16:19:18,216 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:19:18,216 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 44 treesize of output 40 [2021-06-05 16:19:18,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:19:18,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:18,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:19:18,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 16:19:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:18,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993328651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:18,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:18,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:19:18,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411002911] [2021-06-05 16:19:18,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:19:18,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:18,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:19:18,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:19:18,292 INFO L87 Difference]: Start difference. First operand 124402 states and 524714 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:20,414 INFO L93 Difference]: Finished difference Result 186267 states and 781942 transitions. [2021-06-05 16:19:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:19:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:19:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:21,385 INFO L225 Difference]: With dead ends: 186267 [2021-06-05 16:19:21,385 INFO L226 Difference]: Without dead ends: 185816 [2021-06-05 16:19:21,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1103.3ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:19:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185816 states. [2021-06-05 16:19:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185816 to 124342. [2021-06-05 16:19:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124342 states, 124341 states have (on average 4.217981196869898) internal successors, (524468), 124341 states have internal predecessors, (524468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124342 states to 124342 states and 524468 transitions. [2021-06-05 16:19:24,793 INFO L78 Accepts]: Start accepts. Automaton has 124342 states and 524468 transitions. Word has length 39 [2021-06-05 16:19:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:24,793 INFO L482 AbstractCegarLoop]: Abstraction has 124342 states and 524468 transitions. [2021-06-05 16:19:24,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 124342 states and 524468 transitions. [2021-06-05 16:19:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:25,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:25,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:25,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 16:19:25,241 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash 77620905, now seen corresponding path program 97 times [2021-06-05 16:19:25,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:25,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945878172] [2021-06-05 16:19:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945878172] [2021-06-05 16:19:25,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945878172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282570064] [2021-06-05 16:19:25,378 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 [2021-06-05 16:19:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:19:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:25,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:25,511 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 41 treesize of output 21 [2021-06-05 16:19:25,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:25,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:25,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:25,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:30 [2021-06-05 16:19:26,018 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 16:19:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:26,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:26,052 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 50 treesize of output 14 [2021-06-05 16:19:26,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:26,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:26,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:26,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:19:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:26,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282570064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:26,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:26,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:19:26,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638156693] [2021-06-05 16:19:26,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:19:26,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:19:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:19:26,088 INFO L87 Difference]: Start difference. First operand 124342 states and 524468 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:27,144 INFO L93 Difference]: Finished difference Result 150913 states and 631324 transitions. [2021-06-05 16:19:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:19:27,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:19:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:28,011 INFO L225 Difference]: With dead ends: 150913 [2021-06-05 16:19:28,011 INFO L226 Difference]: Without dead ends: 150644 [2021-06-05 16:19:28,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:19:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150644 states. [2021-06-05 16:19:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150644 to 124604. [2021-06-05 16:19:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124604 states, 124603 states have (on average 4.217956228983251) internal successors, (525570), 124603 states have internal predecessors, (525570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124604 states to 124604 states and 525570 transitions. [2021-06-05 16:19:31,703 INFO L78 Accepts]: Start accepts. Automaton has 124604 states and 525570 transitions. Word has length 39 [2021-06-05 16:19:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:31,703 INFO L482 AbstractCegarLoop]: Abstraction has 124604 states and 525570 transitions. [2021-06-05 16:19:31,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 124604 states and 525570 transitions. [2021-06-05 16:19:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:31,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:31,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:32,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:19:32,209 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1204692115, now seen corresponding path program 98 times [2021-06-05 16:19:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:32,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401317746] [2021-06-05 16:19:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:32,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:32,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401317746] [2021-06-05 16:19:32,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401317746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:32,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002543799] [2021-06-05 16:19:32,371 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 [2021-06-05 16:19:32,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:19:32,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:19:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:19:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:32,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:32,509 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 41 treesize of output 21 [2021-06-05 16:19:32,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:32,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:32,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:32,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:30 [2021-06-05 16:19:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:32,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:32,583 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 50 treesize of output 14 [2021-06-05 16:19:32,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:32,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:32,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:32,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:19:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:32,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002543799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:32,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:32,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:19:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135953765] [2021-06-05 16:19:32,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:19:32,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:19:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:19:32,617 INFO L87 Difference]: Start difference. First operand 124604 states and 525570 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:34,086 INFO L93 Difference]: Finished difference Result 155019 states and 651444 transitions. [2021-06-05 16:19:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:19:34,087 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:19:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:35,028 INFO L225 Difference]: With dead ends: 155019 [2021-06-05 16:19:35,028 INFO L226 Difference]: Without dead ends: 154929 [2021-06-05 16:19:35,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:19:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154929 states. [2021-06-05 16:19:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154929 to 124536. [2021-06-05 16:19:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124536 states, 124535 states have (on average 4.2186052113863575) internal successors, (525364), 124535 states have internal predecessors, (525364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124536 states to 124536 states and 525364 transitions. [2021-06-05 16:19:38,340 INFO L78 Accepts]: Start accepts. Automaton has 124536 states and 525364 transitions. Word has length 39 [2021-06-05 16:19:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:38,340 INFO L482 AbstractCegarLoop]: Abstraction has 124536 states and 525364 transitions. [2021-06-05 16:19:38,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 124536 states and 525364 transitions. [2021-06-05 16:19:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:38,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:38,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:38,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:19:38,793 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1030940455, now seen corresponding path program 99 times [2021-06-05 16:19:38,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:38,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066782324] [2021-06-05 16:19:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:38,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:38,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066782324] [2021-06-05 16:19:38,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066782324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:38,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974952213] [2021-06-05 16:19:38,938 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 [2021-06-05 16:19:38,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:19:38,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:19:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:19:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:39,137 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:19:39,137 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 64 treesize of output 60 [2021-06-05 16:19:39,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:39,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:39,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:39,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2021-06-05 16:19:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:39,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 16:19:39,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:39,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:39,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:39,665 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-06-05 16:19:39,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:19:39,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:39,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:19:39,686 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:41 [2021-06-05 16:19:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:39,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974952213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:39,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:39,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:19:39,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312514331] [2021-06-05 16:19:39,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:19:39,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:19:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:19:39,771 INFO L87 Difference]: Start difference. First operand 124536 states and 525364 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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) [2021-06-05 16:19:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:42,756 INFO L93 Difference]: Finished difference Result 223951 states and 945036 transitions. [2021-06-05 16:19:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:19:42,756 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 39 [2021-06-05 16:19:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:43,503 INFO L225 Difference]: With dead ends: 223951 [2021-06-05 16:19:43,503 INFO L226 Difference]: Without dead ends: 223791 [2021-06-05 16:19:43,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1367.2ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:19:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223791 states. [2021-06-05 16:19:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223791 to 124234. [2021-06-05 16:19:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124234 states, 124233 states have (on average 4.217365756280538) internal successors, (523936), 124233 states have internal predecessors, (523936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124234 states to 124234 states and 523936 transitions. [2021-06-05 16:19:47,737 INFO L78 Accepts]: Start accepts. Automaton has 124234 states and 523936 transitions. Word has length 39 [2021-06-05 16:19:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:47,737 INFO L482 AbstractCegarLoop]: Abstraction has 124234 states and 523936 transitions. [2021-06-05 16:19:47,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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) [2021-06-05 16:19:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 124234 states and 523936 transitions. [2021-06-05 16:19:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:48,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:48,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:48,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:19:48,800 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:48,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash 339564365, now seen corresponding path program 100 times [2021-06-05 16:19:48,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:48,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544042264] [2021-06-05 16:19:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:48,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:48,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544042264] [2021-06-05 16:19:48,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544042264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:48,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049885788] [2021-06-05 16:19:48,919 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 [2021-06-05 16:19:48,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:19:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:19:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:19:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:49,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:49,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:49,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:49,114 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 59 treesize of output 39 [2021-06-05 16:19:49,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:49,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:49,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:19:49,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:52 [2021-06-05 16:19:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:49,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:49,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:49,155 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 50 treesize of output 14 [2021-06-05 16:19:49,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:19:49,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:49,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:49,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:19:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:49,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049885788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:49,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:49,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:19:49,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621344068] [2021-06-05 16:19:49,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:19:49,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:49,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:19:49,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:19:49,187 INFO L87 Difference]: Start difference. First operand 124234 states and 523936 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:50,817 INFO L93 Difference]: Finished difference Result 164785 states and 693473 transitions. [2021-06-05 16:19:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:19:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:19:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:51,326 INFO L225 Difference]: With dead ends: 164785 [2021-06-05 16:19:51,326 INFO L226 Difference]: Without dead ends: 164695 [2021-06-05 16:19:51,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:19:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164695 states. [2021-06-05 16:19:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164695 to 123327. [2021-06-05 16:19:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123327 states, 123326 states have (on average 4.217172372411333) internal successors, (520087), 123326 states have internal predecessors, (520087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123327 states to 123327 states and 520087 transitions. [2021-06-05 16:19:55,203 INFO L78 Accepts]: Start accepts. Automaton has 123327 states and 520087 transitions. Word has length 39 [2021-06-05 16:19:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:19:55,203 INFO L482 AbstractCegarLoop]: Abstraction has 123327 states and 520087 transitions. [2021-06-05 16:19:55,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:19:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 123327 states and 520087 transitions. [2021-06-05 16:19:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:19:55,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:19:55,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:19:55,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:19:55,724 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:19:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:19:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash 831476315, now seen corresponding path program 101 times [2021-06-05 16:19:55,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:19:55,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712048561] [2021-06-05 16:19:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:19:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:19:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:55,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:19:55,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712048561] [2021-06-05 16:19:55,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712048561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:55,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664057977] [2021-06-05 16:19:55,846 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 [2021-06-05 16:19:55,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:19:55,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:19:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:19:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:19:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:55,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:55,981 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 16:19:55,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:19:55,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:55,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:55,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:25 [2021-06-05 16:19:56,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:19:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:56,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:19:56,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:19:56,112 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:19:56,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:19:56,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:19:56,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-05 16:19:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:19:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664057977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:19:56,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:19:56,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:19:56,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182061104] [2021-06-05 16:19:56,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:19:56,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:19:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:19:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:19:56,136 INFO L87 Difference]: Start difference. First operand 123327 states and 520087 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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) [2021-06-05 16:19:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:19:57,926 INFO L93 Difference]: Finished difference Result 140494 states and 588412 transitions. [2021-06-05 16:19:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:19:57,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:19:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:19:58,382 INFO L225 Difference]: With dead ends: 140494 [2021-06-05 16:19:58,382 INFO L226 Difference]: Without dead ends: 140219 [2021-06-05 16:19:58,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:19:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140219 states. [2021-06-05 16:20:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140219 to 123391. [2021-06-05 16:20:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123391 states, 123390 states have (on average 4.217132668773806) internal successors, (520352), 123390 states have internal predecessors, (520352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123391 states to 123391 states and 520352 transitions. [2021-06-05 16:20:02,028 INFO L78 Accepts]: Start accepts. Automaton has 123391 states and 520352 transitions. Word has length 39 [2021-06-05 16:20:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:02,028 INFO L482 AbstractCegarLoop]: Abstraction has 123391 states and 520352 transitions. [2021-06-05 16:20:02,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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) [2021-06-05 16:20:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 123391 states and 520352 transitions. [2021-06-05 16:20:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:02,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:02,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:02,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-06-05 16:20:02,597 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:02,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:02,597 INFO L82 PathProgramCache]: Analyzing trace with hash -101292443, now seen corresponding path program 102 times [2021-06-05 16:20:02,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:02,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294342999] [2021-06-05 16:20:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:02,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:02,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294342999] [2021-06-05 16:20:02,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294342999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:02,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424138169] [2021-06-05 16:20:02,731 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 [2021-06-05 16:20:02,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:20:02,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:20:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:20:02,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:02,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:02,874 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 16:20:02,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:20:02,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:02,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:02,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:24 [2021-06-05 16:20:03,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:03,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:03,035 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:20:03,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:20:03,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:03,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:20:03,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:20:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:03,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424138169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:03,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:03,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:20:03,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780640155] [2021-06-05 16:20:03,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:20:03,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:03,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:20:03,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:20:03,091 INFO L87 Difference]: Start difference. First operand 123391 states and 520352 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:20:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:05,124 INFO L93 Difference]: Finished difference Result 156311 states and 654685 transitions. [2021-06-05 16:20:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:20:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:20:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:05,622 INFO L225 Difference]: With dead ends: 156311 [2021-06-05 16:20:05,622 INFO L226 Difference]: Without dead ends: 156230 [2021-06-05 16:20:05,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:20:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156230 states. [2021-06-05 16:20:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156230 to 123217. [2021-06-05 16:20:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123217 states, 123216 states have (on average 4.21818594987664) internal successors, (519748), 123216 states have internal predecessors, (519748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123217 states to 123217 states and 519748 transitions. [2021-06-05 16:20:09,626 INFO L78 Accepts]: Start accepts. Automaton has 123217 states and 519748 transitions. Word has length 39 [2021-06-05 16:20:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:09,626 INFO L482 AbstractCegarLoop]: Abstraction has 123217 states and 519748 transitions. [2021-06-05 16:20:09,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 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) [2021-06-05 16:20:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 123217 states and 519748 transitions. [2021-06-05 16:20:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:09,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:09,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:10,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 16:20:10,098 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 536940103, now seen corresponding path program 103 times [2021-06-05 16:20:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:10,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147851520] [2021-06-05 16:20:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:10,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:10,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147851520] [2021-06-05 16:20:10,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147851520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:10,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119253413] [2021-06-05 16:20:10,211 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 [2021-06-05 16:20:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:20:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:10,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:20:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:10,349 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 17 [2021-06-05 16:20:10,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:10,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:10,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:10,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:23 [2021-06-05 16:20:10,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:20:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:10,463 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 50 treesize of output 14 [2021-06-05 16:20:10,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:10,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:10,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:10,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:20:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:10,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119253413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:10,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:10,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:20:10,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330533977] [2021-06-05 16:20:10,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:20:10,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:10,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:20:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:20:10,486 INFO L87 Difference]: Start difference. First operand 123217 states and 519748 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-06-05 16:20:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:11,882 INFO L93 Difference]: Finished difference Result 144935 states and 609349 transitions. [2021-06-05 16:20:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:20:11,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 39 [2021-06-05 16:20:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:12,347 INFO L225 Difference]: With dead ends: 144935 [2021-06-05 16:20:12,347 INFO L226 Difference]: Without dead ends: 144854 [2021-06-05 16:20:12,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:20:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144854 states. [2021-06-05 16:20:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144854 to 123519. [2021-06-05 16:20:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123519 states, 123518 states have (on average 4.2170857688757915) internal successors, (520886), 123518 states have internal predecessors, (520886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123519 states to 123519 states and 520886 transitions. [2021-06-05 16:20:16,450 INFO L78 Accepts]: Start accepts. Automaton has 123519 states and 520886 transitions. Word has length 39 [2021-06-05 16:20:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:16,451 INFO L482 AbstractCegarLoop]: Abstraction has 123519 states and 520886 transitions. [2021-06-05 16:20:16,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-06-05 16:20:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 123519 states and 520886 transitions. [2021-06-05 16:20:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:16,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:16,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:17,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:20:17,073 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1823507719, now seen corresponding path program 104 times [2021-06-05 16:20:17,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:17,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029696319] [2021-06-05 16:20:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:17,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:17,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029696319] [2021-06-05 16:20:17,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029696319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:17,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113268659] [2021-06-05 16:20:17,217 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 [2021-06-05 16:20:17,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:20:17,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:20:17,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:20:17,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:17,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:17,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:20:17,381 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 17 [2021-06-05 16:20:17,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:17,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:17,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:17,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:25 [2021-06-05 16:20:17,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:17,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:17,495 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:20:17,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:20:17,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:17,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:20:17,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:20:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:17,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113268659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:17,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:17,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:20:17,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982314195] [2021-06-05 16:20:17,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:20:17,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:17,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:20:17,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:20:17,563 INFO L87 Difference]: Start difference. First operand 123519 states and 520886 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:19,288 INFO L93 Difference]: Finished difference Result 144261 states and 605249 transitions. [2021-06-05 16:20:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:20:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:20:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:19,806 INFO L225 Difference]: With dead ends: 144261 [2021-06-05 16:20:19,806 INFO L226 Difference]: Without dead ends: 143986 [2021-06-05 16:20:19,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:20:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143986 states. [2021-06-05 16:20:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143986 to 123345. [2021-06-05 16:20:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123345 states, 123344 states have (on average 4.217959527824621) internal successors, (520260), 123344 states have internal predecessors, (520260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123345 states to 123345 states and 520260 transitions. [2021-06-05 16:20:22,976 INFO L78 Accepts]: Start accepts. Automaton has 123345 states and 520260 transitions. Word has length 39 [2021-06-05 16:20:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:22,976 INFO L482 AbstractCegarLoop]: Abstraction has 123345 states and 520260 transitions. [2021-06-05 16:20:22,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 123345 states and 520260 transitions. [2021-06-05 16:20:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:23,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:23,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:24,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 16:20:24,043 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1149977299, now seen corresponding path program 105 times [2021-06-05 16:20:24,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:24,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267325318] [2021-06-05 16:20:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:24,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267325318] [2021-06-05 16:20:24,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267325318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107652386] [2021-06-05 16:20:24,153 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 [2021-06-05 16:20:24,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:20:24,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:20:24,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:20:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:24,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:24,341 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 48 [2021-06-05 16:20:24,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:24,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:24,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:24,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:49 [2021-06-05 16:20:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:24,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:24,457 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-06-05 16:20:24,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:20:24,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:24,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:20:24,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-06-05 16:20:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:24,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107652386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:24,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:24,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:20:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124701995] [2021-06-05 16:20:24,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:20:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:20:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:20:24,505 INFO L87 Difference]: Start difference. First operand 123345 states and 520260 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-06-05 16:20:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:26,277 INFO L93 Difference]: Finished difference Result 155614 states and 653344 transitions. [2021-06-05 16:20:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:20:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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 39 [2021-06-05 16:20:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:26,766 INFO L225 Difference]: With dead ends: 155614 [2021-06-05 16:20:26,766 INFO L226 Difference]: Without dead ends: 155533 [2021-06-05 16:20:26,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:20:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155533 states. [2021-06-05 16:20:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155533 to 123697. [2021-06-05 16:20:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123697 states, 123696 states have (on average 4.2182123916699) internal successors, (521776), 123696 states have internal predecessors, (521776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123697 states to 123697 states and 521776 transitions. [2021-06-05 16:20:30,560 INFO L78 Accepts]: Start accepts. Automaton has 123697 states and 521776 transitions. Word has length 39 [2021-06-05 16:20:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:30,561 INFO L482 AbstractCegarLoop]: Abstraction has 123697 states and 521776 transitions. [2021-06-05 16:20:30,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-06-05 16:20:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 123697 states and 521776 transitions. [2021-06-05 16:20:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:30,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:30,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:31,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:20:31,056 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:31,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1787565329, now seen corresponding path program 106 times [2021-06-05 16:20:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:31,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129412129] [2021-06-05 16:20:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:31,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:31,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129412129] [2021-06-05 16:20:31,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129412129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:31,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321675849] [2021-06-05 16:20:31,166 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 [2021-06-05 16:20:31,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:20:31,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:20:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:20:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:31,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:20:31,411 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 68 treesize of output 40 [2021-06-05 16:20:31,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:31,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:31,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:31,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:28 [2021-06-05 16:20:31,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:20:31,446 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 32 treesize of output 14 [2021-06-05 16:20:31,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:31,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:31,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:31,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:20:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:31,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321675849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:31,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:31,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:20:31,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016633899] [2021-06-05 16:20:31,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:20:31,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:20:31,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:20:31,464 INFO L87 Difference]: Start difference. First operand 123697 states and 521776 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:33,053 INFO L93 Difference]: Finished difference Result 151535 states and 637531 transitions. [2021-06-05 16:20:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:20:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:20:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:33,561 INFO L225 Difference]: With dead ends: 151535 [2021-06-05 16:20:33,561 INFO L226 Difference]: Without dead ends: 151454 [2021-06-05 16:20:33,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:20:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151454 states. [2021-06-05 16:20:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151454 to 123709. [2021-06-05 16:20:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123709 states, 123708 states have (on average 4.2182558929091085) internal successors, (521832), 123708 states have internal predecessors, (521832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123709 states to 123709 states and 521832 transitions. [2021-06-05 16:20:37,351 INFO L78 Accepts]: Start accepts. Automaton has 123709 states and 521832 transitions. Word has length 39 [2021-06-05 16:20:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:37,351 INFO L482 AbstractCegarLoop]: Abstraction has 123709 states and 521832 transitions. [2021-06-05 16:20:37,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 123709 states and 521832 transitions. [2021-06-05 16:20:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:37,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:37,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:37,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 16:20:37,866 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:37,867 INFO L82 PathProgramCache]: Analyzing trace with hash -368572305, now seen corresponding path program 107 times [2021-06-05 16:20:37,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:37,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591326922] [2021-06-05 16:20:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:37,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:37,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591326922] [2021-06-05 16:20:37,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591326922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:37,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828302956] [2021-06-05 16:20:37,985 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 [2021-06-05 16:20:38,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:20:38,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:20:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:20:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:38,181 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:20:38,181 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 41 treesize of output 29 [2021-06-05 16:20:38,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:38,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:38,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:38,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:30 [2021-06-05 16:20:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:38,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:38,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:38,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:38,228 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 16:20:38,232 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:20:38,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:38,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:20:38,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:19 [2021-06-05 16:20:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:38,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828302956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:38,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:38,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:20:38,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777150927] [2021-06-05 16:20:38,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:20:38,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:38,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:20:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:20:38,275 INFO L87 Difference]: Start difference. First operand 123709 states and 521832 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:20:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:40,333 INFO L93 Difference]: Finished difference Result 164806 states and 692755 transitions. [2021-06-05 16:20:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:20:40,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 16:20:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:40,870 INFO L225 Difference]: With dead ends: 164806 [2021-06-05 16:20:40,870 INFO L226 Difference]: Without dead ends: 164595 [2021-06-05 16:20:40,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:20:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164595 states. [2021-06-05 16:20:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164595 to 124175. [2021-06-05 16:20:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124175 states, 124174 states have (on average 4.217050268172081) internal successors, (523648), 124174 states have internal predecessors, (523648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124175 states to 124175 states and 523648 transitions. [2021-06-05 16:20:44,779 INFO L78 Accepts]: Start accepts. Automaton has 124175 states and 523648 transitions. Word has length 39 [2021-06-05 16:20:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:44,779 INFO L482 AbstractCegarLoop]: Abstraction has 124175 states and 523648 transitions. [2021-06-05 16:20:44,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:20:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 124175 states and 523648 transitions. [2021-06-05 16:20:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:45,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:45,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:45,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:20:45,237 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1108442007, now seen corresponding path program 108 times [2021-06-05 16:20:45,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:45,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124036934] [2021-06-05 16:20:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:45,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124036934] [2021-06-05 16:20:45,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124036934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:45,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953418368] [2021-06-05 16:20:45,380 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 [2021-06-05 16:20:45,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:20:45,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:20:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:20:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:45,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:45,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:20:45,598 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 45 treesize of output 27 [2021-06-05 16:20:45,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:45,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:45,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:45,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:32 [2021-06-05 16:20:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:45,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:45,660 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 16:20:45,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:20:45,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:45,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:20:45,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:27 [2021-06-05 16:20:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:45,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953418368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:45,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:45,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:20:45,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242358795] [2021-06-05 16:20:45,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:20:45,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:20:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:20:45,713 INFO L87 Difference]: Start difference. First operand 124175 states and 523648 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) [2021-06-05 16:20:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:47,497 INFO L93 Difference]: Finished difference Result 159336 states and 668490 transitions. [2021-06-05 16:20:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:20:47,497 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 39 [2021-06-05 16:20:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:48,004 INFO L225 Difference]: With dead ends: 159336 [2021-06-05 16:20:48,004 INFO L226 Difference]: Without dead ends: 158961 [2021-06-05 16:20:48,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:20:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158961 states. [2021-06-05 16:20:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158961 to 124123. [2021-06-05 16:20:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124123 states, 124122 states have (on average 4.217270105219058) internal successors, (523456), 124122 states have internal predecessors, (523456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124123 states to 124123 states and 523456 transitions. [2021-06-05 16:20:51,728 INFO L78 Accepts]: Start accepts. Automaton has 124123 states and 523456 transitions. Word has length 39 [2021-06-05 16:20:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:51,728 INFO L482 AbstractCegarLoop]: Abstraction has 124123 states and 523456 transitions. [2021-06-05 16:20:51,728 INFO L483 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) [2021-06-05 16:20:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 124123 states and 523456 transitions. [2021-06-05 16:20:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:51,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:51,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:52,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 16:20:52,175 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash -965518491, now seen corresponding path program 109 times [2021-06-05 16:20:52,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:52,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354519502] [2021-06-05 16:20:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:52,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:52,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354519502] [2021-06-05 16:20:52,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354519502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:52,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165494866] [2021-06-05 16:20:52,295 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 [2021-06-05 16:20:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:20:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:52,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:20:52,516 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 57 treesize of output 39 [2021-06-05 16:20:52,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:52,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:52,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:20:52,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:20:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:20:52,552 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 50 treesize of output 14 [2021-06-05 16:20:52,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:52,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:52,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:52,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:20:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:52,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165494866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:52,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:52,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:20:52,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393876683] [2021-06-05 16:20:52,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:20:52,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:20:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:20:52,580 INFO L87 Difference]: Start difference. First operand 124123 states and 523456 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) [2021-06-05 16:20:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:20:54,132 INFO L93 Difference]: Finished difference Result 143876 states and 604029 transitions. [2021-06-05 16:20:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:20:54,133 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 39 [2021-06-05 16:20:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:20:54,574 INFO L225 Difference]: With dead ends: 143876 [2021-06-05 16:20:54,574 INFO L226 Difference]: Without dead ends: 143579 [2021-06-05 16:20:54,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:20:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143579 states. [2021-06-05 16:20:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143579 to 124103. [2021-06-05 16:20:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124103 states, 124102 states have (on average 4.217385698860615) internal successors, (523386), 124102 states have internal predecessors, (523386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:20:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124103 states to 124103 states and 523386 transitions. [2021-06-05 16:20:58,663 INFO L78 Accepts]: Start accepts. Automaton has 124103 states and 523386 transitions. Word has length 39 [2021-06-05 16:20:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:20:58,663 INFO L482 AbstractCegarLoop]: Abstraction has 124103 states and 523386 transitions. [2021-06-05 16:20:58,664 INFO L483 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) [2021-06-05 16:20:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 124103 states and 523386 transitions. [2021-06-05 16:20:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:20:59,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:20:59,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:20:59,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 16:20:59,237 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:20:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:20:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash 167297691, now seen corresponding path program 110 times [2021-06-05 16:20:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:20:59,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407764550] [2021-06-05 16:20:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:20:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:20:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:59,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:20:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407764550] [2021-06-05 16:20:59,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407764550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317779613] [2021-06-05 16:20:59,401 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 [2021-06-05 16:20:59,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:20:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:20:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:20:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:20:59,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:20:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:59,556 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 17 [2021-06-05 16:20:59,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:20:59,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:59,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:20:59,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:25 [2021-06-05 16:20:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:20:59,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:59,726 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:20:59,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:20:59,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:20:59,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:20:59,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:20:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:20:59,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317779613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:20:59,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:20:59,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:20:59,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715755974] [2021-06-05 16:20:59,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:20:59,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:20:59,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:20:59,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:20:59,795 INFO L87 Difference]: Start difference. First operand 124103 states and 523386 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:21:01,689 INFO L93 Difference]: Finished difference Result 175919 states and 736534 transitions. [2021-06-05 16:21:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:21:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:21:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:21:02,264 INFO L225 Difference]: With dead ends: 175919 [2021-06-05 16:21:02,264 INFO L226 Difference]: Without dead ends: 175545 [2021-06-05 16:21:02,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:21:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175545 states. [2021-06-05 16:21:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175545 to 126556. [2021-06-05 16:21:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126556 states, 126555 states have (on average 4.211560191221208) internal successors, (532994), 126555 states have internal predecessors, (532994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126556 states to 126556 states and 532994 transitions. [2021-06-05 16:21:06,361 INFO L78 Accepts]: Start accepts. Automaton has 126556 states and 532994 transitions. Word has length 39 [2021-06-05 16:21:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:21:06,361 INFO L482 AbstractCegarLoop]: Abstraction has 126556 states and 532994 transitions. [2021-06-05 16:21:06,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 126556 states and 532994 transitions. [2021-06-05 16:21:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:21:06,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:21:06,611 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:21:06,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 16:21:06,811 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:21:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:21:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2101817165, now seen corresponding path program 111 times [2021-06-05 16:21:06,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:21:06,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648377454] [2021-06-05 16:21:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:21:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:06,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:21:06,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648377454] [2021-06-05 16:21:06,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648377454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:06,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530176987] [2021-06-05 16:21:06,962 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 [2021-06-05 16:21:06,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:21:06,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:21:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:21:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:21:07,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:07,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:07,098 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2021-06-05 16:21:07,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:21:07,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:07,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:07,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:34 [2021-06-05 16:21:07,238 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:21:07,238 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 44 treesize of output 40 [2021-06-05 16:21:07,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:21:07,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:07,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:21:07,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 16:21:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:07,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530176987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:07,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:21:07,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:21:07,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254609187] [2021-06-05 16:21:07,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:21:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:21:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:21:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:21:07,296 INFO L87 Difference]: Start difference. First operand 126556 states and 532994 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) [2021-06-05 16:21:07,983 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:21:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:21:09,748 INFO L93 Difference]: Finished difference Result 179860 states and 754143 transitions. [2021-06-05 16:21:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:21:09,761 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 39 [2021-06-05 16:21:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:21:10,313 INFO L225 Difference]: With dead ends: 179860 [2021-06-05 16:21:10,313 INFO L226 Difference]: Without dead ends: 179573 [2021-06-05 16:21:10,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:21:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179573 states. [2021-06-05 16:21:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179573 to 126552. [2021-06-05 16:21:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126552 states, 126551 states have (on average 4.2115352703653075) internal successors, (532974), 126551 states have internal predecessors, (532974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126552 states to 126552 states and 532974 transitions. [2021-06-05 16:21:14,234 INFO L78 Accepts]: Start accepts. Automaton has 126552 states and 532974 transitions. Word has length 39 [2021-06-05 16:21:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:21:14,234 INFO L482 AbstractCegarLoop]: Abstraction has 126552 states and 532974 transitions. [2021-06-05 16:21:14,234 INFO L483 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) [2021-06-05 16:21:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 126552 states and 532974 transitions. [2021-06-05 16:21:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:21:14,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:21:14,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:21:14,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:14,825 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:21:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:21:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1109315317, now seen corresponding path program 112 times [2021-06-05 16:21:14,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:21:14,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062770617] [2021-06-05 16:21:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:21:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:14,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:21:14,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062770617] [2021-06-05 16:21:14,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062770617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:14,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175111654] [2021-06-05 16:21:14,961 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:14,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:21:14,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:21:14,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:21:14,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:21:15,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:15,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:21:15,135 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 58 treesize of output 30 [2021-06-05 16:21:15,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:15,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:15,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:15,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:32 [2021-06-05 16:21:15,194 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:21:15,194 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 32 treesize of output 14 [2021-06-05 16:21:15,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:15,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:15,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:15,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:21:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:15,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175111654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:15,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:21:15,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:21:15,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127363796] [2021-06-05 16:21:15,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:21:15,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:21:15,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:21:15,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:21:15,212 INFO L87 Difference]: Start difference. First operand 126552 states and 532974 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:21:16,890 INFO L93 Difference]: Finished difference Result 170837 states and 717739 transitions. [2021-06-05 16:21:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:21:16,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:21:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:21:17,434 INFO L225 Difference]: With dead ends: 170837 [2021-06-05 16:21:17,434 INFO L226 Difference]: Without dead ends: 170750 [2021-06-05 16:21:17,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:21:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170750 states. [2021-06-05 16:21:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170750 to 127454. [2021-06-05 16:21:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127454 states, 127453 states have (on average 4.21303539343915) internal successors, (536964), 127453 states have internal predecessors, (536964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127454 states to 127454 states and 536964 transitions. [2021-06-05 16:21:21,551 INFO L78 Accepts]: Start accepts. Automaton has 127454 states and 536964 transitions. Word has length 39 [2021-06-05 16:21:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:21:21,551 INFO L482 AbstractCegarLoop]: Abstraction has 127454 states and 536964 transitions. [2021-06-05 16:21:21,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 127454 states and 536964 transitions. [2021-06-05 16:21:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:21:21,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:21:21,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:21:22,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 16:21:22,011 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:21:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:21:22,011 INFO L82 PathProgramCache]: Analyzing trace with hash 471727287, now seen corresponding path program 113 times [2021-06-05 16:21:22,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:21:22,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774646233] [2021-06-05 16:21:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:21:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:22,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:21:22,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774646233] [2021-06-05 16:21:22,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774646233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:22,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878638061] [2021-06-05 16:21:22,144 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:22,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:21:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:21:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:21:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:21:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:22,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:22,413 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 60 [2021-06-05 16:21:22,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:22,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:22,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:22,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:34 [2021-06-05 16:21:22,485 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:21:22,485 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 21 treesize of output 9 [2021-06-05 16:21:22,486 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:21:22,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:22,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:21:22,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2021-06-05 16:21:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:22,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878638061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:22,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:21:22,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:21:22,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371726363] [2021-06-05 16:21:22,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:21:22,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:21:22,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:21:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:21:22,502 INFO L87 Difference]: Start difference. First operand 127454 states and 536964 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:21:24,595 INFO L93 Difference]: Finished difference Result 174707 states and 731440 transitions. [2021-06-05 16:21:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:21:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:21:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:21:25,511 INFO L225 Difference]: With dead ends: 174707 [2021-06-05 16:21:25,511 INFO L226 Difference]: Without dead ends: 174062 [2021-06-05 16:21:25,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:21:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174062 states. [2021-06-05 16:21:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174062 to 135181. [2021-06-05 16:21:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135181 states, 135180 states have (on average 4.205866252404202) internal successors, (568549), 135180 states have internal predecessors, (568549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135181 states to 135181 states and 568549 transitions. [2021-06-05 16:21:29,712 INFO L78 Accepts]: Start accepts. Automaton has 135181 states and 568549 transitions. Word has length 39 [2021-06-05 16:21:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:21:29,712 INFO L482 AbstractCegarLoop]: Abstraction has 135181 states and 568549 transitions. [2021-06-05 16:21:29,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 135181 states and 568549 transitions. [2021-06-05 16:21:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:21:30,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:21:30,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:21:30,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:30,225 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:21:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:21:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1890720311, now seen corresponding path program 114 times [2021-06-05 16:21:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:21:30,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265207167] [2021-06-05 16:21:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:21:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:30,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:21:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265207167] [2021-06-05 16:21:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265207167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224171548] [2021-06-05 16:21:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:30,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:21:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:21:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:21:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:21:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:30,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:30,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 44 [2021-06-05 16:21:30,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:30,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:30,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:21:30,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:45 [2021-06-05 16:21:30,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:30,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:30,790 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-06-05 16:21:30,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:21:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:30,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 16:21:30,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:30,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:30,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:21:30,829 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:37 [2021-06-05 16:21:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:30,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224171548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:30,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:21:30,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:21:30,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610697489] [2021-06-05 16:21:30,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:21:30,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:21:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:21:30,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:21:30,899 INFO L87 Difference]: Start difference. First operand 135181 states and 568549 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:21:31,964 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-06-05 16:21:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:21:34,326 INFO L93 Difference]: Finished difference Result 225201 states and 946366 transitions. [2021-06-05 16:21:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:21:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 16:21:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:21:35,102 INFO L225 Difference]: With dead ends: 225201 [2021-06-05 16:21:35,102 INFO L226 Difference]: Without dead ends: 224682 [2021-06-05 16:21:35,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1534.4ms TimeCoverageRelationStatistics Valid=249, Invalid=1557, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:21:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224682 states. [2021-06-05 16:21:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224682 to 137450. [2021-06-05 16:21:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137450 states, 137449 states have (on average 4.207429664821134) internal successors, (578307), 137449 states have internal predecessors, (578307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137450 states to 137450 states and 578307 transitions. [2021-06-05 16:21:39,576 INFO L78 Accepts]: Start accepts. Automaton has 137450 states and 578307 transitions. Word has length 39 [2021-06-05 16:21:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:21:39,576 INFO L482 AbstractCegarLoop]: Abstraction has 137450 states and 578307 transitions. [2021-06-05 16:21:39,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-06-05 16:21:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 137450 states and 578307 transitions. [2021-06-05 16:21:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:21:40,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:21:40,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:21:40,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 16:21:40,712 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:21:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:21:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1523277007, now seen corresponding path program 115 times [2021-06-05 16:21:40,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:21:40,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879320093] [2021-06-05 16:21:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:21:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:40,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:21:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879320093] [2021-06-05 16:21:40,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879320093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290664596] [2021-06-05 16:21:40,862 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:40,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:21:40,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:21:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:41,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:21:41,079 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 68 treesize of output 40 [2021-06-05 16:21:41,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:41,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:41,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:41,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:28 [2021-06-05 16:21:41,110 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:21:41,110 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 32 treesize of output 14 [2021-06-05 16:21:41,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:41,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:41,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:41,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:21:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:41,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290664596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:41,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:21:41,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:21:41,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738545085] [2021-06-05 16:21:41,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:21:41,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:21:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:21:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:21:41,133 INFO L87 Difference]: Start difference. First operand 137450 states and 578307 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:21:43,226 INFO L93 Difference]: Finished difference Result 181373 states and 758213 transitions. [2021-06-05 16:21:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:21:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:21:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:21:44,137 INFO L225 Difference]: With dead ends: 181373 [2021-06-05 16:21:44,138 INFO L226 Difference]: Without dead ends: 180934 [2021-06-05 16:21:44,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:21:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180934 states. [2021-06-05 16:21:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180934 to 137386. [2021-06-05 16:21:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137386 states, 137385 states have (on average 4.208559886450486) internal successors, (578193), 137385 states have internal predecessors, (578193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137386 states to 137386 states and 578193 transitions. [2021-06-05 16:21:48,307 INFO L78 Accepts]: Start accepts. Automaton has 137386 states and 578193 transitions. Word has length 39 [2021-06-05 16:21:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:21:48,307 INFO L482 AbstractCegarLoop]: Abstraction has 137386 states and 578193 transitions. [2021-06-05 16:21:48,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 137386 states and 578193 transitions. [2021-06-05 16:21:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:21:48,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:21:48,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:21:48,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable472 [2021-06-05 16:21:48,826 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:21:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:21:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1880320479, now seen corresponding path program 116 times [2021-06-05 16:21:48,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:21:48,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845024877] [2021-06-05 16:21:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:21:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:49,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:21:49,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845024877] [2021-06-05 16:21:49,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845024877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:49,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526343378] [2021-06-05 16:21:49,001 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:49,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:21:49,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:21:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:21:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:21:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:21:49,158 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 58 treesize of output 30 [2021-06-05 16:21:49,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:49,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:49,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:49,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:37 [2021-06-05 16:21:49,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:49,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:49,236 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 16:21:49,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:21:49,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:49,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:21:49,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:27 [2021-06-05 16:21:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:49,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526343378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:49,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:21:49,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:21:49,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645018782] [2021-06-05 16:21:49,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:21:49,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:21:49,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:21:49,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:21:49,283 INFO L87 Difference]: Start difference. First operand 137386 states and 578193 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2021-06-05 16:21:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:21:51,436 INFO L93 Difference]: Finished difference Result 199856 states and 838102 transitions. [2021-06-05 16:21:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:21:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 39 [2021-06-05 16:21:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:21:52,527 INFO L225 Difference]: With dead ends: 199856 [2021-06-05 16:21:52,528 INFO L226 Difference]: Without dead ends: 199769 [2021-06-05 16:21:52,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:21:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199769 states. [2021-06-05 16:21:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199769 to 138340. [2021-06-05 16:21:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138340 states, 138339 states have (on average 4.207916784131735) internal successors, (582119), 138339 states have internal predecessors, (582119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:21:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138340 states to 138340 states and 582119 transitions. [2021-06-05 16:21:57,045 INFO L78 Accepts]: Start accepts. Automaton has 138340 states and 582119 transitions. Word has length 39 [2021-06-05 16:21:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:21:57,045 INFO L482 AbstractCegarLoop]: Abstraction has 138340 states and 582119 transitions. [2021-06-05 16:21:57,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2021-06-05 16:21:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 138340 states and 582119 transitions. [2021-06-05 16:21:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:21:57,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:21:57,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:21:57,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:57,563 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:21:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:21:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash -644908305, now seen corresponding path program 117 times [2021-06-05 16:21:57,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:21:57,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036364372] [2021-06-05 16:21:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:21:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:21:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:57,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:21:57,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036364372] [2021-06-05 16:21:57,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036364372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:57,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881602021] [2021-06-05 16:21:57,730 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:21:57,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:21:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:21:57,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:21:57,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:21:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:57,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:57,996 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2021-06-05 16:21:58,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:21:58,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:58,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:21:58,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:58 [2021-06-05 16:21:58,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:58,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:21:58,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:58,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 32 [2021-06-05 16:21:58,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:21:58,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:21:58,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:21:58,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:22 [2021-06-05 16:21:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:21:58,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881602021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:21:58,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:21:58,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:21:58,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364709633] [2021-06-05 16:21:58,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:21:58,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:21:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:21:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:21:58,124 INFO L87 Difference]: Start difference. First operand 138340 states and 582119 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-06-05 16:22:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:01,099 INFO L93 Difference]: Finished difference Result 192005 states and 806057 transitions. [2021-06-05 16:22:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:22:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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 39 [2021-06-05 16:22:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:01,700 INFO L225 Difference]: With dead ends: 192005 [2021-06-05 16:22:01,701 INFO L226 Difference]: Without dead ends: 191918 [2021-06-05 16:22:01,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 843.1ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:22:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191918 states. [2021-06-05 16:22:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191918 to 138780. [2021-06-05 16:22:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138780 states, 138779 states have (on average 4.207646690061177) internal successors, (583933), 138779 states have internal predecessors, (583933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138780 states to 138780 states and 583933 transitions. [2021-06-05 16:22:05,970 INFO L78 Accepts]: Start accepts. Automaton has 138780 states and 583933 transitions. Word has length 39 [2021-06-05 16:22:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:05,971 INFO L482 AbstractCegarLoop]: Abstraction has 138780 states and 583933 transitions. [2021-06-05 16:22:05,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-06-05 16:22:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 138780 states and 583933 transitions. [2021-06-05 16:22:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:22:06,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:06,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:22:06,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 16:22:06,477 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash 774084719, now seen corresponding path program 118 times [2021-06-05 16:22:06,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:06,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722629942] [2021-06-05 16:22:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:06,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:06,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722629942] [2021-06-05 16:22:06,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722629942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:06,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056933579] [2021-06-05 16:22:06,639 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:06,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:22:06,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:22:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:06,868 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:22:06,869 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 57 treesize of output 39 [2021-06-05 16:22:06,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:06,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:06,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:06,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 16:22:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:22:06,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:22:06,907 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 50 treesize of output 14 [2021-06-05 16:22:06,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:06,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:06,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:06,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 16:22:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:06,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056933579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:06,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:22:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162493813] [2021-06-05 16:22:06,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:22:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:22:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:22:06,931 INFO L87 Difference]: Start difference. First operand 138780 states and 583933 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-06-05 16:22:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:08,784 INFO L93 Difference]: Finished difference Result 190260 states and 799173 transitions. [2021-06-05 16:22:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:22:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:22:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:09,786 INFO L225 Difference]: With dead ends: 190260 [2021-06-05 16:22:09,786 INFO L226 Difference]: Without dead ends: 189867 [2021-06-05 16:22:09,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:22:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189867 states. [2021-06-05 16:22:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189867 to 138519. [2021-06-05 16:22:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138519 states, 138518 states have (on average 4.208196768651006) internal successors, (582911), 138518 states have internal predecessors, (582911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138519 states to 138519 states and 582911 transitions. [2021-06-05 16:22:14,087 INFO L78 Accepts]: Start accepts. Automaton has 138519 states and 582911 transitions. Word has length 39 [2021-06-05 16:22:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:14,087 INFO L482 AbstractCegarLoop]: Abstraction has 138519 states and 582911 transitions. [2021-06-05 16:22:14,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-06-05 16:22:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 138519 states and 582911 transitions. [2021-06-05 16:22:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:22:14,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:14,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:22:14,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:14,619 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 165726021, now seen corresponding path program 119 times [2021-06-05 16:22:14,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:14,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076348044] [2021-06-05 16:22:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:14,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:14,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076348044] [2021-06-05 16:22:14,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076348044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:14,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914878780] [2021-06-05 16:22:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:14,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:22:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:22:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:15,024 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 16:22:15,025 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 41 treesize of output 45 [2021-06-05 16:22:15,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:22:15,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:15,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:15,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2021-06-05 16:22:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:22:15,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:15,152 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-06-05 16:22:15,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:22:15,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:15,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:22:15,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:16 [2021-06-05 16:22:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:15,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914878780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:15,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:15,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:22:15,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888464161] [2021-06-05 16:22:15,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:22:15,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:15,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:22:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:22:15,215 INFO L87 Difference]: Start difference. First operand 138519 states and 582911 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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) [2021-06-05 16:22:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:18,966 INFO L93 Difference]: Finished difference Result 256162 states and 1078199 transitions. [2021-06-05 16:22:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:22:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 39 [2021-06-05 16:22:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:19,828 INFO L225 Difference]: With dead ends: 256162 [2021-06-05 16:22:19,829 INFO L226 Difference]: Without dead ends: 255716 [2021-06-05 16:22:19,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1145.9ms TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:22:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255716 states. [2021-06-05 16:22:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255716 to 142940. [2021-06-05 16:22:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142940 states, 142939 states have (on average 4.206584627008724) internal successors, (601285), 142939 states have internal predecessors, (601285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142940 states to 142940 states and 601285 transitions. [2021-06-05 16:22:25,237 INFO L78 Accepts]: Start accepts. Automaton has 142940 states and 601285 transitions. Word has length 39 [2021-06-05 16:22:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:25,238 INFO L482 AbstractCegarLoop]: Abstraction has 142940 states and 601285 transitions. [2021-06-05 16:22:25,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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) [2021-06-05 16:22:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 142940 states and 601285 transitions. [2021-06-05 16:22:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:22:25,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:25,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:22:25,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:25,785 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash 110625703, now seen corresponding path program 120 times [2021-06-05 16:22:25,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:25,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024185748] [2021-06-05 16:22:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:25,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:25,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024185748] [2021-06-05 16:22:25,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024185748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:25,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043599610] [2021-06-05 16:22:25,968 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:25,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:22:25,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:22:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:26,152 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:22:26,152 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 45 treesize of output 27 [2021-06-05 16:22:26,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:26,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:26,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:26,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:32 [2021-06-05 16:22:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:22:26,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:26,231 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-06-05 16:22:26,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:22:26,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:26,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:22:26,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:21 [2021-06-05 16:22:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:26,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043599610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:26,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:26,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:22:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618897816] [2021-06-05 16:22:26,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:22:26,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:22:26,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:22:26,299 INFO L87 Difference]: Start difference. First operand 142940 states and 601285 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:29,268 INFO L93 Difference]: Finished difference Result 200264 states and 838268 transitions. [2021-06-05 16:22:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:22:29,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 16:22:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:30,013 INFO L225 Difference]: With dead ends: 200264 [2021-06-05 16:22:30,013 INFO L226 Difference]: Without dead ends: 199921 [2021-06-05 16:22:30,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:22:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199921 states. [2021-06-05 16:22:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199921 to 143084. [2021-06-05 16:22:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143084 states, 143083 states have (on average 4.2064466079128895) internal successors, (601871), 143083 states have internal predecessors, (601871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143084 states to 143084 states and 601871 transitions. [2021-06-05 16:22:34,402 INFO L78 Accepts]: Start accepts. Automaton has 143084 states and 601871 transitions. Word has length 39 [2021-06-05 16:22:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 143084 states and 601871 transitions. [2021-06-05 16:22:34,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 143084 states and 601871 transitions. [2021-06-05 16:22:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:22:34,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:34,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:22:34,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 16:22:34,940 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1214187437, now seen corresponding path program 121 times [2021-06-05 16:22:34,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:34,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545675487] [2021-06-05 16:22:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:35,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:35,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545675487] [2021-06-05 16:22:35,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545675487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:35,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646493338] [2021-06-05 16:22:35,124 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:22:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:22:35,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:22:35,299 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 68 treesize of output 40 [2021-06-05 16:22:35,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:35,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:35,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:35,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:28 [2021-06-05 16:22:35,327 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:22:35,327 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 32 treesize of output 14 [2021-06-05 16:22:35,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:35,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:35,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:35,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 16:22:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:35,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646493338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:35,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:35,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:22:35,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446175035] [2021-06-05 16:22:35,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:22:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:22:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:22:35,356 INFO L87 Difference]: Start difference. First operand 143084 states and 601871 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) [2021-06-05 16:22:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:37,338 INFO L93 Difference]: Finished difference Result 195711 states and 817814 transitions. [2021-06-05 16:22:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:22:37,338 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 39 [2021-06-05 16:22:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:38,403 INFO L225 Difference]: With dead ends: 195711 [2021-06-05 16:22:38,403 INFO L226 Difference]: Without dead ends: 195284 [2021-06-05 16:22:38,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:22:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195284 states. [2021-06-05 16:22:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195284 to 142528. [2021-06-05 16:22:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142528 states, 142527 states have (on average 4.206929213412195) internal successors, (599601), 142527 states have internal predecessors, (599601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142528 states to 142528 states and 599601 transitions. [2021-06-05 16:22:42,754 INFO L78 Accepts]: Start accepts. Automaton has 142528 states and 599601 transitions. Word has length 39 [2021-06-05 16:22:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:42,754 INFO L482 AbstractCegarLoop]: Abstraction has 142528 states and 599601 transitions. [2021-06-05 16:22:42,754 INFO L483 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) [2021-06-05 16:22:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 142528 states and 599601 transitions. [2021-06-05 16:22:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:22:43,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:43,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:22:43,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 16:22:43,329 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 148252543, now seen corresponding path program 122 times [2021-06-05 16:22:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:43,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883706720] [2021-06-05 16:22:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:43,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883706720] [2021-06-05 16:22:43,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883706720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711269364] [2021-06-05 16:22:43,449 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:43,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:22:43,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:43,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:22:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:43,544 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:22:43,544 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 35 treesize of output 17 [2021-06-05 16:22:43,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:43,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:43,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:43,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 16:22:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:22:43,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:43,627 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 16:22:43,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:22:43,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:43,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:22:43,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 16:22:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:22:43,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711269364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:43,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:43,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2021-06-05 16:22:43,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150937040] [2021-06-05 16:22:43,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:22:43,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:22:43,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:22:43,679 INFO L87 Difference]: Start difference. First operand 142528 states and 599601 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2021-06-05 16:22:45,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:45,495 INFO L93 Difference]: Finished difference Result 183911 states and 776619 transitions. [2021-06-05 16:22:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:22:45,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 39 [2021-06-05 16:22:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:46,094 INFO L225 Difference]: With dead ends: 183911 [2021-06-05 16:22:46,094 INFO L226 Difference]: Without dead ends: 183856 [2021-06-05 16:22:46,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:22:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183856 states. [2021-06-05 16:22:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183856 to 143259. [2021-06-05 16:22:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143259 states, 143258 states have (on average 4.20666908654316) internal successors, (602639), 143258 states have internal predecessors, (602639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:22:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143259 states to 143259 states and 602639 transitions. [2021-06-05 16:22:50,356 INFO L78 Accepts]: Start accepts. Automaton has 143259 states and 602639 transitions. Word has length 39 [2021-06-05 16:22:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:50,356 INFO L482 AbstractCegarLoop]: Abstraction has 143259 states and 602639 transitions. [2021-06-05 16:22:50,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2021-06-05 16:22:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 143259 states and 602639 transitions. [2021-06-05 16:22:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 16:22:50,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:50,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:22:50,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 16:22:50,867 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2082772017, now seen corresponding path program 123 times [2021-06-05 16:22:50,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:50,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351076961] [2021-06-05 16:22:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat