/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:02:12,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:02:12,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:02:12,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:02:12,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 22:02:12,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 22:02:12,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 22:02:12,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:02:12,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:02:12,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:02:12,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:02:12,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:02:12,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:02:12,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:02:12,134 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:02:12,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:02:12,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:02:12,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:02:12,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:02:12,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:02:12,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:02:12,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:02:12,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:02:12,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:02:12,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:02:12,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:02:12,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:02:12,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:02:12,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:02:12,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:02:12,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:02:12,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:02:12,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:02:12,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:02:12,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:02:12,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:02:12,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:02:12,138 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:02:12,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:02:12,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:02:12,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:02:12,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:02:12,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:02:12,428 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:02:12,429 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:02:12,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl [2021-06-05 22:02:12,431 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl' [2021-06-05 22:02:12,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:02:12,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:02:12,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:02:12,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:02:12,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:02:12,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:02:12,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:02:12,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:02:12,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:02:12,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/1) ... [2021-06-05 22:02:12,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:02:12,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:02:12,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:02:12,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:02:12,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (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 22:02:12,586 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:02:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:02:12,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:02:12,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:02:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:02:12,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:02:12,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:02:12,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:02:12,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:02:12,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:02:12,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:02:12,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:02:12,591 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 22:02:13,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:02:13,100 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 22:02:13,102 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:02:13 BoogieIcfgContainer [2021-06-05 22:02:13,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:02:13,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:02:13,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:02:13,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:02:13,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:02:12" (1/2) ... [2021-06-05 22:02:13,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1473233d and model type nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:02:13, skipping insertion in model container [2021-06-05 22:02:13,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:02:13" (2/2) ... [2021-06-05 22:02:13,113 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-subst.wvr.bpl [2021-06-05 22:02:13,117 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:02:13,118 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:02:13,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:02:13,119 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:02:13,162 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 22:02:13,182 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 22:02:13,207 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:02:13,207 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:02:13,207 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:02:13,207 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:02:13,207 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:02:13,208 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:02:13,208 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:02:13,208 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:02:13,216 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-06-05 22:02:13,230 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:02:13,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:13,239 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:13,240 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash 454115418, now seen corresponding path program 1 times [2021-06-05 22:02:13,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:13,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570966819] [2021-06-05 22:02:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:13,654 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 22:02:13,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:13,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570966819] [2021-06-05 22:02:13,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570966819] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:13,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:13,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128037584] [2021-06-05 22:02:13,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:13,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:13,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:13,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:13,680 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,833 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:02:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:14,029 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2021-06-05 22:02:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:02:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:14,046 INFO L225 Difference]: With dead ends: 265 [2021-06-05 22:02:14,046 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 22:02:14,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 329.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 22:02:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-06-05 22:02:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-06-05 22:02:14,138 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-06-05 22:02:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:14,139 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-06-05 22:02:14,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-06-05 22:02:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:02:14,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:14,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:14,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:02:14,143 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash -947352844, now seen corresponding path program 2 times [2021-06-05 22:02:14,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:14,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959396306] [2021-06-05 22:02:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:14,292 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 22:02:14,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:14,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959396306] [2021-06-05 22:02:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959396306] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:14,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:14,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:14,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489174964] [2021-06-05 22:02:14,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:14,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:14,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:14,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:14,295 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:14,463 INFO L93 Difference]: Finished difference Result 278 states and 851 transitions. [2021-06-05 22:02:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:02:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:14,467 INFO L225 Difference]: With dead ends: 278 [2021-06-05 22:02:14,467 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 22:02:14,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 22:02:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 132. [2021-06-05 22:02:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-06-05 22:02:14,490 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-06-05 22:02:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:14,490 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-06-05 22:02:14,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-06-05 22:02:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:02:14,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:14,494 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:14,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:02:14,494 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-06-05 22:02:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:14,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172417362] [2021-06-05 22:02:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:14,603 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 22:02:14,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172417362] [2021-06-05 22:02:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172417362] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:14,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:14,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:14,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317036282] [2021-06-05 22:02:14,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:14,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:14,605 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:14,819 INFO L93 Difference]: Finished difference Result 363 states and 1192 transitions. [2021-06-05 22:02:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:02:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:02:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:14,822 INFO L225 Difference]: With dead ends: 363 [2021-06-05 22:02:14,822 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:02:14,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:02:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:02:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 140. [2021-06-05 22:02:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 22:02:14,833 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 22:02:14,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:14,834 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 22:02:14,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 22:02:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:02:14,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:14,835 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:14,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:02:14,835 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-06-05 22:02:14,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:14,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236092695] [2021-06-05 22:02:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:15,083 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 22:02:15,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236092695] [2021-06-05 22:02:15,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236092695] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:15,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:15,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:15,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20223302] [2021-06-05 22:02:15,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:15,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:15,086 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:15,349 INFO L93 Difference]: Finished difference Result 248 states and 718 transitions. [2021-06-05 22:02:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:02:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:15,351 INFO L225 Difference]: With dead ends: 248 [2021-06-05 22:02:15,351 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 22:02:15,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 22:02:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 140. [2021-06-05 22:02:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 22:02:15,368 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 22:02:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:15,368 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 22:02:15,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 22:02:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:02:15,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:15,369 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:15,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:02:15,370 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-06-05 22:02:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:15,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411258101] [2021-06-05 22:02:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:15,511 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 22:02:15,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:15,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411258101] [2021-06-05 22:02:15,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411258101] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:15,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:15,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:15,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56507290] [2021-06-05 22:02:15,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:15,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:15,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:15,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:15,514 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:15,709 INFO L93 Difference]: Finished difference Result 371 states and 1217 transitions. [2021-06-05 22:02:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:02:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:02:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:15,712 INFO L225 Difference]: With dead ends: 371 [2021-06-05 22:02:15,712 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 22:02:15,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:02:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 22:02:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 142. [2021-06-05 22:02:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 22:02:15,719 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 22:02:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:15,720 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 22:02:15,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 22:02:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:02:15,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:15,721 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:15,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:02:15,721 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-06-05 22:02:15,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:15,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199802552] [2021-06-05 22:02:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:15,903 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 22:02:15,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:15,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199802552] [2021-06-05 22:02:15,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199802552] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:15,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:15,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:15,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012543744] [2021-06-05 22:02:15,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:15,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:15,906 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,050 INFO L93 Difference]: Finished difference Result 295 states and 918 transitions. [2021-06-05 22:02:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:16,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:02:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,053 INFO L225 Difference]: With dead ends: 295 [2021-06-05 22:02:16,053 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 22:02:16,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 22:02:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 142. [2021-06-05 22:02:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 22:02:16,059 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 22:02:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,059 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 22:02:16,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 22:02:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:02:16,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,061 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 22:02:16,061 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1444712772, now seen corresponding path program 1 times [2021-06-05 22:02:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165018486] [2021-06-05 22:02:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165018486] [2021-06-05 22:02:16,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165018486] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:16,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:16,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:02:16,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998015153] [2021-06-05 22:02:16,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:02:16,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:02:16,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:02:16,077 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,081 INFO L93 Difference]: Finished difference Result 166 states and 549 transitions. [2021-06-05 22:02:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:02:16,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:02:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,083 INFO L225 Difference]: With dead ends: 166 [2021-06-05 22:02:16,083 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 22:02:16,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:02:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 22:02:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-06-05 22:02:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-06-05 22:02:16,089 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-06-05 22:02:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,089 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-06-05 22:02:16,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-06-05 22:02:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:02:16,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,090 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:02:16,090 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash 868256482, now seen corresponding path program 1 times [2021-06-05 22:02:16,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667439673] [2021-06-05 22:02:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,105 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 22:02:16,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667439673] [2021-06-05 22:02:16,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667439673] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:16,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:16,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:02:16,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363756156] [2021-06-05 22:02:16,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:02:16,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:02:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:02:16,107 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,113 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2021-06-05 22:02:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:02:16,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:02:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,115 INFO L225 Difference]: With dead ends: 192 [2021-06-05 22:02:16,115 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 22:02:16,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:02:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 22:02:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-06-05 22:02:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-06-05 22:02:16,122 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-06-05 22:02:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,122 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-06-05 22:02:16,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-06-05 22:02:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:02:16,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,123 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 22:02:16,123 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-06-05 22:02:16,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228996397] [2021-06-05 22:02:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,140 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 22:02:16,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228996397] [2021-06-05 22:02:16,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228996397] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:16,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:16,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:02:16,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989246104] [2021-06-05 22:02:16,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:02:16,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:02:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:02:16,142 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,147 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2021-06-05 22:02:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:02:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:02:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,149 INFO L225 Difference]: With dead ends: 223 [2021-06-05 22:02:16,150 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 22:02:16,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:02:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 22:02:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-05 22:02:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-06-05 22:02:16,157 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-06-05 22:02:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,157 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-06-05 22:02:16,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-06-05 22:02:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:16,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,159 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 22:02:16,159 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1505443044, now seen corresponding path program 1 times [2021-06-05 22:02:16,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663492056] [2021-06-05 22:02:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:16,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663492056] [2021-06-05 22:02:16,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663492056] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:16,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:16,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942982431] [2021-06-05 22:02:16,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:16,190 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,205 INFO L93 Difference]: Finished difference Result 385 states and 1193 transitions. [2021-06-05 22:02:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,208 INFO L225 Difference]: With dead ends: 385 [2021-06-05 22:02:16,208 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 22:02:16,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 22:02:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 229. [2021-06-05 22:02:16,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.280701754385965) internal successors, (748), 228 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 748 transitions. [2021-06-05 22:02:16,216 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 748 transitions. Word has length 16 [2021-06-05 22:02:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,217 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 748 transitions. [2021-06-05 22:02:16,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 748 transitions. [2021-06-05 22:02:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:16,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,218 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 22:02:16,218 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,219 INFO L82 PathProgramCache]: Analyzing trace with hash 821727578, now seen corresponding path program 1 times [2021-06-05 22:02:16,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402310756] [2021-06-05 22:02:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:16,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402310756] [2021-06-05 22:02:16,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402310756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:16,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:16,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:16,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114213798] [2021-06-05 22:02:16,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:16,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:16,249 INFO L87 Difference]: Start difference. First operand 229 states and 748 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,267 INFO L93 Difference]: Finished difference Result 370 states and 1123 transitions. [2021-06-05 22:02:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,269 INFO L225 Difference]: With dead ends: 370 [2021-06-05 22:02:16,270 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:02:16,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:02:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 232. [2021-06-05 22:02:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.272727272727273) internal successors, (756), 231 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 756 transitions. [2021-06-05 22:02:16,278 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 756 transitions. Word has length 16 [2021-06-05 22:02:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,279 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 756 transitions. [2021-06-05 22:02:16,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 756 transitions. [2021-06-05 22:02:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:16,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,280 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 22:02:16,280 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-06-05 22:02:16,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645442044] [2021-06-05 22:02:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645442044] [2021-06-05 22:02:16,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645442044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530017628] [2021-06-05 22:02:16,340 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 22:02:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:02:16,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530017628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:16,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:02:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189222509] [2021-06-05 22:02:16,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:02:16,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:02:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:16,496 INFO L87 Difference]: Start difference. First operand 232 states and 756 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,565 INFO L93 Difference]: Finished difference Result 376 states and 1097 transitions. [2021-06-05 22:02:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:16,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,568 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:02:16,568 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 22:02:16,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:02:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 22:02:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 232. [2021-06-05 22:02:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.2337662337662336) internal successors, (747), 231 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 747 transitions. [2021-06-05 22:02:16,579 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 747 transitions. Word has length 16 [2021-06-05 22:02:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,580 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 747 transitions. [2021-06-05 22:02:16,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 747 transitions. [2021-06-05 22:02:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:16,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,581 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 22:02:16,804 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1703674642, now seen corresponding path program 2 times [2021-06-05 22:02:16,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570426146] [2021-06-05 22:02:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570426146] [2021-06-05 22:02:16,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570426146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283208990] [2021-06-05 22:02:16,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:16,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:16,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:16,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:02:16,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283208990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:16,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:02:16,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238251131] [2021-06-05 22:02:16,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:02:16,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:02:16,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:16,993 INFO L87 Difference]: Start difference. First operand 232 states and 747 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:17,144 INFO L93 Difference]: Finished difference Result 556 states and 1605 transitions. [2021-06-05 22:02:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:02:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:17,147 INFO L225 Difference]: With dead ends: 556 [2021-06-05 22:02:17,148 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 22:02:17,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:02:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 22:02:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 244. [2021-06-05 22:02:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2181069958847734) internal successors, (782), 243 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 782 transitions. [2021-06-05 22:02:17,160 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 782 transitions. Word has length 16 [2021-06-05 22:02:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:17,160 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 782 transitions. [2021-06-05 22:02:17,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 782 transitions. [2021-06-05 22:02:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:17,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:17,161 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:17,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 22:02:17,377 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 2 times [2021-06-05 22:02:17,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:17,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427741208] [2021-06-05 22:02:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:17,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427741208] [2021-06-05 22:02:17,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427741208] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:17,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:17,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:17,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413374665] [2021-06-05 22:02:17,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:17,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:17,411 INFO L87 Difference]: Start difference. First operand 244 states and 782 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:17,460 INFO L93 Difference]: Finished difference Result 428 states and 1250 transitions. [2021-06-05 22:02:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:17,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:17,462 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:02:17,462 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 22:02:17,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 22:02:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 215. [2021-06-05 22:02:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.177570093457944) internal successors, (680), 214 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 680 transitions. [2021-06-05 22:02:17,469 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 680 transitions. Word has length 16 [2021-06-05 22:02:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:17,469 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 680 transitions. [2021-06-05 22:02:17,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 680 transitions. [2021-06-05 22:02:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:17,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:17,470 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:17,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 22:02:17,470 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 3 times [2021-06-05 22:02:17,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:17,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464655755] [2021-06-05 22:02:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:17,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464655755] [2021-06-05 22:02:17,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464655755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:17,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:17,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:17,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109494720] [2021-06-05 22:02:17,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:17,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:17,524 INFO L87 Difference]: Start difference. First operand 215 states and 680 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:17,577 INFO L93 Difference]: Finished difference Result 408 states and 1184 transitions. [2021-06-05 22:02:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:17,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:17,581 INFO L225 Difference]: With dead ends: 408 [2021-06-05 22:02:17,581 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 22:02:17,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:02:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 22:02:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 215. [2021-06-05 22:02:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.1682242990654204) internal successors, (678), 214 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 678 transitions. [2021-06-05 22:02:17,590 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 678 transitions. Word has length 16 [2021-06-05 22:02:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:17,590 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 678 transitions. [2021-06-05 22:02:17,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 678 transitions. [2021-06-05 22:02:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:17,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:17,591 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:17,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 22:02:17,591 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:17,592 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-06-05 22:02:17,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:17,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217336831] [2021-06-05 22:02:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:17,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217336831] [2021-06-05 22:02:17,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217336831] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:17,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:17,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:17,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545431399] [2021-06-05 22:02:17,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:17,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:17,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:17,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:17,656 INFO L87 Difference]: Start difference. First operand 215 states and 678 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:17,700 INFO L93 Difference]: Finished difference Result 369 states and 1047 transitions. [2021-06-05 22:02:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:17,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:17,703 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:02:17,703 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 22:02:17,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:02:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 22:02:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 215. [2021-06-05 22:02:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.1588785046728973) internal successors, (676), 214 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 676 transitions. [2021-06-05 22:02:17,712 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 676 transitions. Word has length 16 [2021-06-05 22:02:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:17,712 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 676 transitions. [2021-06-05 22:02:17,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 676 transitions. [2021-06-05 22:02:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:17,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:17,714 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:17,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 22:02:17,715 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:17,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1742439980, now seen corresponding path program 4 times [2021-06-05 22:02:17,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:17,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658507041] [2021-06-05 22:02:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:17,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658507041] [2021-06-05 22:02:17,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658507041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399724555] [2021-06-05 22:02:17,757 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 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 22:02:17,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:17,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:17,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:02:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:17,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399724555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:17,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 22:02:17,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174254652] [2021-06-05 22:02:17,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:02:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:02:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:02:17,920 INFO L87 Difference]: Start difference. First operand 215 states and 676 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:17,991 INFO L93 Difference]: Finished difference Result 355 states and 997 transitions. [2021-06-05 22:02:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:17,995 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:02:17,995 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 22:02:17,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:02:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 22:02:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 211. [2021-06-05 22:02:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1714285714285713) internal successors, (666), 210 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 666 transitions. [2021-06-05 22:02:18,002 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 666 transitions. Word has length 16 [2021-06-05 22:02:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:18,002 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 666 transitions. [2021-06-05 22:02:18,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 666 transitions. [2021-06-05 22:02:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:18,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:18,004 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:18,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:02:18,221 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash -556629742, now seen corresponding path program 5 times [2021-06-05 22:02:18,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:18,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701829693] [2021-06-05 22:02:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:18,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:18,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701829693] [2021-06-05 22:02:18,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701829693] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:18,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:18,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:18,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304950672] [2021-06-05 22:02:18,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:18,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:18,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:18,265 INFO L87 Difference]: Start difference. First operand 211 states and 666 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:18,336 INFO L93 Difference]: Finished difference Result 346 states and 975 transitions. [2021-06-05 22:02:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:18,338 INFO L225 Difference]: With dead ends: 346 [2021-06-05 22:02:18,339 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 22:02:18,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 22:02:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 211. [2021-06-05 22:02:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1619047619047618) internal successors, (664), 210 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 664 transitions. [2021-06-05 22:02:18,345 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 664 transitions. Word has length 16 [2021-06-05 22:02:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:18,345 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 664 transitions. [2021-06-05 22:02:18,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 664 transitions. [2021-06-05 22:02:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:18,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:18,346 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:18,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 22:02:18,347 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1337504340, now seen corresponding path program 6 times [2021-06-05 22:02:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:18,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004557148] [2021-06-05 22:02:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:18,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004557148] [2021-06-05 22:02:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004557148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647975259] [2021-06-05 22:02:18,378 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 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 22:02:18,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:18,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:18,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:02:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:18,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647975259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:18,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 22:02:18,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659318022] [2021-06-05 22:02:18,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:02:18,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:02:18,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:02:18,522 INFO L87 Difference]: Start difference. First operand 211 states and 664 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:18,694 INFO L93 Difference]: Finished difference Result 550 states and 1584 transitions. [2021-06-05 22:02:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:18,697 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:02:18,697 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 22:02:18,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 22:02:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 211. [2021-06-05 22:02:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1523809523809523) internal successors, (662), 210 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 662 transitions. [2021-06-05 22:02:18,705 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 662 transitions. Word has length 16 [2021-06-05 22:02:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:18,705 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 662 transitions. [2021-06-05 22:02:18,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 662 transitions. [2021-06-05 22:02:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:18,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:18,706 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:18,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:18,930 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-06-05 22:02:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:18,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326206007] [2021-06-05 22:02:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:18,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:18,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326206007] [2021-06-05 22:02:18,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326206007] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:18,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:18,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:02:18,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883485759] [2021-06-05 22:02:18,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:02:18,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:02:18,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:18,972 INFO L87 Difference]: Start difference. First operand 211 states and 662 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,025 INFO L93 Difference]: Finished difference Result 340 states and 952 transitions. [2021-06-05 22:02:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:02:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,027 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:02:19,027 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 22:02:19,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:02:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 22:02:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 203. [2021-06-05 22:02:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.118811881188119) internal successors, (630), 202 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 630 transitions. [2021-06-05 22:02:19,034 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 630 transitions. Word has length 16 [2021-06-05 22:02:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,034 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 630 transitions. [2021-06-05 22:02:19,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 630 transitions. [2021-06-05 22:02:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:02:19,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,035 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 22:02:19,035 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,035 INFO L82 PathProgramCache]: Analyzing trace with hash -682046510, now seen corresponding path program 4 times [2021-06-05 22:02:19,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955837008] [2021-06-05 22:02:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:19,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955837008] [2021-06-05 22:02:19,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955837008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:19,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:19,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:19,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830705391] [2021-06-05 22:02:19,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:19,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,053 INFO L87 Difference]: Start difference. First operand 203 states and 630 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,069 INFO L93 Difference]: Finished difference Result 240 states and 711 transitions. [2021-06-05 22:02:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:02:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,071 INFO L225 Difference]: With dead ends: 240 [2021-06-05 22:02:19,071 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 22:02:19,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:02:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 22:02:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2021-06-05 22:02:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.126315789473684) internal successors, (594), 190 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 594 transitions. [2021-06-05 22:02:19,076 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 594 transitions. Word has length 16 [2021-06-05 22:02:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,076 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 594 transitions. [2021-06-05 22:02:19,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 594 transitions. [2021-06-05 22:02:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:02:19,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,078 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 22:02:19,078 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash -720277718, now seen corresponding path program 1 times [2021-06-05 22:02:19,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610503204] [2021-06-05 22:02:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,095 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 22:02:19,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610503204] [2021-06-05 22:02:19,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610503204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:19,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:19,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:19,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17336793] [2021-06-05 22:02:19,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:19,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:19,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,100 INFO L87 Difference]: Start difference. First operand 191 states and 594 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,111 INFO L93 Difference]: Finished difference Result 281 states and 830 transitions. [2021-06-05 22:02:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:19,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:02:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,112 INFO L225 Difference]: With dead ends: 281 [2021-06-05 22:02:19,112 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 22:02:19,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 22:02:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 228. [2021-06-05 22:02:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.101321585903084) internal successors, (704), 227 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 704 transitions. [2021-06-05 22:02:19,119 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 704 transitions. Word has length 18 [2021-06-05 22:02:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,119 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 704 transitions. [2021-06-05 22:02:19,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 704 transitions. [2021-06-05 22:02:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:02:19,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,120 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 22:02:19,120 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,121 INFO L82 PathProgramCache]: Analyzing trace with hash 147207058, now seen corresponding path program 1 times [2021-06-05 22:02:19,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247636526] [2021-06-05 22:02:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,137 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 22:02:19,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247636526] [2021-06-05 22:02:19,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247636526] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:19,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:19,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:19,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397497405] [2021-06-05 22:02:19,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:19,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:19,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,138 INFO L87 Difference]: Start difference. First operand 228 states and 704 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,148 INFO L93 Difference]: Finished difference Result 295 states and 875 transitions. [2021-06-05 22:02:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:19,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:02:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,150 INFO L225 Difference]: With dead ends: 295 [2021-06-05 22:02:19,150 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 22:02:19,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 22:02:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 248. [2021-06-05 22:02:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0931174089068825) internal successors, (764), 247 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 764 transitions. [2021-06-05 22:02:19,159 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 764 transitions. Word has length 18 [2021-06-05 22:02:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,159 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 764 transitions. [2021-06-05 22:02:19,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 764 transitions. [2021-06-05 22:02:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:02:19,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,160 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 22:02:19,161 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,161 INFO L82 PathProgramCache]: Analyzing trace with hash -992379222, now seen corresponding path program 2 times [2021-06-05 22:02:19,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199861733] [2021-06-05 22:02:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,182 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 22:02:19,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199861733] [2021-06-05 22:02:19,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199861733] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:19,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:19,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:19,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641983365] [2021-06-05 22:02:19,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:19,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,184 INFO L87 Difference]: Start difference. First operand 248 states and 764 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,193 INFO L93 Difference]: Finished difference Result 256 states and 763 transitions. [2021-06-05 22:02:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:19,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:02:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,194 INFO L225 Difference]: With dead ends: 256 [2021-06-05 22:02:19,195 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 22:02:19,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 22:02:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2021-06-05 22:02:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.0142857142857142) internal successors, (633), 210 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 633 transitions. [2021-06-05 22:02:19,201 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 633 transitions. Word has length 18 [2021-06-05 22:02:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,201 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 633 transitions. [2021-06-05 22:02:19,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 633 transitions. [2021-06-05 22:02:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:02:19,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,202 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 22:02:19,202 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1817656876, now seen corresponding path program 3 times [2021-06-05 22:02:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30343693] [2021-06-05 22:02:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:02:19,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30343693] [2021-06-05 22:02:19,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30343693] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:19,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:19,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:19,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111438426] [2021-06-05 22:02:19,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:19,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,221 INFO L87 Difference]: Start difference. First operand 211 states and 633 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,228 INFO L93 Difference]: Finished difference Result 219 states and 645 transitions. [2021-06-05 22:02:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:02:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,229 INFO L225 Difference]: With dead ends: 219 [2021-06-05 22:02:19,229 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 22:02:19,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 22:02:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-06-05 22:02:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 3.0240384615384617) internal successors, (629), 208 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 629 transitions. [2021-06-05 22:02:19,238 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 629 transitions. Word has length 18 [2021-06-05 22:02:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,238 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 629 transitions. [2021-06-05 22:02:19,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 629 transitions. [2021-06-05 22:02:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:02:19,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,239 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 22:02:19,240 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1352829548, now seen corresponding path program 2 times [2021-06-05 22:02:19,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791915388] [2021-06-05 22:02:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,262 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 22:02:19,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791915388] [2021-06-05 22:02:19,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791915388] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:02:19,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:02:19,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:02:19,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611348069] [2021-06-05 22:02:19,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:02:19,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:02:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,263 INFO L87 Difference]: Start difference. First operand 209 states and 629 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,270 INFO L93 Difference]: Finished difference Result 209 states and 609 transitions. [2021-06-05 22:02:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:02:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:02:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,271 INFO L225 Difference]: With dead ends: 209 [2021-06-05 22:02:19,271 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 22:02:19,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:02:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 22:02:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 189. [2021-06-05 22:02:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 22:02:19,275 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 18 [2021-06-05 22:02:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,276 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 22:02:19,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 22:02:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:19,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,278 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 22:02:19,279 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-06-05 22:02:19,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880898158] [2021-06-05 22:02:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:19,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880898158] [2021-06-05 22:02:19,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880898158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432471239] [2021-06-05 22:02:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:02:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:02:19,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:20,360 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 22:02:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:20,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432471239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:20,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:20,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:20,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717722071] [2021-06-05 22:02:20,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:20,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:20,506 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:20,781 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 22:02:20,970 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 22:02:21,149 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 22:02:21,348 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 22:02:21,566 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 22:02:21,730 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 22:02:21,956 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 22:02:22,190 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 22:02:22,493 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 22:02:22,630 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 22:02:22,809 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 22:02:23,053 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 22:02:23,251 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-05 22:02:23,463 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 22:02:23,697 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2021-06-05 22:02:23,947 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 22:02:24,145 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 22:02:24,563 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-06-05 22:02:24,823 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2021-06-05 22:02:24,998 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2021-06-05 22:02:25,167 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 22:02:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:25,195 INFO L93 Difference]: Finished difference Result 856 states and 2361 transitions. [2021-06-05 22:02:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:02:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:25,199 INFO L225 Difference]: With dead ends: 856 [2021-06-05 22:02:25,199 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 22:02:25,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 4707.5ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:02:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 22:02:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 295. [2021-06-05 22:02:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-06-05 22:02:25,209 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 20 [2021-06-05 22:02:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:25,209 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-06-05 22:02:25,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-06-05 22:02:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:25,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:25,210 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:25,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:02:25,425 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash 754443394, now seen corresponding path program 2 times [2021-06-05 22:02:25,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:25,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587083739] [2021-06-05 22:02:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:25,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:25,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587083739] [2021-06-05 22:02:25,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587083739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:25,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707437664] [2021-06-05 22:02:25,663 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 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 22:02:25,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:02:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:26,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707437664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:26,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:26,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529523998] [2021-06-05 22:02:26,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:26,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:26,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:26,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:26,369 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:26,753 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:02:26,970 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:02:27,215 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 22:02:27,441 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 22:02:27,643 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 22:02:27,809 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-06-05 22:02:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:27,939 INFO L93 Difference]: Finished difference Result 687 states and 1961 transitions. [2021-06-05 22:02:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:02:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:27,942 INFO L225 Difference]: With dead ends: 687 [2021-06-05 22:02:27,942 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 22:02:27,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1748.1ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:02:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 22:02:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 301. [2021-06-05 22:02:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.07) internal successors, (921), 300 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 921 transitions. [2021-06-05 22:02:27,950 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 921 transitions. Word has length 20 [2021-06-05 22:02:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:27,950 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 921 transitions. [2021-06-05 22:02:27,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 921 transitions. [2021-06-05 22:02:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:27,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:27,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:28,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:02:28,165 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:28,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1024333752, now seen corresponding path program 3 times [2021-06-05 22:02:28,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:28,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780744116] [2021-06-05 22:02:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:28,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:28,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780744116] [2021-06-05 22:02:28,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780744116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:28,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955207635] [2021-06-05 22:02:28,450 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 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 22:02:28,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:28,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:02:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955207635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:29,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:29,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213417668] [2021-06-05 22:02:29,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:29,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:29,252 INFO L87 Difference]: Start difference. First operand 301 states and 921 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:29,475 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 22:02:29,642 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2021-06-05 22:02:29,865 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 22:02:30,420 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 22:02:30,707 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 22:02:31,102 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2021-06-05 22:02:31,313 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-06-05 22:02:31,455 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 22:02:31,717 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2021-06-05 22:02:32,024 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 22:02:32,387 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-06-05 22:02:32,726 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-05 22:02:33,063 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2021-06-05 22:02:33,490 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2021-06-05 22:02:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:33,501 INFO L93 Difference]: Finished difference Result 973 states and 2771 transitions. [2021-06-05 22:02:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:02:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:33,505 INFO L225 Difference]: With dead ends: 973 [2021-06-05 22:02:33,505 INFO L226 Difference]: Without dead ends: 898 [2021-06-05 22:02:33,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4454.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:02:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-05 22:02:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 345. [2021-06-05 22:02:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.2063953488372094) internal successors, (1103), 344 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1103 transitions. [2021-06-05 22:02:33,527 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1103 transitions. Word has length 20 [2021-06-05 22:02:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:33,527 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1103 transitions. [2021-06-05 22:02:33,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1103 transitions. [2021-06-05 22:02:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:33,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:33,528 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:33,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:33,745 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:33,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:33,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1737852718, now seen corresponding path program 4 times [2021-06-05 22:02:33,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:33,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811246019] [2021-06-05 22:02:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:33,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:33,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811246019] [2021-06-05 22:02:33,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811246019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:33,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395042207] [2021-06-05 22:02:33,964 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 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 22:02:34,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:02:34,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:34,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395042207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:34,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:34,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:34,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307265328] [2021-06-05 22:02:34,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:34,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:34,618 INFO L87 Difference]: Start difference. First operand 345 states and 1103 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:35,054 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 22:02:35,225 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 22:02:35,435 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 22:02:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:35,471 INFO L93 Difference]: Finished difference Result 699 states and 2080 transitions. [2021-06-05 22:02:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:35,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:35,474 INFO L225 Difference]: With dead ends: 699 [2021-06-05 22:02:35,474 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 22:02:35,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1085.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 22:02:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 353. [2021-06-05 22:02:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.215909090909091) internal successors, (1132), 352 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1132 transitions. [2021-06-05 22:02:35,483 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1132 transitions. Word has length 20 [2021-06-05 22:02:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:35,483 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1132 transitions. [2021-06-05 22:02:35,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1132 transitions. [2021-06-05 22:02:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:35,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:35,485 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:35,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:35,707 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:35,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1376626424, now seen corresponding path program 5 times [2021-06-05 22:02:35,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:35,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994712523] [2021-06-05 22:02:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:35,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:35,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994712523] [2021-06-05 22:02:35,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994712523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:35,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422744755] [2021-06-05 22:02:35,935 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 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 22:02:35,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:35,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:35,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:02:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:36,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422744755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:36,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:36,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:02:36,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914183943] [2021-06-05 22:02:36,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:02:36,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:02:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:02:36,624 INFO L87 Difference]: Start difference. First operand 353 states and 1132 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:02:37,603 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-06-05 22:02:37,956 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 22:02:38,487 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 22:02:38,727 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 22:02:38,949 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-05 22:02:39,170 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-06-05 22:02:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:39,190 INFO L93 Difference]: Finished difference Result 722 states and 2202 transitions. [2021-06-05 22:02:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:02:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:02:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:39,194 INFO L225 Difference]: With dead ends: 722 [2021-06-05 22:02:39,194 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 22:02:39,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2633.1ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:02:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 22:02:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 366. [2021-06-05 22:02:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.23013698630137) internal successors, (1179), 365 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1179 transitions. [2021-06-05 22:02:39,207 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1179 transitions. Word has length 20 [2021-06-05 22:02:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:39,207 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1179 transitions. [2021-06-05 22:02:39,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:02:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1179 transitions. [2021-06-05 22:02:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:39,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:39,209 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:39,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:39,421 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash -191544444, now seen corresponding path program 6 times [2021-06-05 22:02:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:39,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481277156] [2021-06-05 22:02:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:39,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:39,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481277156] [2021-06-05 22:02:39,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481277156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:39,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354175601] [2021-06-05 22:02:39,654 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 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 22:02:39,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:39,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:39,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:02:39,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:40,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354175601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:40,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:40,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:40,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443359465] [2021-06-05 22:02:40,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:40,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:40,390 INFO L87 Difference]: Start difference. First operand 366 states and 1179 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:40,655 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 22:02:40,927 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 22:02:41,143 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 22:02:41,624 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 22:02:41,770 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 22:02:41,949 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-05 22:02:42,093 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-05 22:02:42,362 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 22:02:42,622 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 22:02:42,829 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 22:02:42,975 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 22:02:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:43,094 INFO L93 Difference]: Finished difference Result 857 states and 2475 transitions. [2021-06-05 22:02:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:02:43,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:43,097 INFO L225 Difference]: With dead ends: 857 [2021-06-05 22:02:43,097 INFO L226 Difference]: Without dead ends: 782 [2021-06-05 22:02:43,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2827.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:02:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-05 22:02:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 384. [2021-06-05 22:02:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.2767624020887727) internal successors, (1255), 383 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1255 transitions. [2021-06-05 22:02:43,106 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1255 transitions. Word has length 20 [2021-06-05 22:02:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:43,107 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1255 transitions. [2021-06-05 22:02:43,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1255 transitions. [2021-06-05 22:02:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:43,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:43,108 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:43,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:43,315 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:43,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1568508496, now seen corresponding path program 7 times [2021-06-05 22:02:43,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:43,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8362494] [2021-06-05 22:02:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:43,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:43,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8362494] [2021-06-05 22:02:43,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8362494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:43,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632758155] [2021-06-05 22:02:43,536 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 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 22:02:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:02:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:43,969 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 22:02:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:44,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632758155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:44,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:44,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:44,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487265603] [2021-06-05 22:02:44,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:44,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:44,317 INFO L87 Difference]: Start difference. First operand 384 states and 1255 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:44,935 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 22:02:45,353 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 22:02:45,764 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 22:02:46,213 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 22:02:46,481 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 22:02:46,937 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-05 22:02:47,192 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-05 22:02:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:47,222 INFO L93 Difference]: Finished difference Result 878 states and 2615 transitions. [2021-06-05 22:02:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:02:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:47,225 INFO L225 Difference]: With dead ends: 878 [2021-06-05 22:02:47,226 INFO L226 Difference]: Without dead ends: 788 [2021-06-05 22:02:47,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 3156.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:02:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-06-05 22:02:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 400. [2021-06-05 22:02:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.2907268170426067) internal successors, (1313), 399 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1313 transitions. [2021-06-05 22:02:47,236 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1313 transitions. Word has length 20 [2021-06-05 22:02:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:47,236 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1313 transitions. [2021-06-05 22:02:47,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1313 transitions. [2021-06-05 22:02:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:47,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:47,238 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:47,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:47,457 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1496336488, now seen corresponding path program 8 times [2021-06-05 22:02:47,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:47,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868307943] [2021-06-05 22:02:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:47,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:47,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868307943] [2021-06-05 22:02:47,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868307943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:47,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558216302] [2021-06-05 22:02:47,642 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 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 22:02:47,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:47,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:47,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:02:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558216302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:48,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:48,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:48,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231508351] [2021-06-05 22:02:48,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:48,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:48,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:48,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:48,193 INFO L87 Difference]: Start difference. First operand 400 states and 1313 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:48,641 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 22:02:48,927 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 22:02:49,080 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 22:02:49,234 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 22:02:49,476 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 22:02:49,609 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 22:02:49,784 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 22:02:50,059 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 22:02:50,323 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-05 22:02:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:50,352 INFO L93 Difference]: Finished difference Result 925 states and 2706 transitions. [2021-06-05 22:02:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:50,355 INFO L225 Difference]: With dead ends: 925 [2021-06-05 22:02:50,355 INFO L226 Difference]: Without dead ends: 850 [2021-06-05 22:02:50,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2207.5ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-05 22:02:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 483. [2021-06-05 22:02:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.288381742738589) internal successors, (1585), 482 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1585 transitions. [2021-06-05 22:02:50,367 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1585 transitions. Word has length 20 [2021-06-05 22:02:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:50,367 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1585 transitions. [2021-06-05 22:02:50,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1585 transitions. [2021-06-05 22:02:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:50,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:50,369 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:50,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:50,585 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2112101588, now seen corresponding path program 9 times [2021-06-05 22:02:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:50,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838837689] [2021-06-05 22:02:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:50,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:50,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838837689] [2021-06-05 22:02:50,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838837689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083537464] [2021-06-05 22:02:50,886 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 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 22:02:50,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:02:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083537464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:51,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:51,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503889065] [2021-06-05 22:02:51,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:51,568 INFO L87 Difference]: Start difference. First operand 483 states and 1585 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:51,899 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 22:02:52,065 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-06-05 22:02:52,219 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 22:02:52,537 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 22:02:52,768 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-06-05 22:02:52,922 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 22:02:53,166 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-06-05 22:02:53,319 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 22:02:53,502 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 22:02:53,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:53,503 INFO L93 Difference]: Finished difference Result 850 states and 2608 transitions. [2021-06-05 22:02:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:53,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:53,506 INFO L225 Difference]: With dead ends: 850 [2021-06-05 22:02:53,506 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 22:02:53,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2256.4ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:02:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 22:02:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 495. [2021-06-05 22:02:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.289473684210526) internal successors, (1625), 494 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1625 transitions. [2021-06-05 22:02:53,517 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1625 transitions. Word has length 20 [2021-06-05 22:02:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:53,517 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1625 transitions. [2021-06-05 22:02:53,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1625 transitions. [2021-06-05 22:02:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:53,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:53,518 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:53,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-05 22:02:53,741 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -997783728, now seen corresponding path program 10 times [2021-06-05 22:02:53,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138857555] [2021-06-05 22:02:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:53,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:53,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138857555] [2021-06-05 22:02:53,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138857555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:53,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035459975] [2021-06-05 22:02:53,984 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 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 22:02:54,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:54,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:02:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:54,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035459975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:54,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:54,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:54,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850036996] [2021-06-05 22:02:54,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:54,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:54,564 INFO L87 Difference]: Start difference. First operand 495 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,218 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 22:02:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:55,244 INFO L93 Difference]: Finished difference Result 819 states and 2546 transitions. [2021-06-05 22:02:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:55,248 INFO L225 Difference]: With dead ends: 819 [2021-06-05 22:02:55,248 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 22:02:55,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 962.1ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 22:02:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 496. [2021-06-05 22:02:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.294949494949495) internal successors, (1631), 495 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1631 transitions. [2021-06-05 22:02:55,259 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1631 transitions. Word has length 20 [2021-06-05 22:02:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:55,259 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1631 transitions. [2021-06-05 22:02:55,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1631 transitions. [2021-06-05 22:02:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:55,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:55,261 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:55,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:55,484 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1938132120, now seen corresponding path program 11 times [2021-06-05 22:02:55,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:55,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73748366] [2021-06-05 22:02:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:55,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73748366] [2021-06-05 22:02:55,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73748366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018623547] [2021-06-05 22:02:55,736 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 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 22:02:55,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:55,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:02:55,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018623547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:56,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:56,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:02:56,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687769920] [2021-06-05 22:02:56,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:02:56,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:56,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:02:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:02:56,330 INFO L87 Difference]: Start difference. First operand 496 states and 1631 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:02:56,652 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:02:56,905 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 22:02:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:57,010 INFO L93 Difference]: Finished difference Result 724 states and 2271 transitions. [2021-06-05 22:02:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:57,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:02:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:57,014 INFO L225 Difference]: With dead ends: 724 [2021-06-05 22:02:57,014 INFO L226 Difference]: Without dead ends: 709 [2021-06-05 22:02:57,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1028.2ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-06-05 22:02:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 496. [2021-06-05 22:02:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.294949494949495) internal successors, (1631), 495 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1631 transitions. [2021-06-05 22:02:57,025 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1631 transitions. Word has length 20 [2021-06-05 22:02:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:57,025 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1631 transitions. [2021-06-05 22:02:57,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:02:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1631 transitions. [2021-06-05 22:02:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:57,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:57,026 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:57,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 22:02:57,249 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash 762269212, now seen corresponding path program 12 times [2021-06-05 22:02:57,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:57,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117138138] [2021-06-05 22:02:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:57,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117138138] [2021-06-05 22:02:57,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117138138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720872909] [2021-06-05 22:02:57,451 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 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 22:02:57,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:02:57,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:57,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:02:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:57,859 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 22:02:58,068 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 22:02:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:58,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720872909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:58,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:58,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:02:58,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332109307] [2021-06-05 22:02:58,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:02:58,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:58,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:02:58,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:58,240 INFO L87 Difference]: Start difference. First operand 496 states and 1631 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:59,026 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2021-06-05 22:02:59,422 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 22:02:59,729 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 22:02:59,918 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-05 22:03:00,302 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 22:03:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:00,348 INFO L93 Difference]: Finished difference Result 914 states and 2862 transitions. [2021-06-05 22:03:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:00,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:00,359 INFO L225 Difference]: With dead ends: 914 [2021-06-05 22:03:00,359 INFO L226 Difference]: Without dead ends: 869 [2021-06-05 22:03:00,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2454.2ms TimeCoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:03:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-06-05 22:03:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 518. [2021-06-05 22:03:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.2959381044487426) internal successors, (1704), 517 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1704 transitions. [2021-06-05 22:03:00,369 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1704 transitions. Word has length 20 [2021-06-05 22:03:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:00,369 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1704 transitions. [2021-06-05 22:03:00,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1704 transitions. [2021-06-05 22:03:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:00,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:00,370 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:00,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 22:03:00,583 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:00,583 INFO L82 PathProgramCache]: Analyzing trace with hash 174296510, now seen corresponding path program 13 times [2021-06-05 22:03:00,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:00,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051926227] [2021-06-05 22:03:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:00,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:00,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051926227] [2021-06-05 22:03:00,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051926227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:00,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714779122] [2021-06-05 22:03:00,820 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 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 22:03:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714779122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:01,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:01,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584670433] [2021-06-05 22:03:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:01,366 INFO L87 Difference]: Start difference. First operand 518 states and 1704 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:01,708 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 22:03:02,021 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 22:03:02,302 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 22:03:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:02,324 INFO L93 Difference]: Finished difference Result 781 states and 2418 transitions. [2021-06-05 22:03:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:03:02,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:02,325 INFO L225 Difference]: With dead ends: 781 [2021-06-05 22:03:02,326 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 22:03:02,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1272.0ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 22:03:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 521. [2021-06-05 22:03:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.3038461538461537) internal successors, (1718), 520 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1718 transitions. [2021-06-05 22:03:02,335 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1718 transitions. Word has length 20 [2021-06-05 22:03:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:02,335 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1718 transitions. [2021-06-05 22:03:02,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1718 transitions. [2021-06-05 22:03:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:02,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:02,337 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:02,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 22:03:02,559 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1147131350, now seen corresponding path program 14 times [2021-06-05 22:03:02,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:02,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890714384] [2021-06-05 22:03:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:02,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890714384] [2021-06-05 22:03:02,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890714384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256065004] [2021-06-05 22:03:02,810 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 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 22:03:02,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:03:02,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:03,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256065004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:03,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:03,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:03,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335159585] [2021-06-05 22:03:03,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:03,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:03,529 INFO L87 Difference]: Start difference. First operand 521 states and 1718 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:03,727 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 22:03:04,269 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 22:03:04,428 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 22:03:04,838 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 22:03:05,323 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2021-06-05 22:03:05,525 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 22:03:06,045 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-06-05 22:03:06,295 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-06-05 22:03:06,936 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2021-06-05 22:03:07,225 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2021-06-05 22:03:07,529 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2021-06-05 22:03:07,853 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 60 [2021-06-05 22:03:08,418 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-06-05 22:03:08,740 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-06-05 22:03:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:08,746 INFO L93 Difference]: Finished difference Result 1138 states and 3464 transitions. [2021-06-05 22:03:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:03:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:08,749 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 22:03:08,749 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 22:03:08,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 5355.7ms TimeCoverageRelationStatistics Valid=390, Invalid=1502, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:03:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 22:03:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 536. [2021-06-05 22:03:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 3.317757009345794) internal successors, (1775), 535 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1775 transitions. [2021-06-05 22:03:08,762 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1775 transitions. Word has length 20 [2021-06-05 22:03:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:08,762 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1775 transitions. [2021-06-05 22:03:08,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1775 transitions. [2021-06-05 22:03:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:08,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:08,764 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:08,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 22:03:08,985 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:08,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1087596476, now seen corresponding path program 15 times [2021-06-05 22:03:08,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:08,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968503136] [2021-06-05 22:03:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:09,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:09,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968503136] [2021-06-05 22:03:09,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968503136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:09,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464421731] [2021-06-05 22:03:09,179 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 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 22:03:09,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:09,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:09,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:03:09,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:09,810 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 22:03:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464421731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:09,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:09,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:09,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240322805] [2021-06-05 22:03:09,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:09,926 INFO L87 Difference]: Start difference. First operand 536 states and 1775 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:10,286 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 22:03:10,529 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 22:03:10,797 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-05 22:03:11,019 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-06-05 22:03:11,343 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-06-05 22:03:11,513 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 22:03:11,719 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 22:03:12,016 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-06-05 22:03:12,193 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 22:03:12,466 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-05 22:03:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:12,476 INFO L93 Difference]: Finished difference Result 1144 states and 3484 transitions. [2021-06-05 22:03:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:03:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:12,478 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 22:03:12,478 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 22:03:12,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2846.2ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:03:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 22:03:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 551. [2021-06-05 22:03:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.350909090909091) internal successors, (1843), 550 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1843 transitions. [2021-06-05 22:03:12,490 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1843 transitions. Word has length 20 [2021-06-05 22:03:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:12,490 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1843 transitions. [2021-06-05 22:03:12,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1843 transitions. [2021-06-05 22:03:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:12,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:12,491 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:12,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:12,709 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:12,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1635816502, now seen corresponding path program 16 times [2021-06-05 22:03:12,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:12,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355459577] [2021-06-05 22:03:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:12,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:12,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355459577] [2021-06-05 22:03:12,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355459577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:12,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462167033] [2021-06-05 22:03:12,929 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 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 22:03:12,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:12,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462167033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:13,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095556340] [2021-06-05 22:03:13,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:13,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:13,603 INFO L87 Difference]: Start difference. First operand 551 states and 1843 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:13,954 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 22:03:14,378 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 22:03:14,610 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 22:03:14,887 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 22:03:15,026 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 22:03:15,190 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 22:03:15,497 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 22:03:15,682 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 22:03:15,890 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 22:03:16,112 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 22:03:16,295 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 22:03:16,452 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:03:16,740 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 22:03:17,044 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 22:03:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:17,096 INFO L93 Difference]: Finished difference Result 1251 states and 3883 transitions. [2021-06-05 22:03:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:03:17,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:17,098 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 22:03:17,098 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 22:03:17,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3566.5ms TimeCoverageRelationStatistics Valid=367, Invalid=1525, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:03:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 22:03:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 578. [2021-06-05 22:03:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 3.4003466204506068) internal successors, (1962), 577 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1962 transitions. [2021-06-05 22:03:17,112 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1962 transitions. Word has length 20 [2021-06-05 22:03:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:17,112 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1962 transitions. [2021-06-05 22:03:17,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1962 transitions. [2021-06-05 22:03:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:17,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:17,113 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:17,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-05 22:03:17,325 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:17,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 17 times [2021-06-05 22:03:17,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:17,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947892710] [2021-06-05 22:03:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:17,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:17,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947892710] [2021-06-05 22:03:17,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947892710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731765132] [2021-06-05 22:03:17,551 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 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 22:03:17,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:17,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:03:17,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:18,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731765132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:18,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:03:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621356528] [2021-06-05 22:03:18,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:03:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:03:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:18,136 INFO L87 Difference]: Start difference. First operand 578 states and 1962 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:03:18,899 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 22:03:19,224 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 22:03:19,429 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 22:03:19,586 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 22:03:19,999 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 22:03:20,194 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 22:03:20,421 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 22:03:20,601 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 22:03:20,938 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-05 22:03:21,190 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-06-05 22:03:21,404 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-05 22:03:21,674 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-06-05 22:03:22,185 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-06-05 22:03:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:22,238 INFO L93 Difference]: Finished difference Result 1136 states and 3546 transitions. [2021-06-05 22:03:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:03:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:03:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:22,240 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:03:22,240 INFO L226 Difference]: Without dead ends: 1121 [2021-06-05 22:03:22,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 4053.0ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:03:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-05 22:03:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 587. [2021-06-05 22:03:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.3890784982935154) internal successors, (1986), 586 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1986 transitions. [2021-06-05 22:03:22,252 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1986 transitions. Word has length 20 [2021-06-05 22:03:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:22,253 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1986 transitions. [2021-06-05 22:03:22,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:03:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1986 transitions. [2021-06-05 22:03:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:22,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:22,254 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:22,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 22:03:22,458 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash 598607746, now seen corresponding path program 18 times [2021-06-05 22:03:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:22,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987168329] [2021-06-05 22:03:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987168329] [2021-06-05 22:03:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987168329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845406991] [2021-06-05 22:03:22,669 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 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 22:03:22,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:22,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:22,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:22,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:23,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845406991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:23,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:23,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402147636] [2021-06-05 22:03:23,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:23,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:23,266 INFO L87 Difference]: Start difference. First operand 587 states and 1986 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:23,651 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 22:03:23,811 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 22:03:24,029 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-05 22:03:24,277 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 22:03:24,509 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-06-05 22:03:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:24,523 INFO L93 Difference]: Finished difference Result 899 states and 2812 transitions. [2021-06-05 22:03:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:03:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:24,525 INFO L225 Difference]: With dead ends: 899 [2021-06-05 22:03:24,525 INFO L226 Difference]: Without dead ends: 854 [2021-06-05 22:03:24,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1516.0ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-06-05 22:03:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 602. [2021-06-05 22:03:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.3910149750415974) internal successors, (2038), 601 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 2038 transitions. [2021-06-05 22:03:24,537 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 2038 transitions. Word has length 20 [2021-06-05 22:03:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:24,538 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 2038 transitions. [2021-06-05 22:03:24,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 2038 transitions. [2021-06-05 22:03:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:24,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:24,539 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:24,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:24,745 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash 109805262, now seen corresponding path program 19 times [2021-06-05 22:03:24,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:24,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971657951] [2021-06-05 22:03:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971657951] [2021-06-05 22:03:24,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971657951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275019440] [2021-06-05 22:03:24,930 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 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 22:03:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:03:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:25,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275019440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:25,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:25,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:25,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121413854] [2021-06-05 22:03:25,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:25,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:25,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:25,574 INFO L87 Difference]: Start difference. First operand 602 states and 2038 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:26,133 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-05 22:03:26,279 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 22:03:26,482 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 22:03:26,826 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 22:03:27,078 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 22:03:27,389 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 22:03:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:27,519 INFO L93 Difference]: Finished difference Result 1090 states and 3379 transitions. [2021-06-05 22:03:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:03:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:27,521 INFO L225 Difference]: With dead ends: 1090 [2021-06-05 22:03:27,521 INFO L226 Difference]: Without dead ends: 1045 [2021-06-05 22:03:27,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2185.3ms TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:03:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-05 22:03:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 617. [2021-06-05 22:03:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 3.387987012987013) internal successors, (2087), 616 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 2087 transitions. [2021-06-05 22:03:27,535 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 2087 transitions. Word has length 20 [2021-06-05 22:03:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:27,535 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 2087 transitions. [2021-06-05 22:03:27,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 2087 transitions. [2021-06-05 22:03:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:27,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:27,536 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:27,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 22:03:27,759 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:27,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1227590060, now seen corresponding path program 20 times [2021-06-05 22:03:27,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:27,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672129748] [2021-06-05 22:03:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:27,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:27,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672129748] [2021-06-05 22:03:27,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672129748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532355273] [2021-06-05 22:03:27,935 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 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 22:03:27,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:27,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:27,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532355273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:28,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:28,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:28,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679942071] [2021-06-05 22:03:28,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:28,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:28,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:28,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:28,467 INFO L87 Difference]: Start difference. First operand 617 states and 2087 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:29,221 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 22:03:29,405 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 22:03:29,558 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-05 22:03:29,786 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 22:03:30,072 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 22:03:30,348 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 22:03:30,598 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 22:03:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:30,618 INFO L93 Difference]: Finished difference Result 1189 states and 3576 transitions. [2021-06-05 22:03:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:30,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:30,621 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 22:03:30,621 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 22:03:30,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2297.2ms TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:03:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 22:03:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 616. [2021-06-05 22:03:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.3821138211382116) internal successors, (2080), 615 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2080 transitions. [2021-06-05 22:03:30,635 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2080 transitions. Word has length 20 [2021-06-05 22:03:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:30,635 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 2080 transitions. [2021-06-05 22:03:30,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2080 transitions. [2021-06-05 22:03:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:30,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:30,636 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:30,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:30,859 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1673593458, now seen corresponding path program 21 times [2021-06-05 22:03:30,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:30,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678317804] [2021-06-05 22:03:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678317804] [2021-06-05 22:03:31,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678317804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472735501] [2021-06-05 22:03:31,060 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 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 22:03:31,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:31,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:31,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472735501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:31,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:31,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630614079] [2021-06-05 22:03:31,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:31,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:31,668 INFO L87 Difference]: Start difference. First operand 616 states and 2080 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,223 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 22:03:32,422 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-06-05 22:03:32,572 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-05 22:03:32,739 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 22:03:32,987 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-05 22:03:33,221 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-05 22:03:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:33,233 INFO L93 Difference]: Finished difference Result 900 states and 2836 transitions. [2021-06-05 22:03:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:03:33,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:33,235 INFO L225 Difference]: With dead ends: 900 [2021-06-05 22:03:33,235 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 22:03:33,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1913.0ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:03:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 22:03:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 610. [2021-06-05 22:03:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.3842364532019706) internal successors, (2061), 609 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 2061 transitions. [2021-06-05 22:03:33,243 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 2061 transitions. Word has length 20 [2021-06-05 22:03:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:33,244 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 2061 transitions. [2021-06-05 22:03:33,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 2061 transitions. [2021-06-05 22:03:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:33,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:33,245 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:33,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable472 [2021-06-05 22:03:33,445 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1184790974, now seen corresponding path program 22 times [2021-06-05 22:03:33,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:33,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619712878] [2021-06-05 22:03:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619712878] [2021-06-05 22:03:33,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619712878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114040834] [2021-06-05 22:03:33,626 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 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 22:03:33,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:33,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:03:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:34,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114040834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:34,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:34,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:03:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327539476] [2021-06-05 22:03:34,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:03:34,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:34,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:03:34,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:34,254 INFO L87 Difference]: Start difference. First operand 610 states and 2061 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,194 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 22:03:35,418 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 22:03:35,643 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 22:03:35,809 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 22:03:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:35,929 INFO L93 Difference]: Finished difference Result 1037 states and 3230 transitions. [2021-06-05 22:03:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:03:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:35,931 INFO L225 Difference]: With dead ends: 1037 [2021-06-05 22:03:35,931 INFO L226 Difference]: Without dead ends: 1007 [2021-06-05 22:03:35,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1885.8ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-05 22:03:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 607. [2021-06-05 22:03:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 3.387788778877888) internal successors, (2053), 606 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 2053 transitions. [2021-06-05 22:03:35,945 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 2053 transitions. Word has length 20 [2021-06-05 22:03:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:35,945 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 2053 transitions. [2021-06-05 22:03:35,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 2053 transitions. [2021-06-05 22:03:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:35,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:35,946 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:36,169 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2080320032, now seen corresponding path program 23 times [2021-06-05 22:03:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:36,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000826004] [2021-06-05 22:03:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:36,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000826004] [2021-06-05 22:03:36,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000826004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291327071] [2021-06-05 22:03:36,386 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 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 22:03:36,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:36,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:03:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291327071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:36,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:03:36,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319831895] [2021-06-05 22:03:36,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:03:36,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:36,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:03:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:36,914 INFO L87 Difference]: Start difference. First operand 607 states and 2053 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:03:37,527 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 22:03:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:37,623 INFO L93 Difference]: Finished difference Result 824 states and 2659 transitions. [2021-06-05 22:03:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:03:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:37,624 INFO L225 Difference]: With dead ends: 824 [2021-06-05 22:03:37,624 INFO L226 Difference]: Without dead ends: 794 [2021-06-05 22:03:37,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 994.8ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:03:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-06-05 22:03:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 616. [2021-06-05 22:03:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.401626016260163) internal successors, (2092), 615 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2092 transitions. [2021-06-05 22:03:37,632 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2092 transitions. Word has length 20 [2021-06-05 22:03:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:37,632 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 2092 transitions. [2021-06-05 22:03:37,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:03:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2092 transitions. [2021-06-05 22:03:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:37,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:37,633 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:37,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-05 22:03:37,834 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1998920976, now seen corresponding path program 24 times [2021-06-05 22:03:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:37,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505075614] [2021-06-05 22:03:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:38,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:38,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505075614] [2021-06-05 22:03:38,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505075614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:38,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080442214] [2021-06-05 22:03:38,045 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 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 22:03:38,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:38,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:38,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,448 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:38,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,456 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:38,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,464 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:38,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,475 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:38,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,482 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:38,483 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,489 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:38,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,497 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:38,498 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,505 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:38,507 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,513 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:38,514 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,521 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:38,522 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,530 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:38,531 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,537 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:38,538 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,545 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:38,546 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,558 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:38,559 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,565 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:38,566 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,574 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:38,575 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,581 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:38,582 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,588 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:38,589 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,596 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:38,597 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,605 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:38,606 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,613 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:38,614 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,620 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:38,621 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,627 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:38,628 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,637 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:38,638 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:38,643 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:38,644 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:38,995 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 22:03:38,996 INFO L628 ElimStorePlain]: treesize reduction 92, result has 76.5 percent of original size [2021-06-05 22:03:39,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:03:39,004 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:971, output treesize:300 [2021-06-05 22:03:39,337 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-06-05 22:03:40,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:40,428 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:40,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:40,528 INFO L628 ElimStorePlain]: treesize reduction 71, result has 60.1 percent of original size [2021-06-05 22:03:40,529 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-06-05 22:03:40,533 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 4 treesize of output 2 [2021-06-05 22:03:40,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:40,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:40,583 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 5 treesize of output 1 [2021-06-05 22:03:40,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:40,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:40,625 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-06-05 22:03:40,627 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 6 treesize of output 2 [2021-06-05 22:03:40,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:40,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:40,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:03:40,669 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:210, output treesize:92 [2021-06-05 22:03:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:40,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080442214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:40,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:03:40,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763856245] [2021-06-05 22:03:40,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:03:40,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:40,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:03:40,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:40,830 INFO L87 Difference]: Start difference. First operand 616 states and 2092 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,303 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-06-05 22:03:41,603 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-06-05 22:03:42,012 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 62 [2021-06-05 22:03:42,418 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2021-06-05 22:03:42,779 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-06-05 22:03:43,185 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2021-06-05 22:03:43,617 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 77 [2021-06-05 22:03:44,021 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-06-05 22:03:44,479 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2021-06-05 22:03:44,911 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 86 [2021-06-05 22:03:45,322 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 74 [2021-06-05 22:03:45,709 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 77 [2021-06-05 22:03:45,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:45,737 INFO L93 Difference]: Finished difference Result 1084 states and 3412 transitions. [2021-06-05 22:03:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:03:45,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:45,739 INFO L225 Difference]: With dead ends: 1084 [2021-06-05 22:03:45,739 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 22:03:45,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 5449.7ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:03:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 22:03:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 632. [2021-06-05 22:03:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.380348652931854) internal successors, (2133), 631 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2133 transitions. [2021-06-05 22:03:45,750 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2133 transitions. Word has length 20 [2021-06-05 22:03:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:45,750 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2133 transitions. [2021-06-05 22:03:45,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2133 transitions. [2021-06-05 22:03:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:45,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:45,752 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:45,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 22:03:45,957 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash -998509850, now seen corresponding path program 25 times [2021-06-05 22:03:45,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:45,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559369032] [2021-06-05 22:03:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:46,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559369032] [2021-06-05 22:03:46,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559369032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948598701] [2021-06-05 22:03:46,180 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 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 22:03:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,735 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:46,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,742 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:46,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,751 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:46,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,758 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:46,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,764 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:46,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,772 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:46,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,779 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:46,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,785 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:46,786 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,792 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:46,793 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,798 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:46,799 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,805 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:46,806 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,813 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:46,814 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,820 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:46,821 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,827 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:46,828 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,834 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:46,835 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,842 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:46,842 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,848 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:46,849 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,855 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:46,856 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,861 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:46,862 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,867 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:46,868 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:47,043 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 22:03:47,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:47,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:03:47,049 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:869, output treesize:350 [2021-06-05 22:03:47,364 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2021-06-05 22:03:48,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:48,528 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:48,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:48,854 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 85 [2021-06-05 22:03:48,854 INFO L628 ElimStorePlain]: treesize reduction 327, result has 44.1 percent of original size [2021-06-05 22:03:48,854 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-06-05 22:03:48,859 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 4 treesize of output 2 [2021-06-05 22:03:48,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:48,990 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:03:48,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:48,991 INFO L518 ElimStorePlain]: Eliminatee v_prenex_14 vanished before elimination [2021-06-05 22:03:48,997 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 3 treesize of output 1 [2021-06-05 22:03:49,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,134 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:03:49,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:49,135 INFO L518 ElimStorePlain]: Eliminatee v_prenex_12 vanished before elimination [2021-06-05 22:03:49,147 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 3 treesize of output 1 [2021-06-05 22:03:49,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,273 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 22:03:49,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:49,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-06-05 22:03:49,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_18 vanished before elimination [2021-06-05 22:03:49,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-05 22:03:49,278 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 4 treesize of output 2 [2021-06-05 22:03:49,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,401 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 22:03:49,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:49,405 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 4 treesize of output 2 [2021-06-05 22:03:49,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,527 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 22:03:49,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:49,531 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 3 treesize of output 1 [2021-06-05 22:03:49,532 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,652 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 22:03:49,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:49,656 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 4 treesize of output 2 [2021-06-05 22:03:49,658 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,777 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 22:03:49,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:49,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-06-05 22:03:49,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_21 vanished before elimination [2021-06-05 22:03:49,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:03:49,785 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:593, output treesize:201 [2021-06-05 22:03:49,930 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 22:03:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:50,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948598701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:50,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:50,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:03:50,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344858532] [2021-06-05 22:03:50,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:03:50,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:50,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:03:50,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:50,207 INFO L87 Difference]: Start difference. First operand 632 states and 2133 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:50,886 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 22:03:51,138 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 22:03:51,366 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-06-05 22:03:51,733 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-05 22:03:51,952 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-06-05 22:03:52,189 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 22:03:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:52,204 INFO L93 Difference]: Finished difference Result 901 states and 2893 transitions. [2021-06-05 22:03:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:03:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:52,206 INFO L225 Difference]: With dead ends: 901 [2021-06-05 22:03:52,206 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 22:03:52,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2573.3ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:03:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 22:03:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 629. [2021-06-05 22:03:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.378980891719745) internal successors, (2122), 628 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2122 transitions. [2021-06-05 22:03:52,214 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2122 transitions. Word has length 20 [2021-06-05 22:03:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:52,214 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2122 transitions. [2021-06-05 22:03:52,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2122 transitions. [2021-06-05 22:03:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:52,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:52,215 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:52,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-05 22:03:52,416 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:52,416 INFO L82 PathProgramCache]: Analyzing trace with hash 761543090, now seen corresponding path program 26 times [2021-06-05 22:03:52,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:52,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087587875] [2021-06-05 22:03:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:52,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:52,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087587875] [2021-06-05 22:03:52,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087587875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760416897] [2021-06-05 22:03:52,640 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 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 22:03:52,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:52,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:52,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:03:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:53,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:53,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,795 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:53,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,802 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,814 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,822 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:53,823 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,831 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:53,831 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:53,840 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,849 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:53,850 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,857 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,865 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,872 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,879 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:53,880 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,888 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,895 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:53,897 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,903 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,912 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:53,913 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,919 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,926 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:53,927 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,935 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:53,936 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,942 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,948 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:53,949 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,954 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:53,955 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,961 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:53,962 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,967 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:53,968 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,974 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:53,975 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,980 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:53,981 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:53,986 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,991 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:53,992 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:53,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:53,997 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:53,998 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,003 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:54,003 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,008 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:54,009 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:54,016 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,021 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:54,022 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:54,026 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,032 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:54,033 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:54,037 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,325 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 22:03:54,325 INFO L628 ElimStorePlain]: treesize reduction 97, result has 75.2 percent of original size [2021-06-05 22:03:54,329 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 4 treesize of output 2 [2021-06-05 22:03:54,330 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,334 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 4 treesize of output 2 [2021-06-05 22:03:54,335 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,338 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 3 treesize of output 1 [2021-06-05 22:03:54,339 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,342 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 4 treesize of output 2 [2021-06-05 22:03:54,343 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,347 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 3 treesize of output 1 [2021-06-05 22:03:54,348 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,351 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 4 treesize of output 2 [2021-06-05 22:03:54,352 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,493 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 22:03:54,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:54,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:03:54,497 INFO L247 ElimStorePlain]: Needed 47 recursive calls to eliminate 3 variables, input treesize:1693, output treesize:240 [2021-06-05 22:03:54,699 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 22:03:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:55,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760416897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:55,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:03:55,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76630645] [2021-06-05 22:03:55,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:03:55,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:55,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:03:55,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:55,024 INFO L87 Difference]: Start difference. First operand 629 states and 2122 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:55,159 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 22:03:56,123 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 22:03:56,485 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 22:03:56,701 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 22:03:56,973 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-06-05 22:03:57,191 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-06-05 22:03:57,551 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 22:03:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:57,555 INFO L93 Difference]: Finished difference Result 997 states and 3169 transitions. [2021-06-05 22:03:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:03:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:57,557 INFO L225 Difference]: With dead ends: 997 [2021-06-05 22:03:57,557 INFO L226 Difference]: Without dead ends: 937 [2021-06-05 22:03:57,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2969.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:03:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-06-05 22:03:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 636. [2021-06-05 22:03:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 3.3858267716535435) internal successors, (2150), 635 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 2150 transitions. [2021-06-05 22:03:57,568 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 2150 transitions. Word has length 20 [2021-06-05 22:03:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:57,568 INFO L482 AbstractCegarLoop]: Abstraction has 636 states and 2150 transitions. [2021-06-05 22:03:57,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 2150 transitions. [2021-06-05 22:03:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:57,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:57,569 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:57,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:57,775 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:57,775 INFO L82 PathProgramCache]: Analyzing trace with hash -750476354, now seen corresponding path program 27 times [2021-06-05 22:03:57,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:57,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871263496] [2021-06-05 22:03:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:57,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871263496] [2021-06-05 22:03:57,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871263496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141038293] [2021-06-05 22:03:57,973 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 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 22:03:58,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:58,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:58,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:03:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:59,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,307 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:59,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,317 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:59,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,324 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:59,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,347 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,353 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:59,354 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,361 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:03:59,362 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,367 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,372 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,376 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,381 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:03:59,382 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:03:59,388 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,392 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:03:59,393 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,396 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:03:59,400 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:59,405 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:03:59,406 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:59,412 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,566 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 22:03:59,567 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.4 percent of original size [2021-06-05 22:03:59,571 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 3 treesize of output 1 [2021-06-05 22:03:59,572 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,577 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 5 treesize of output 1 [2021-06-05 22:03:59,579 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,582 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 3 treesize of output 1 [2021-06-05 22:03:59,586 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,590 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 4 treesize of output 2 [2021-06-05 22:03:59,591 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,595 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 4 treesize of output 2 [2021-06-05 22:03:59,597 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:59,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:59,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:03:59,650 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:761, output treesize:89 [2021-06-05 22:03:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:59,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141038293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:59,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:59,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:03:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925861195] [2021-06-05 22:03:59,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:03:59,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:59,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:03:59,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:59,766 INFO L87 Difference]: Start difference. First operand 636 states and 2150 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:59,988 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 22:04:00,189 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 22:04:00,307 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 22:04:00,465 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 22:04:00,706 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-05 22:04:00,875 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 22:04:01,074 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 22:04:01,282 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 22:04:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:01,431 INFO L93 Difference]: Finished difference Result 793 states and 2561 transitions. [2021-06-05 22:04:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:04:01,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:01,433 INFO L225 Difference]: With dead ends: 793 [2021-06-05 22:04:01,433 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 22:04:01,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2014.4ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 22:04:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 645. [2021-06-05 22:04:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.391304347826087) internal successors, (2184), 644 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2184 transitions. [2021-06-05 22:04:01,444 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2184 transitions. Word has length 20 [2021-06-05 22:04:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:01,444 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2184 transitions. [2021-06-05 22:04:01,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2184 transitions. [2021-06-05 22:04:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:01,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:01,446 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:01,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:01,661 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:01,662 INFO L82 PathProgramCache]: Analyzing trace with hash -807827858, now seen corresponding path program 28 times [2021-06-05 22:04:01,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:01,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942275576] [2021-06-05 22:04:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:01,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:01,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942275576] [2021-06-05 22:04:01,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942275576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852679790] [2021-06-05 22:04:01,856 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 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 22:04:01,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:04:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:02,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,880 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:02,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,898 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,903 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,907 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:02,908 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,913 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:02,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,918 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:02,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,924 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:02,924 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,930 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:02,931 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,935 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:02,942 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,946 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,950 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:02,951 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,954 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,958 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:02,959 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,963 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:02,964 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:02,967 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:03,089 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 22:04:03,090 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.4 percent of original size [2021-06-05 22:04:03,092 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 4 treesize of output 2 [2021-06-05 22:04:03,093 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:03,096 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 3 treesize of output 1 [2021-06-05 22:04:03,097 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:03,099 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 5 treesize of output 1 [2021-06-05 22:04:03,100 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:03,102 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 3 treesize of output 1 [2021-06-05 22:04:03,103 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:03,106 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 4 treesize of output 2 [2021-06-05 22:04:03,106 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:03,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:03,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:04:03,155 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:761, output treesize:89 [2021-06-05 22:04:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:03,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852679790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:03,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:03,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:03,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136753510] [2021-06-05 22:04:03,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:03,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:03,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:03,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:03,272 INFO L87 Difference]: Start difference. First operand 645 states and 2184 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,570 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 22:04:03,731 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 22:04:03,845 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 22:04:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:03,980 INFO L93 Difference]: Finished difference Result 815 states and 2658 transitions. [2021-06-05 22:04:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:04:03,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:03,982 INFO L225 Difference]: With dead ends: 815 [2021-06-05 22:04:03,982 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 22:04:03,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1012.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 22:04:03,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 648. [2021-06-05 22:04:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.3879443585780527) internal successors, (2192), 647 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2192 transitions. [2021-06-05 22:04:03,991 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2192 transitions. Word has length 20 [2021-06-05 22:04:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:03,991 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 2192 transitions. [2021-06-05 22:04:03,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2192 transitions. [2021-06-05 22:04:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:03,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:03,992 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:04,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-06-05 22:04:04,193 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1783372094, now seen corresponding path program 29 times [2021-06-05 22:04:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:04,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901141595] [2021-06-05 22:04:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:04,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:04,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901141595] [2021-06-05 22:04:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901141595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116293402] [2021-06-05 22:04:04,375 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 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 22:04:04,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:04:04,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:04,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116293402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:04,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:04,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:04:04,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634955558] [2021-06-05 22:04:04,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:04:04,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:04:04,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:04,910 INFO L87 Difference]: Start difference. First operand 648 states and 2192 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:04:05,568 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 22:04:05,839 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 22:04:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:05,876 INFO L93 Difference]: Finished difference Result 861 states and 2756 transitions. [2021-06-05 22:04:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:05,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:04:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:05,877 INFO L225 Difference]: With dead ends: 861 [2021-06-05 22:04:05,877 INFO L226 Difference]: Without dead ends: 846 [2021-06-05 22:04:05,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1179.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-05 22:04:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 637. [2021-06-05 22:04:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.3789308176100628) internal successors, (2149), 636 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2149 transitions. [2021-06-05 22:04:05,885 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2149 transitions. Word has length 20 [2021-06-05 22:04:05,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:05,885 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2149 transitions. [2021-06-05 22:04:05,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:04:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2149 transitions. [2021-06-05 22:04:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:05,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:05,886 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:06,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1822,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:06,087 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:06,087 INFO L82 PathProgramCache]: Analyzing trace with hash 889417086, now seen corresponding path program 30 times [2021-06-05 22:04:06,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:06,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213075260] [2021-06-05 22:04:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:06,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:06,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213075260] [2021-06-05 22:04:06,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213075260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:06,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462838469] [2021-06-05 22:04:06,327 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 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 22:04:06,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:06,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:06,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:04:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:07,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,194 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:07,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,199 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:07,200 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,204 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:07,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,209 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,213 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:07,213 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,217 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,221 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,225 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:07,226 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,230 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:07,230 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,234 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,240 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:07,241 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,247 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:07,247 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,253 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:07,254 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,259 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:07,260 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:07,263 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,381 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 22:04:07,381 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.4 percent of original size [2021-06-05 22:04:07,384 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 4 treesize of output 2 [2021-06-05 22:04:07,385 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,388 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 3 treesize of output 1 [2021-06-05 22:04:07,389 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,391 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 5 treesize of output 1 [2021-06-05 22:04:07,392 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,395 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 4 treesize of output 2 [2021-06-05 22:04:07,396 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,398 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 3 treesize of output 1 [2021-06-05 22:04:07,399 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:07,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:04:07,456 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:761, output treesize:89 [2021-06-05 22:04:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:07,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462838469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:07,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:07,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:07,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067318518] [2021-06-05 22:04:07,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:07,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:07,575 INFO L87 Difference]: Start difference. First operand 637 states and 2149 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:08,070 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 22:04:08,439 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 22:04:08,600 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-06-05 22:04:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:08,839 INFO L93 Difference]: Finished difference Result 854 states and 2751 transitions. [2021-06-05 22:04:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:04:08,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:08,840 INFO L225 Difference]: With dead ends: 854 [2021-06-05 22:04:08,840 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 22:04:08,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1470.7ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:04:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 22:04:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 637. [2021-06-05 22:04:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.3789308176100628) internal successors, (2149), 636 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2149 transitions. [2021-06-05 22:04:08,848 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2149 transitions. Word has length 20 [2021-06-05 22:04:08,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:08,848 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2149 transitions. [2021-06-05 22:04:08,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2149 transitions. [2021-06-05 22:04:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:08,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:08,849 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:09,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-06-05 22:04:09,049 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash 48224212, now seen corresponding path program 31 times [2021-06-05 22:04:09,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:09,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524381047] [2021-06-05 22:04:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:09,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524381047] [2021-06-05 22:04:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524381047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410190497] [2021-06-05 22:04:09,305 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 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 22:04:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:09,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:04:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:09,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,849 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:09,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,854 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:09,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:09,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,866 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:09,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,871 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:09,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,876 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:09,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,882 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:09,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,888 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:09,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,893 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:09,894 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,901 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:09,902 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:09,908 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,913 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:09,914 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,920 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:09,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,926 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:09,927 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,931 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:09,932 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,937 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:09,937 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,942 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:09,947 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,952 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:09,953 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,957 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:09,958 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,961 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:09,962 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:10,097 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 22:04:10,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:10,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:04:10,102 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:785, output treesize:308 [2021-06-05 22:04:10,345 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 22:04:11,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:11,432 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:11,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:11,630 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 68 [2021-06-05 22:04:11,630 INFO L628 ElimStorePlain]: treesize reduction 223, result has 44.7 percent of original size [2021-06-05 22:04:11,631 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-06-05 22:04:11,631 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-06-05 22:04:11,631 INFO L518 ElimStorePlain]: Eliminatee v_prenex_39 vanished before elimination [2021-06-05 22:04:11,631 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-06-05 22:04:11,634 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 4 treesize of output 2 [2021-06-05 22:04:11,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:11,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:11,718 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 3 treesize of output 1 [2021-06-05 22:04:11,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:11,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:11,798 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 3 treesize of output 1 [2021-06-05 22:04:11,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:11,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:11,876 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 6 treesize of output 2 [2021-06-05 22:04:11,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:11,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:11,967 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 6 treesize of output 2 [2021-06-05 22:04:11,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:12,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:12,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:04:12,042 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 15 variables, input treesize:411, output treesize:134 [2021-06-05 22:04:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:12,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410190497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:12,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:12,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:12,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931431440] [2021-06-05 22:04:12,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:12,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:12,247 INFO L87 Difference]: Start difference. First operand 637 states and 2149 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:12,834 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 22:04:12,955 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 22:04:13,254 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2021-06-05 22:04:13,622 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2021-06-05 22:04:13,739 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 22:04:14,019 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2021-06-05 22:04:14,445 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-06-05 22:04:14,786 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-05 22:04:15,286 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2021-06-05 22:04:15,610 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-06-05 22:04:15,914 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-06-05 22:04:16,217 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-06-05 22:04:16,549 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 89 [2021-06-05 22:04:16,959 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-06-05 22:04:17,295 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2021-06-05 22:04:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:17,319 INFO L93 Difference]: Finished difference Result 1166 states and 3608 transitions. [2021-06-05 22:04:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:04:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:17,327 INFO L225 Difference]: With dead ends: 1166 [2021-06-05 22:04:17,327 INFO L226 Difference]: Without dead ends: 1091 [2021-06-05 22:04:17,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 5412.9ms TimeCoverageRelationStatistics Valid=325, Invalid=1235, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:04:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-06-05 22:04:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 664. [2021-06-05 22:04:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.396681749622926) internal successors, (2252), 663 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2252 transitions. [2021-06-05 22:04:17,336 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2252 transitions. Word has length 20 [2021-06-05 22:04:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:17,336 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 2252 transitions. [2021-06-05 22:04:17,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2252 transitions. [2021-06-05 22:04:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:17,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:17,337 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:17,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:17,538 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1926175282, now seen corresponding path program 32 times [2021-06-05 22:04:17,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:17,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994933642] [2021-06-05 22:04:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:17,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994933642] [2021-06-05 22:04:17,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994933642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:17,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098888006] [2021-06-05 22:04:17,748 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 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 22:04:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:04:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:18,286 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_46, v_prenex_47, ends_with_2, v_prenex_45, v_prenex_48, v_prenex_49], 6=[v_prenex_50, v_prenex_53, v_prenex_51]} [2021-06-05 22:04:18,295 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 5 treesize of output 1 [2021-06-05 22:04:18,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:18,959 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 133 [2021-06-05 22:04:18,959 INFO L628 ElimStorePlain]: treesize reduction 428, result has 61.9 percent of original size [2021-06-05 22:04:18,965 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 6 treesize of output 2 [2021-06-05 22:04:18,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:19,240 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 22:04:19,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:19,247 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 6 treesize of output 2 [2021-06-05 22:04:19,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:19,521 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 22:04:19,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:19,527 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 4 treesize of output 2 [2021-06-05 22:04:19,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:19,808 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 22:04:19,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:19,814 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 6 treesize of output 2 [2021-06-05 22:04:19,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,336 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 120 [2021-06-05 22:04:20,337 INFO L628 ElimStorePlain]: treesize reduction 42, result has 93.8 percent of original size [2021-06-05 22:04:20,341 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 3 treesize of output 1 [2021-06-05 22:04:20,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,598 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 22:04:20,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:20,604 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 6 treesize of output 2 [2021-06-05 22:04:20,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,610 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 6 treesize of output 2 [2021-06-05 22:04:20,611 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,616 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 6 treesize of output 2 [2021-06-05 22:04:20,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,622 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 6 treesize of output 2 [2021-06-05 22:04:20,622 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,868 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 22:04:20,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:20,873 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 6 treesize of output 2 [2021-06-05 22:04:20,874 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,879 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 6 treesize of output 2 [2021-06-05 22:04:20,880 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,885 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 4 treesize of output 2 [2021-06-05 22:04:20,886 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,890 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 6 treesize of output 2 [2021-06-05 22:04:20,891 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:21,132 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:04:21,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:21,138 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 5 treesize of output 1 [2021-06-05 22:04:21,139 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:21,143 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 3 treesize of output 1 [2021-06-05 22:04:21,144 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:21,383 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:04:21,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:21,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 9 dim-1 vars, End of recursive call: 11 dim-0 vars, and 15 xjuncts. [2021-06-05 22:04:21,397 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:1127, output treesize:573 [2021-06-05 22:04:21,722 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 121 [2021-06-05 22:04:21,936 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 22:04:23,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:23,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:23,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,207 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:23,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,216 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:23,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:23,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,726 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 131 [2021-06-05 22:04:23,726 INFO L628 ElimStorePlain]: treesize reduction 1199, result has 23.7 percent of original size [2021-06-05 22:04:23,743 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 3 treesize of output 1 [2021-06-05 22:04:23,745 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,902 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:04:23,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:23,908 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 4 treesize of output 2 [2021-06-05 22:04:23,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,062 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:04:24,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,068 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 5 treesize of output 1 [2021-06-05 22:04:24,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,218 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 22:04:24,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,225 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 4 treesize of output 2 [2021-06-05 22:04:24,226 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,374 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 22:04:24,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,380 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 4 treesize of output 2 [2021-06-05 22:04:24,381 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,531 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 22:04:24,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,538 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 5 treesize of output 1 [2021-06-05 22:04:24,538 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,552 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 5 treesize of output 1 [2021-06-05 22:04:24,553 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,709 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 22:04:24,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,715 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 3 treesize of output 1 [2021-06-05 22:04:24,715 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,860 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 22:04:24,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,876 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 4 treesize of output 2 [2021-06-05 22:04:24,878 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:25,025 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 22:04:25,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:25,032 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 3 treesize of output 1 [2021-06-05 22:04:25,033 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:25,174 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:04:25,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:25,179 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 6 treesize of output 2 [2021-06-05 22:04:25,180 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:25,319 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:04:25,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:25,324 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 3 treesize of output 1 [2021-06-05 22:04:25,325 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:25,462 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:04:25,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:25,467 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 4 treesize of output 2 [2021-06-05 22:04:25,468 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:25,601 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 22:04:25,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:25,606 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 4 treesize of output 2 [2021-06-05 22:04:25,607 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:25,738 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 22:04:25,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:25,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 22:04:25,748 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 22 variables, input treesize:1788, output treesize:249 [2021-06-05 22:04:25,958 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 22:04:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:26,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098888006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:26,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:26,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:26,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143896602] [2021-06-05 22:04:26,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:26,263 INFO L87 Difference]: Start difference. First operand 664 states and 2252 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:26,580 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2021-06-05 22:04:26,892 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2021-06-05 22:04:27,273 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2021-06-05 22:04:27,856 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 139 [2021-06-05 22:04:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:27,903 INFO L93 Difference]: Finished difference Result 912 states and 2903 transitions. [2021-06-05 22:04:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:27,905 INFO L225 Difference]: With dead ends: 912 [2021-06-05 22:04:27,905 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 22:04:27,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2361.8ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 22:04:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 666. [2021-06-05 22:04:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.38796992481203) internal successors, (2253), 665 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2253 transitions. [2021-06-05 22:04:27,913 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2253 transitions. Word has length 20 [2021-06-05 22:04:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:27,913 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2253 transitions. [2021-06-05 22:04:27,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2253 transitions. [2021-06-05 22:04:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:27,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:27,914 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:28,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2326 [2021-06-05 22:04:28,114 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1839884244, now seen corresponding path program 33 times [2021-06-05 22:04:28,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:28,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114522902] [2021-06-05 22:04:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:28,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:28,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114522902] [2021-06-05 22:04:28,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114522902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:28,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438542142] [2021-06-05 22:04:28,300 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 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 22:04:28,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:28,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:04:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,587 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:28,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,593 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:28,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,598 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:28,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,603 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:28,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,609 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 5 treesize of output 1 [2021-06-05 22:04:28,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,614 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:28,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,619 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:28,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,623 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 3 treesize of output 1 [2021-06-05 22:04:28,624 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:28,628 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:28,632 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,636 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:28,637 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,641 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:28,642 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,646 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:28,646 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,651 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:28,653 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,657 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:28,657 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:28,661 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:28,661 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:28,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:28,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:04:28,762 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:565, output treesize:225 [2021-06-05 22:04:28,968 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-06-05 22:04:29,110 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:04:29,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,567 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:29,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:29,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,708 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-06-05 22:04:29,708 INFO L628 ElimStorePlain]: treesize reduction 85, result has 65.2 percent of original size [2021-06-05 22:04:29,711 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 5 treesize of output 1 [2021-06-05 22:04:29,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,820 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-05 22:04:29,821 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.1 percent of original size [2021-06-05 22:04:29,837 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 5 treesize of output 1 [2021-06-05 22:04:29,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:29,906 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 4 treesize of output 2 [2021-06-05 22:04:29,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:29,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:04:29,965 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:287, output treesize:119 [2021-06-05 22:04:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:30,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438542142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:30,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:30,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:30,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179632977] [2021-06-05 22:04:30,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:30,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:30,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:30,201 INFO L87 Difference]: Start difference. First operand 666 states and 2253 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:30,683 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 22:04:31,055 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2021-06-05 22:04:31,374 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-06-05 22:04:31,677 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 22:04:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:31,728 INFO L93 Difference]: Finished difference Result 879 states and 2825 transitions. [2021-06-05 22:04:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:31,729 INFO L225 Difference]: With dead ends: 879 [2021-06-05 22:04:31,729 INFO L226 Difference]: Without dead ends: 864 [2021-06-05 22:04:31,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1974.3ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-06-05 22:04:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 673. [2021-06-05 22:04:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.3898809523809526) internal successors, (2278), 672 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2278 transitions. [2021-06-05 22:04:31,738 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2278 transitions. Word has length 20 [2021-06-05 22:04:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:31,738 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2278 transitions. [2021-06-05 22:04:31,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2278 transitions. [2021-06-05 22:04:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:31,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:31,739 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:31,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2801 [2021-06-05 22:04:31,940 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1540001564, now seen corresponding path program 34 times [2021-06-05 22:04:31,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:31,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599166358] [2021-06-05 22:04:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:32,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599166358] [2021-06-05 22:04:32,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599166358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194820791] [2021-06-05 22:04:32,136 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 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 22:04:32,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:04:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:32,550 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_83, v_prenex_85], 15=[ends_with_2]} [2021-06-05 22:04:32,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,557 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:32,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:32,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,565 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:32,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,571 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:32,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:32,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,578 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:32,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:32,947 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 99 [2021-06-05 22:04:32,948 INFO L628 ElimStorePlain]: treesize reduction 332, result has 51.2 percent of original size [2021-06-05 22:04:32,954 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 5 treesize of output 1 [2021-06-05 22:04:32,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:32,972 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 5 treesize of output 1 [2021-06-05 22:04:32,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,126 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 22:04:33,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:33,131 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 4 treesize of output 2 [2021-06-05 22:04:33,132 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,137 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 4 treesize of output 2 [2021-06-05 22:04:33,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,142 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 4 treesize of output 2 [2021-06-05 22:04:33,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,147 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 6 treesize of output 2 [2021-06-05 22:04:33,148 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,293 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:04:33,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:33,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-06-05 22:04:33,304 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:789, output treesize:321 [2021-06-05 22:04:33,463 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 22:04:33,816 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:04:34,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:34,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:34,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:34,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:34,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:34,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:34,666 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:04:34,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:34,674 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:34,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,011 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2021-06-05 22:04:35,012 INFO L628 ElimStorePlain]: treesize reduction 783, result has 23.6 percent of original size [2021-06-05 22:04:35,017 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 5 treesize of output 1 [2021-06-05 22:04:35,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,125 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 22:04:35,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,130 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 4 treesize of output 2 [2021-06-05 22:04:35,131 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,237 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 22:04:35,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,242 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 3 treesize of output 1 [2021-06-05 22:04:35,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,347 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:04:35,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,352 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 6 treesize of output 2 [2021-06-05 22:04:35,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,455 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 22:04:35,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,460 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 4 treesize of output 2 [2021-06-05 22:04:35,461 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,562 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 22:04:35,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,567 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 3 treesize of output 1 [2021-06-05 22:04:35,567 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,672 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 6 treesize of output 2 [2021-06-05 22:04:35,673 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,774 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 4 treesize of output 2 [2021-06-05 22:04:35,775 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,874 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 3 treesize of output 1 [2021-06-05 22:04:35,875 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,972 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 3 treesize of output 1 [2021-06-05 22:04:35,973 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:36,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:36,068 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 3 treesize of output 1 [2021-06-05 22:04:36,069 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:36,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:36,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:04:36,161 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 17 variables, input treesize:1169, output treesize:156 [2021-06-05 22:04:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:36,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194820791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:36,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:36,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671578943] [2021-06-05 22:04:36,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:36,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:36,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:36,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:36,465 INFO L87 Difference]: Start difference. First operand 673 states and 2278 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:36,915 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 103 [2021-06-05 22:04:37,297 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-06-05 22:04:37,803 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 120 [2021-06-05 22:04:38,194 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 94 [2021-06-05 22:04:38,513 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 114 [2021-06-05 22:04:38,804 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 91 [2021-06-05 22:04:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:38,833 INFO L93 Difference]: Finished difference Result 980 states and 3094 transitions. [2021-06-05 22:04:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:04:38,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:38,834 INFO L225 Difference]: With dead ends: 980 [2021-06-05 22:04:38,834 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 22:04:38,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2776.3ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 22:04:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 673. [2021-06-05 22:04:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.3898809523809526) internal successors, (2278), 672 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2278 transitions. [2021-06-05 22:04:38,843 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2278 transitions. Word has length 20 [2021-06-05 22:04:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:38,843 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2278 transitions. [2021-06-05 22:04:38,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2278 transitions. [2021-06-05 22:04:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:38,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:38,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:39,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:39,045 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:39,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 35 times [2021-06-05 22:04:39,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:39,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869210732] [2021-06-05 22:04:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:39,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869210732] [2021-06-05 22:04:39,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869210732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088173925] [2021-06-05 22:04:39,386 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 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 22:04:39,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:04:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088173925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:04:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460187697] [2021-06-05 22:04:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:04:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:04:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:39,895 INFO L87 Difference]: Start difference. First operand 673 states and 2278 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:04:40,435 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2021-06-05 22:04:40,869 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 22:04:41,032 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-05 22:04:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:41,344 INFO L93 Difference]: Finished difference Result 898 states and 2884 transitions. [2021-06-05 22:04:41,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:04:41,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:04:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:41,346 INFO L225 Difference]: With dead ends: 898 [2021-06-05 22:04:41,346 INFO L226 Difference]: Without dead ends: 853 [2021-06-05 22:04:41,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1701.0ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:04:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-06-05 22:04:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 676. [2021-06-05 22:04:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.388148148148148) internal successors, (2287), 675 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2287 transitions. [2021-06-05 22:04:41,355 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2287 transitions. Word has length 20 [2021-06-05 22:04:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:41,355 INFO L482 AbstractCegarLoop]: Abstraction has 676 states and 2287 transitions. [2021-06-05 22:04:41,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:04:41,355 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2287 transitions. [2021-06-05 22:04:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:41,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:41,356 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:41,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:41,557 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 36 times [2021-06-05 22:04:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:41,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211822950] [2021-06-05 22:04:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:41,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:41,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211822950] [2021-06-05 22:04:41,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211822950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:41,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102229277] [2021-06-05 22:04:41,748 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:41,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:41,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:04:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:42,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:42,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:42,474 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:42,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:42,479 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 3 treesize of output 1 [2021-06-05 22:04:42,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:42,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:42,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:42,486 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:42,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:42,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:42,491 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:42,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:42,781 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 22:04:42,782 INFO L628 ElimStorePlain]: treesize reduction 172, result has 62.9 percent of original size [2021-06-05 22:04:42,785 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 6 treesize of output 2 [2021-06-05 22:04:42,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:42,790 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 6 treesize of output 2 [2021-06-05 22:04:42,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:42,910 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 22:04:42,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:42,915 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 4 treesize of output 2 [2021-06-05 22:04:42,916 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:42,920 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 4 treesize of output 2 [2021-06-05 22:04:42,921 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:43,037 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 22:04:43,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:43,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 9 xjuncts. [2021-06-05 22:04:43,041 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:551, output treesize:272 [2021-06-05 22:04:43,253 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 22:04:44,375 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_111, v_prenex_121, v_prenex_115, ends_with_6], 10=[v_prenex_110, ends_with_2, v_prenex_114, v_prenex_120]} [2021-06-05 22:04:44,383 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 5 treesize of output 1 [2021-06-05 22:04:44,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,392 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 5 treesize of output 1 [2021-06-05 22:04:44,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:44,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,409 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:44,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,417 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 5 treesize of output 1 [2021-06-05 22:04:44,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,426 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:44,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,435 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:44,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,883 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 104 [2021-06-05 22:04:44,883 INFO L628 ElimStorePlain]: treesize reduction 580, result has 43.1 percent of original size [2021-06-05 22:04:44,888 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 6 treesize of output 2 [2021-06-05 22:04:44,889 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,894 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 6 treesize of output 2 [2021-06-05 22:04:44,894 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,080 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 22:04:45,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:45,085 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 3 treesize of output 1 [2021-06-05 22:04:45,087 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,091 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 3 treesize of output 1 [2021-06-05 22:04:45,092 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,274 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:04:45,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:45,279 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 4 treesize of output 2 [2021-06-05 22:04:45,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,285 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 4 treesize of output 2 [2021-06-05 22:04:45,286 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,290 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 4 treesize of output 2 [2021-06-05 22:04:45,291 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,296 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 4 treesize of output 2 [2021-06-05 22:04:45,297 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,302 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 4 treesize of output 2 [2021-06-05 22:04:45,303 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,477 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 22:04:45,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:45,482 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 6 treesize of output 2 [2021-06-05 22:04:45,483 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,488 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 6 treesize of output 2 [2021-06-05 22:04:45,490 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,494 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 6 treesize of output 2 [2021-06-05 22:04:45,495 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,663 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 22:04:45,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:45,668 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 4 treesize of output 2 [2021-06-05 22:04:45,669 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,673 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 6 treesize of output 2 [2021-06-05 22:04:45,674 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,679 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 4 treesize of output 2 [2021-06-05 22:04:45,680 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,684 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 4 treesize of output 2 [2021-06-05 22:04:45,685 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,689 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 4 treesize of output 2 [2021-06-05 22:04:45,690 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:46,010 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 22:04:46,011 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 22:04:46,015 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 3 treesize of output 1 [2021-06-05 22:04:46,016 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:46,020 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 3 treesize of output 1 [2021-06-05 22:04:46,021 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:46,171 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 22:04:46,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:46,176 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 5 treesize of output 1 [2021-06-05 22:04:46,177 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:46,180 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 5 treesize of output 1 [2021-06-05 22:04:46,181 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:46,328 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 22:04:46,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:46,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 8 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 22:04:46,334 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 21 variables, input treesize:1207, output treesize:266 [2021-06-05 22:04:46,495 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-05 22:04:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:46,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102229277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:46,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:46,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:46,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080599385] [2021-06-05 22:04:46,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:46,673 INFO L87 Difference]: Start difference. First operand 676 states and 2287 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:47,011 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 22:04:47,160 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 22:04:47,437 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-06-05 22:04:47,658 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-06-05 22:04:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:47,680 INFO L93 Difference]: Finished difference Result 761 states and 2533 transitions. [2021-06-05 22:04:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:47,682 INFO L225 Difference]: With dead ends: 761 [2021-06-05 22:04:47,682 INFO L226 Difference]: Without dead ends: 746 [2021-06-05 22:04:47,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1744.1ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-06-05 22:04:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 685. [2021-06-05 22:04:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.3830409356725144) internal successors, (2314), 684 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2314 transitions. [2021-06-05 22:04:47,689 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2314 transitions. Word has length 20 [2021-06-05 22:04:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:47,690 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2314 transitions. [2021-06-05 22:04:47,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2314 transitions. [2021-06-05 22:04:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:47,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:47,691 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:47,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:47,891 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash 725260138, now seen corresponding path program 37 times [2021-06-05 22:04:47,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:47,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116018543] [2021-06-05 22:04:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:48,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:48,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116018543] [2021-06-05 22:04:48,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116018543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:48,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251699307] [2021-06-05 22:04:48,175 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 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 22:04:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:48,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:04:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,883 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:48,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:48,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,891 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:48,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:48,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,906 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:48,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,913 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:48,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:49,450 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 103 [2021-06-05 22:04:49,451 INFO L628 ElimStorePlain]: treesize reduction 474, result has 50.6 percent of original size [2021-06-05 22:04:49,456 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 6 treesize of output 2 [2021-06-05 22:04:49,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:49,462 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 4 treesize of output 2 [2021-06-05 22:04:49,463 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:49,470 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 6 treesize of output 2 [2021-06-05 22:04:49,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:49,696 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:04:49,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:49,702 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 5 treesize of output 1 [2021-06-05 22:04:49,702 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:49,713 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 5 treesize of output 1 [2021-06-05 22:04:49,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:49,935 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 22:04:49,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:49,940 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 3 treesize of output 1 [2021-06-05 22:04:49,941 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:49,945 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 5 treesize of output 1 [2021-06-05 22:04:49,946 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:50,158 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 22:04:50,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:50,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:04:50,170 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:1095, output treesize:451 [2021-06-05 22:04:50,522 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 129 [2021-06-05 22:04:50,906 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 89 [2021-06-05 22:04:52,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:52,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:52,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:52,044 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:04:52,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:52,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,392 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 97 [2021-06-05 22:04:52,392 INFO L628 ElimStorePlain]: treesize reduction 823, result has 22.5 percent of original size [2021-06-05 22:04:52,397 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 3 treesize of output 1 [2021-06-05 22:04:52,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,504 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 22:04:52,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:52,505 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-06-05 22:04:52,505 INFO L518 ElimStorePlain]: Eliminatee v_prenex_165 vanished before elimination [2021-06-05 22:04:52,510 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 5 treesize of output 1 [2021-06-05 22:04:52,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,614 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:04:52,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:52,615 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-06-05 22:04:52,615 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-05 22:04:52,620 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 3 treesize of output 1 [2021-06-05 22:04:52,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,722 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 22:04:52,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:52,727 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 5 treesize of output 1 [2021-06-05 22:04:52,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,828 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 22:04:52,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:52,833 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 4 treesize of output 2 [2021-06-05 22:04:52,834 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:52,932 INFO L518 ElimStorePlain]: Eliminatee v_prenex_148 vanished before elimination [2021-06-05 22:04:52,933 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-06-05 22:04:52,933 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-06-05 22:04:52,933 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-05 22:04:52,937 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 4 treesize of output 2 [2021-06-05 22:04:52,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,042 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 22:04:53,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:53,043 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-05 22:04:53,043 INFO L518 ElimStorePlain]: Eliminatee v_prenex_140 vanished before elimination [2021-06-05 22:04:53,047 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 3 treesize of output 1 [2021-06-05 22:04:53,048 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:53,142 INFO L518 ElimStorePlain]: Eliminatee v_prenex_150 vanished before elimination [2021-06-05 22:04:53,147 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 6 treesize of output 2 [2021-06-05 22:04:53,148 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:53,240 INFO L518 ElimStorePlain]: Eliminatee v_prenex_164 vanished before elimination [2021-06-05 22:04:53,244 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 3 treesize of output 1 [2021-06-05 22:04:53,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:53,340 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 4 treesize of output 2 [2021-06-05 22:04:53,341 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:53,435 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 3 treesize of output 1 [2021-06-05 22:04:53,436 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:53,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 24 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:04:53,528 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 34 variables, input treesize:1169, output treesize:163 [2021-06-05 22:04:53,689 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:04:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251699307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:53,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:53,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:04:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998017237] [2021-06-05 22:04:53,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:04:53,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:53,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:04:53,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:53,836 INFO L87 Difference]: Start difference. First operand 685 states and 2314 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:54,217 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-06-05 22:04:54,413 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 22:04:54,799 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 130 [2021-06-05 22:04:55,201 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 22:04:55,417 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 22:04:55,593 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-05 22:04:55,761 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 22:04:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:55,774 INFO L93 Difference]: Finished difference Result 877 states and 2851 transitions. [2021-06-05 22:04:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:04:55,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:55,775 INFO L225 Difference]: With dead ends: 877 [2021-06-05 22:04:55,775 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 22:04:55,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2757.2ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:04:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 22:04:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 686. [2021-06-05 22:04:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3854014598540147) internal successors, (2319), 685 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2319 transitions. [2021-06-05 22:04:55,783 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2319 transitions. Word has length 20 [2021-06-05 22:04:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:55,783 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2319 transitions. [2021-06-05 22:04:55,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2319 transitions. [2021-06-05 22:04:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:55,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:55,785 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:56,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:56,007 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1910342118, now seen corresponding path program 38 times [2021-06-05 22:04:56,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:56,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511081212] [2021-06-05 22:04:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:56,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:56,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511081212] [2021-06-05 22:04:56,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511081212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:56,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388310663] [2021-06-05 22:04:56,256 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 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 22:04:56,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:04:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:56,913 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_2, v_prenex_169], 10=[v_prenex_172]} [2021-06-05 22:04:56,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,921 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:04:56,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:56,928 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 3 treesize of output 1 [2021-06-05 22:04:56,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:56,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,936 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:04:56,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:56,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,943 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:04:56,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,397 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 110 [2021-06-05 22:04:57,398 INFO L628 ElimStorePlain]: treesize reduction 237, result has 66.3 percent of original size [2021-06-05 22:04:57,403 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 5 treesize of output 1 [2021-06-05 22:04:57,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,409 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 3 treesize of output 1 [2021-06-05 22:04:57,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,622 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:04:57,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:57,628 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 6 treesize of output 2 [2021-06-05 22:04:57,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,635 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 6 treesize of output 2 [2021-06-05 22:04:57,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,641 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 6 treesize of output 2 [2021-06-05 22:04:57,642 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,646 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 4 treesize of output 2 [2021-06-05 22:04:57,647 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,652 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 4 treesize of output 2 [2021-06-05 22:04:57,653 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,658 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 4 treesize of output 2 [2021-06-05 22:04:57,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:57,865 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:04:57,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:57,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:04:57,877 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:809, output treesize:429 [2021-06-05 22:04:58,196 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 125 [2021-06-05 22:04:59,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:59,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:59,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:59,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:59,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:59,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:59,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,763 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:04:59,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:59,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:04:59,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,347 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 133 [2021-06-05 22:05:00,347 INFO L628 ElimStorePlain]: treesize reduction 1538, result has 19.6 percent of original size [2021-06-05 22:05:00,353 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 3 treesize of output 1 [2021-06-05 22:05:00,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,516 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 22:05:00,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:00,516 INFO L518 ElimStorePlain]: Eliminatee v_prenex_187 vanished before elimination [2021-06-05 22:05:00,516 INFO L518 ElimStorePlain]: Eliminatee v_prenex_201 vanished before elimination [2021-06-05 22:05:00,522 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 6 treesize of output 2 [2021-06-05 22:05:00,523 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,687 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 22:05:00,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:00,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_203 vanished before elimination [2021-06-05 22:05:00,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-06-05 22:05:00,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_205 vanished before elimination [2021-06-05 22:05:00,693 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 5 treesize of output 1 [2021-06-05 22:05:00,694 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,852 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:05:00,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:00,858 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 4 treesize of output 2 [2021-06-05 22:05:00,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:01,014 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 22:05:01,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:01,021 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 4 treesize of output 2 [2021-06-05 22:05:01,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:01,175 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 22:05:01,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:01,181 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 6 treesize of output 2 [2021-06-05 22:05:01,182 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:01,333 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 22:05:01,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:01,339 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 3 treesize of output 1 [2021-06-05 22:05:01,340 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:01,489 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 22:05:01,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:01,489 INFO L518 ElimStorePlain]: Eliminatee v_prenex_186 vanished before elimination [2021-06-05 22:05:01,495 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 3 treesize of output 1 [2021-06-05 22:05:01,496 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:01,646 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 22:05:01,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:01,646 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:05:01,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-06-05 22:05:01,655 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 6 treesize of output 2 [2021-06-05 22:05:01,657 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:01,806 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 22:05:01,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:01,820 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 6 treesize of output 2 [2021-06-05 22:05:01,822 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:01,967 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:05:01,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:01,972 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 3 treesize of output 1 [2021-06-05 22:05:01,973 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,123 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:05:02,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:02,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-06-05 22:05:02,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-06-05 22:05:02,129 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 3 treesize of output 1 [2021-06-05 22:05:02,130 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,268 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 22:05:02,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:02,274 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 4 treesize of output 2 [2021-06-05 22:05:02,275 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,408 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 22:05:02,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:02,409 INFO L518 ElimStorePlain]: Eliminatee v_prenex_192 vanished before elimination [2021-06-05 22:05:02,413 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 5 treesize of output 1 [2021-06-05 22:05:02,414 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,547 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 22:05:02,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:02,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-06-05 22:05:02,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-05 22:05:02,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 28 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 22:05:02,553 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 44 variables, input treesize:2125, output treesize:249 [2021-06-05 22:05:02,737 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 22:05:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:03,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388310663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:03,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:05:03,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425664925] [2021-06-05 22:05:03,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:05:03,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:03,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:05:03,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:03,025 INFO L87 Difference]: Start difference. First operand 686 states and 2319 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:03,473 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2021-06-05 22:05:03,729 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2021-06-05 22:05:04,029 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-06-05 22:05:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:04,065 INFO L93 Difference]: Finished difference Result 825 states and 2715 transitions. [2021-06-05 22:05:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:04,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:04,067 INFO L225 Difference]: With dead ends: 825 [2021-06-05 22:05:04,067 INFO L226 Difference]: Without dead ends: 810 [2021-06-05 22:05:04,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1768.3ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-06-05 22:05:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 685. [2021-06-05 22:05:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.3830409356725144) internal successors, (2314), 684 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2314 transitions. [2021-06-05 22:05:04,075 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2314 transitions. Word has length 20 [2021-06-05 22:05:04,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:04,075 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2314 transitions. [2021-06-05 22:05:04,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2314 transitions. [2021-06-05 22:05:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:04,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:04,076 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:04,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3874,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:04,277 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1980452154, now seen corresponding path program 39 times [2021-06-05 22:05:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:04,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147515025] [2021-06-05 22:05:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:04,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:04,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147515025] [2021-06-05 22:05:04,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147515025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:04,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947820717] [2021-06-05 22:05:04,621 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 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 22:05:04,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:04,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:04,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:05:04,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:05,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,721 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:05:05,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,742 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 5 treesize of output 1 [2021-06-05 22:05:05,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,750 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:05,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,757 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 3 treesize of output 1 [2021-06-05 22:05:05,758 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,765 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:05,766 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,772 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 6 treesize of output 2 [2021-06-05 22:05:05,773 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,780 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:05,781 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,788 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:05,789 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,796 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,802 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 6 treesize of output 2 [2021-06-05 22:05:05,803 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,810 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,817 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,823 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,830 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,837 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:05,837 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,843 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,848 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,852 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,857 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 5 treesize of output 1 [2021-06-05 22:05:05,858 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,863 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:05,864 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,869 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,873 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 5 treesize of output 1 [2021-06-05 22:05:05,874 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,878 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,883 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:05,884 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,889 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,893 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:05,899 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,904 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:05,905 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:05,910 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,914 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,918 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:05,922 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,153 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 22:05:06,153 INFO L628 ElimStorePlain]: treesize reduction 165, result has 59.4 percent of original size [2021-06-05 22:05:06,157 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 5 treesize of output 1 [2021-06-05 22:05:06,158 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,161 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 6 treesize of output 2 [2021-06-05 22:05:06,162 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,165 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 4 treesize of output 2 [2021-06-05 22:05:06,166 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,169 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 3 treesize of output 1 [2021-06-05 22:05:06,170 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,174 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 4 treesize of output 2 [2021-06-05 22:05:06,174 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,178 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 5 treesize of output 1 [2021-06-05 22:05:06,178 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,182 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 4 treesize of output 2 [2021-06-05 22:05:06,183 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,186 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 3 treesize of output 1 [2021-06-05 22:05:06,186 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:06,387 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 22:05:06,387 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.1 percent of original size [2021-06-05 22:05:06,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:05:06,390 INFO L247 ElimStorePlain]: Needed 44 recursive calls to eliminate 3 variables, input treesize:1420, output treesize:179 [2021-06-05 22:05:06,547 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 22:05:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:06,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947820717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:06,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:06,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:05:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321804238] [2021-06-05 22:05:06,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:05:06,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:06,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:05:06,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:06,886 INFO L87 Difference]: Start difference. First operand 685 states and 2314 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,340 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 22:05:07,473 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 22:05:08,055 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 22:05:08,250 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 22:05:08,450 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-06-05 22:05:08,675 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2021-06-05 22:05:08,821 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-06-05 22:05:09,005 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 22:05:09,322 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-06-05 22:05:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:09,353 INFO L93 Difference]: Finished difference Result 987 states and 3182 transitions. [2021-06-05 22:05:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:05:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:09,354 INFO L225 Difference]: With dead ends: 987 [2021-06-05 22:05:09,354 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 22:05:09,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2986.8ms TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:05:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 22:05:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 685. [2021-06-05 22:05:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.3830409356725144) internal successors, (2314), 684 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2314 transitions. [2021-06-05 22:05:09,363 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2314 transitions. Word has length 20 [2021-06-05 22:05:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:09,363 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2314 transitions. [2021-06-05 22:05:09,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2314 transitions. [2021-06-05 22:05:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:09,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:09,364 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:09,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4329,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:09,565 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash 456394796, now seen corresponding path program 40 times [2021-06-05 22:05:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:09,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877350278] [2021-06-05 22:05:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:09,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:09,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877350278] [2021-06-05 22:05:09,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877350278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:09,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986277756] [2021-06-05 22:05:09,896 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 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 22:05:09,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:05:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:10,149 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 22:05:10,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:10,547 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:05:10,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,019 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 92 [2021-06-05 22:05:11,019 INFO L628 ElimStorePlain]: treesize reduction 625, result has 36.3 percent of original size [2021-06-05 22:05:11,024 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 3 treesize of output 1 [2021-06-05 22:05:11,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,214 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:05:11,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,220 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 3 treesize of output 1 [2021-06-05 22:05:11,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,401 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 22:05:11,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,402 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-05 22:05:11,406 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 4 treesize of output 2 [2021-06-05 22:05:11,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,411 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 4 treesize of output 2 [2021-06-05 22:05:11,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,584 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 22:05:11,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,588 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 4 treesize of output 2 [2021-06-05 22:05:11,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,594 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 4 treesize of output 2 [2021-06-05 22:05:11,595 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,765 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:05:11,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_217 vanished before elimination [2021-06-05 22:05:11,771 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 5 treesize of output 1 [2021-06-05 22:05:11,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,935 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:05:11,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:05:11,941 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:989, output treesize:329 [2021-06-05 22:05:12,119 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:05:13,096 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, v_prenex_228], 3=[v_prenex_232], 10=[ends_with_2, v_prenex_225], 15=[v_prenex_229]} [2021-06-05 22:05:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:13,104 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:05:13,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:13,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:13,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:13,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:13,126 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:13,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:13,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,357 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 75 [2021-06-05 22:05:13,357 INFO L628 ElimStorePlain]: treesize reduction 553, result has 25.0 percent of original size [2021-06-05 22:05:13,361 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 3 treesize of output 1 [2021-06-05 22:05:13,362 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,366 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 3 treesize of output 1 [2021-06-05 22:05:13,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:13,449 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 4 treesize of output 2 [2021-06-05 22:05:13,450 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,454 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 3 treesize of output 1 [2021-06-05 22:05:13,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:13,527 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 4 treesize of output 2 [2021-06-05 22:05:13,528 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:13,602 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 3 treesize of output 1 [2021-06-05 22:05:13,603 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,606 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 5 treesize of output 1 [2021-06-05 22:05:13,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:13,676 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 6 treesize of output 2 [2021-06-05 22:05:13,676 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,679 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 5 treesize of output 1 [2021-06-05 22:05:13,680 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:13,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:13,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:05:13,741 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 13 variables, input treesize:923, output treesize:106 [2021-06-05 22:05:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:13,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986277756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:13,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:13,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:05:13,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178990659] [2021-06-05 22:05:13,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:05:13,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:05:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:13,873 INFO L87 Difference]: Start difference. First operand 685 states and 2314 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,369 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2021-06-05 22:05:14,863 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-06-05 22:05:15,132 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2021-06-05 22:05:15,649 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2021-06-05 22:05:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:16,057 INFO L93 Difference]: Finished difference Result 935 states and 2969 transitions. [2021-06-05 22:05:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:05:16,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:16,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:16,058 INFO L225 Difference]: With dead ends: 935 [2021-06-05 22:05:16,058 INFO L226 Difference]: Without dead ends: 890 [2021-06-05 22:05:16,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2648.5ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:05:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-05 22:05:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 687. [2021-06-05 22:05:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3877551020408165) internal successors, (2324), 686 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2324 transitions. [2021-06-05 22:05:16,066 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2324 transitions. Word has length 20 [2021-06-05 22:05:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:16,066 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2324 transitions. [2021-06-05 22:05:16,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2324 transitions. [2021-06-05 22:05:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:16,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:16,067 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:16,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4644 [2021-06-05 22:05:16,268 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash 399043292, now seen corresponding path program 41 times [2021-06-05 22:05:16,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:16,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286463800] [2021-06-05 22:05:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:16,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286463800] [2021-06-05 22:05:16,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286463800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068115365] [2021-06-05 22:05:16,500 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 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 22:05:16,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:16,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:16,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:05:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068115365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:16,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:05:16,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419458442] [2021-06-05 22:05:16,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:16,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:16,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:16,966 INFO L87 Difference]: Start difference. First operand 687 states and 2324 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:05:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:17,688 INFO L93 Difference]: Finished difference Result 781 states and 2556 transitions. [2021-06-05 22:05:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:05:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:17,690 INFO L225 Difference]: With dead ends: 781 [2021-06-05 22:05:17,690 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 22:05:17,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 22:05:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 690. [2021-06-05 22:05:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.388969521044993) internal successors, (2335), 689 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2335 transitions. [2021-06-05 22:05:17,698 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2335 transitions. Word has length 20 [2021-06-05 22:05:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:17,698 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 2335 transitions. [2021-06-05 22:05:17,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:05:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2335 transitions. [2021-06-05 22:05:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:17,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:17,700 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:17,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4881 [2021-06-05 22:05:17,922 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1825343152, now seen corresponding path program 42 times [2021-06-05 22:05:17,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:17,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827668205] [2021-06-05 22:05:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:18,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:18,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827668205] [2021-06-05 22:05:18,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827668205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144460553] [2021-06-05 22:05:18,374 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 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 22:05:18,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:18,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:05:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:18,801 INFO L446 ElimStorePlain]: Different costs {10=[ends_with_2, v_prenex_235], 15=[v_prenex_239]} [2021-06-05 22:05:18,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:18,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:18,811 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:18,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:18,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:18,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:18,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:18,831 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:18,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:18,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:05:18,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,408 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 108 [2021-06-05 22:05:19,408 INFO L628 ElimStorePlain]: treesize reduction 494, result has 50.5 percent of original size [2021-06-05 22:05:19,413 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 3 treesize of output 1 [2021-06-05 22:05:19,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,419 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 5 treesize of output 1 [2021-06-05 22:05:19,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,665 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:05:19,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:19,671 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 4 treesize of output 2 [2021-06-05 22:05:19,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,677 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 6 treesize of output 2 [2021-06-05 22:05:19,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,683 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 6 treesize of output 2 [2021-06-05 22:05:19,684 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,688 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 6 treesize of output 2 [2021-06-05 22:05:19,689 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,694 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 6 treesize of output 2 [2021-06-05 22:05:19,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,707 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 6 treesize of output 2 [2021-06-05 22:05:19,709 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,940 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:05:19,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:19,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:05:19,953 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:1117, output treesize:461 [2021-06-05 22:05:20,296 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 131 [2021-06-05 22:05:20,719 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 92 [2021-06-05 22:05:23,197 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_255, v_prenex_262], 15=[v_prenex_265, v_prenex_256, ends_with_10], 21=[ends_with_6]} [2021-06-05 22:05:23,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:23,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:23,210 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:23,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:23,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:23,222 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:05:23,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:23,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:23,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:23,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:23,266 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 22:05:23,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,656 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 102 [2021-06-05 22:05:23,657 INFO L628 ElimStorePlain]: treesize reduction 764, result has 25.8 percent of original size [2021-06-05 22:05:23,668 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 5 treesize of output 1 [2021-06-05 22:05:23,669 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,674 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 3 treesize of output 1 [2021-06-05 22:05:23,675 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,791 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:05:23,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:23,797 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 3 treesize of output 1 [2021-06-05 22:05:23,798 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,802 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 3 treesize of output 1 [2021-06-05 22:05:23,803 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:23,916 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 22:05:23,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:23,922 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 3 treesize of output 1 [2021-06-05 22:05:23,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:24,033 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:05:24,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:24,039 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 5 treesize of output 1 [2021-06-05 22:05:24,039 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:24,044 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 5 treesize of output 1 [2021-06-05 22:05:24,045 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:24,050 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 4 treesize of output 2 [2021-06-05 22:05:24,051 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:24,153 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:05:24,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:24,158 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 6 treesize of output 2 [2021-06-05 22:05:24,159 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:24,163 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 4 treesize of output 2 [2021-06-05 22:05:24,164 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:24,168 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 4 treesize of output 2 [2021-06-05 22:05:24,169 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:24,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:24,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:05:24,272 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 22 variables, input treesize:1321, output treesize:163 [2021-06-05 22:05:24,441 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-06-05 22:05:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144460553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:24,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:05:24,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057260824] [2021-06-05 22:05:24,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:05:24,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:05:24,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:24,644 INFO L87 Difference]: Start difference. First operand 690 states and 2335 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:05:25,332 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 105 [2021-06-05 22:05:25,804 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 22:05:26,028 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 22:05:26,232 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-06-05 22:05:26,471 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-06-05 22:05:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:26,486 INFO L93 Difference]: Finished difference Result 877 states and 2844 transitions. [2021-06-05 22:05:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:05:26,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:05:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:26,488 INFO L225 Difference]: With dead ends: 877 [2021-06-05 22:05:26,488 INFO L226 Difference]: Without dead ends: 832 [2021-06-05 22:05:26,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2827.0ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:05:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-05 22:05:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 688. [2021-06-05 22:05:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.388646288209607) internal successors, (2328), 687 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2328 transitions. [2021-06-05 22:05:26,496 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2328 transitions. Word has length 20 [2021-06-05 22:05:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:26,496 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2328 transitions. [2021-06-05 22:05:26,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:05:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2328 transitions. [2021-06-05 22:05:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:26,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:26,497 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:26,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4903 [2021-06-05 22:05:26,697 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:26,698 INFO L82 PathProgramCache]: Analyzing trace with hash -640261172, now seen corresponding path program 43 times [2021-06-05 22:05:26,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:26,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917497611] [2021-06-05 22:05:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:27,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917497611] [2021-06-05 22:05:27,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917497611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844139465] [2021-06-05 22:05:27,027 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 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 22:05:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:05:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:27,295 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 22:05:27,653 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_272, v_prenex_274], 15=[ends_with_2]} [2021-06-05 22:05:27,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,662 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:27,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,670 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:27,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,677 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:05:27,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,685 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:27,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,252 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 110 [2021-06-05 22:05:28,252 INFO L628 ElimStorePlain]: treesize reduction 502, result has 50.2 percent of original size [2021-06-05 22:05:28,257 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 3 treesize of output 1 [2021-06-05 22:05:28,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,263 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 5 treesize of output 1 [2021-06-05 22:05:28,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,503 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:05:28,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:28,509 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 4 treesize of output 2 [2021-06-05 22:05:28,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,530 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 6 treesize of output 2 [2021-06-05 22:05:28,531 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,536 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 4 treesize of output 2 [2021-06-05 22:05:28,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,542 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 6 treesize of output 2 [2021-06-05 22:05:28,543 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,548 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 4 treesize of output 2 [2021-06-05 22:05:28,549 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,554 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 4 treesize of output 2 [2021-06-05 22:05:28,555 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,786 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 22:05:28,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:28,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:05:28,799 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:1131, output treesize:471 [2021-06-05 22:05:29,174 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 133 [2021-06-05 22:05:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:31,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 22:05:31,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:31,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:31,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:31,383 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:31,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:31,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:31,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:31,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:05:31,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:31,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:31,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:31,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:31,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:32,342 WARN L205 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 171 [2021-06-05 22:05:32,343 INFO L628 ElimStorePlain]: treesize reduction 1707, result has 23.3 percent of original size [2021-06-05 22:05:32,350 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 4 treesize of output 2 [2021-06-05 22:05:32,351 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:32,609 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 22:05:32,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:32,616 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 6 treesize of output 2 [2021-06-05 22:05:32,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:32,860 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-06-05 22:05:32,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:32,869 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 4 treesize of output 2 [2021-06-05 22:05:32,870 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:32,877 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 4 treesize of output 2 [2021-06-05 22:05:32,878 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:33,114 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 22:05:33,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:33,122 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 5 treesize of output 1 [2021-06-05 22:05:33,122 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:33,354 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-05 22:05:33,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:33,361 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 5 treesize of output 1 [2021-06-05 22:05:33,362 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:33,600 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-05 22:05:33,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:33,607 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 3 treesize of output 1 [2021-06-05 22:05:33,608 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:33,839 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-05 22:05:33,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:33,846 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 3 treesize of output 1 [2021-06-05 22:05:33,847 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:34,072 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 22:05:34,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:34,080 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 4 treesize of output 2 [2021-06-05 22:05:34,081 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:34,087 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 6 treesize of output 2 [2021-06-05 22:05:34,088 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:34,311 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 22:05:34,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:34,317 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 3 treesize of output 1 [2021-06-05 22:05:34,318 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:34,541 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 22:05:34,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:34,548 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 5 treesize of output 1 [2021-06-05 22:05:34,549 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:34,769 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-05 22:05:34,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:34,776 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 5 treesize of output 1 [2021-06-05 22:05:34,777 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:34,994 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 22:05:34,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:35,000 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 4 treesize of output 2 [2021-06-05 22:05:35,001 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:35,219 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 22:05:35,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:35,226 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 6 treesize of output 2 [2021-06-05 22:05:35,227 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:35,232 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 6 treesize of output 2 [2021-06-05 22:05:35,233 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:35,442 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 22:05:35,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:35,448 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 4 treesize of output 2 [2021-06-05 22:05:35,449 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:35,455 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 4 treesize of output 2 [2021-06-05 22:05:35,456 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:35,665 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 22:05:35,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:35,671 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 6 treesize of output 2 [2021-06-05 22:05:35,672 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:35,877 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:05:35,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:35,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 16 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:05:35,884 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 25 variables, input treesize:2477, output treesize:337 [2021-06-05 22:05:36,172 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 22:05:36,390 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 22:05:36,546 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-05 22:05:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844139465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:36,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:05:36,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619208253] [2021-06-05 22:05:36,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:05:36,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:05:36,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:36,616 INFO L87 Difference]: Start difference. First operand 688 states and 2328 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:05:37,252 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-06-05 22:05:37,560 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 22:05:37,801 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2021-06-05 22:05:38,056 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2021-06-05 22:05:38,339 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2021-06-05 22:05:38,580 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2021-06-05 22:05:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:38,599 INFO L93 Difference]: Finished difference Result 899 states and 2933 transitions. [2021-06-05 22:05:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:05:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:05:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:38,600 INFO L225 Difference]: With dead ends: 899 [2021-06-05 22:05:38,601 INFO L226 Difference]: Without dead ends: 854 [2021-06-05 22:05:38,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2906.6ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-06-05 22:05:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 687. [2021-06-05 22:05:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3862973760932946) internal successors, (2323), 686 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2323 transitions. [2021-06-05 22:05:38,609 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2323 transitions. Word has length 20 [2021-06-05 22:05:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:38,609 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2323 transitions. [2021-06-05 22:05:38,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:05:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2323 transitions. [2021-06-05 22:05:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:38,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:38,610 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:38,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5211 [2021-06-05 22:05:38,820 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash -877073888, now seen corresponding path program 44 times [2021-06-05 22:05:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:38,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794123270] [2021-06-05 22:05:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:39,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794123270] [2021-06-05 22:05:39,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794123270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037653867] [2021-06-05 22:05:39,158 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 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 22:05:39,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:05:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:39,399 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 22:05:39,852 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_298, v_prenex_297, v_prenex_300, v_prenex_301, ends_with_10, v_prenex_296], 6=[v_prenex_303]} [2021-06-05 22:05:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:39,858 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:39,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,157 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-06-05 22:05:40,158 INFO L628 ElimStorePlain]: treesize reduction 214, result has 58.5 percent of original size [2021-06-05 22:05:40,158 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-05 22:05:40,162 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 6 treesize of output 2 [2021-06-05 22:05:40,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,416 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 22:05:40,416 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.3 percent of original size [2021-06-05 22:05:40,421 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 4 treesize of output 2 [2021-06-05 22:05:40,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,544 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 22:05:40,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:40,548 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 3 treesize of output 1 [2021-06-05 22:05:40,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,672 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 22:05:40,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:40,676 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 3 treesize of output 1 [2021-06-05 22:05:40,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,805 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 22:05:40,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:40,809 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 6 treesize of output 2 [2021-06-05 22:05:40,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,813 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 6 treesize of output 2 [2021-06-05 22:05:40,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,817 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 6 treesize of output 2 [2021-06-05 22:05:40,818 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,932 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 22:05:40,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:40,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 7 dim-1 vars, End of recursive call: 4 dim-0 vars, and 9 xjuncts. [2021-06-05 22:05:40,938 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:551, output treesize:263 [2021-06-05 22:05:41,154 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 22:05:42,281 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_6, v_prenex_309], 3=[v_prenex_312], 10=[ends_with_2, v_prenex_306], 15=[v_prenex_311]} [2021-06-05 22:05:42,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,300 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:42,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:42,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,318 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:42,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,326 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:42,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:42,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,341 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 3 treesize of output 1 [2021-06-05 22:05:42,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:42,348 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,966 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 93 [2021-06-05 22:05:42,966 INFO L628 ElimStorePlain]: treesize reduction 659, result has 48.6 percent of original size [2021-06-05 22:05:42,971 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 6 treesize of output 2 [2021-06-05 22:05:42,972 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,976 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 6 treesize of output 2 [2021-06-05 22:05:42,977 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,249 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:05:43,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:43,254 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 5 treesize of output 1 [2021-06-05 22:05:43,255 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,259 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 5 treesize of output 1 [2021-06-05 22:05:43,260 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,264 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 6 treesize of output 2 [2021-06-05 22:05:43,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,270 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 4 treesize of output 2 [2021-06-05 22:05:43,270 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,275 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 4 treesize of output 2 [2021-06-05 22:05:43,276 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,287 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 4 treesize of output 2 [2021-06-05 22:05:43,288 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,295 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 5 treesize of output 1 [2021-06-05 22:05:43,296 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,301 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 4 treesize of output 2 [2021-06-05 22:05:43,302 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,307 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 4 treesize of output 2 [2021-06-05 22:05:43,307 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,312 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 4 treesize of output 2 [2021-06-05 22:05:43,313 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,317 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 4 treesize of output 2 [2021-06-05 22:05:43,318 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,322 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 4 treesize of output 2 [2021-06-05 22:05:43,323 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,328 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 6 treesize of output 2 [2021-06-05 22:05:43,329 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,767 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-06-05 22:05:43,767 INFO L628 ElimStorePlain]: treesize reduction 69, result has 87.5 percent of original size [2021-06-05 22:05:43,771 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 3 treesize of output 1 [2021-06-05 22:05:43,772 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,776 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 3 treesize of output 1 [2021-06-05 22:05:43,776 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,983 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 22:05:43,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:43,988 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 5 treesize of output 1 [2021-06-05 22:05:43,989 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:43,992 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 5 treesize of output 1 [2021-06-05 22:05:43,993 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,194 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 22:05:44,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:44,198 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 6 treesize of output 2 [2021-06-05 22:05:44,199 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,203 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 6 treesize of output 2 [2021-06-05 22:05:44,204 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,208 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 4 treesize of output 2 [2021-06-05 22:05:44,209 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,213 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 6 treesize of output 2 [2021-06-05 22:05:44,214 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,218 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 6 treesize of output 2 [2021-06-05 22:05:44,219 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,223 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 4 treesize of output 2 [2021-06-05 22:05:44,224 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,228 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 4 treesize of output 2 [2021-06-05 22:05:44,228 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,232 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 4 treesize of output 2 [2021-06-05 22:05:44,233 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,237 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 4 treesize of output 2 [2021-06-05 22:05:44,238 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,242 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 6 treesize of output 2 [2021-06-05 22:05:44,243 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,247 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 6 treesize of output 2 [2021-06-05 22:05:44,248 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,600 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 22:05:44,601 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 22:05:44,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 6 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 22:05:44,606 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 16 variables, input treesize:1485, output treesize:323 [2021-06-05 22:05:44,780 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 22:05:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037653867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:44,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:05:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284926464] [2021-06-05 22:05:44,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:05:44,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:44,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:05:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:44,955 INFO L87 Difference]: Start difference. First operand 687 states and 2323 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,460 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 22:05:45,767 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 22:05:46,038 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-05 22:05:46,271 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-05 22:05:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:46,301 INFO L93 Difference]: Finished difference Result 876 states and 2869 transitions. [2021-06-05 22:05:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:46,308 INFO L225 Difference]: With dead ends: 876 [2021-06-05 22:05:46,308 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 22:05:46,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2045.9ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 22:05:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 687. [2021-06-05 22:05:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3862973760932946) internal successors, (2323), 686 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2323 transitions. [2021-06-05 22:05:46,316 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2323 transitions. Word has length 20 [2021-06-05 22:05:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:46,316 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2323 transitions. [2021-06-05 22:05:46,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2323 transitions. [2021-06-05 22:05:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:46,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:46,317 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:46,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5965,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:46,517 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash -570151136, now seen corresponding path program 45 times [2021-06-05 22:05:46,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:46,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160620475] [2021-06-05 22:05:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:46,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160620475] [2021-06-05 22:05:46,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160620475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294879617] [2021-06-05 22:05:46,755 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 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 22:05:46,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:46,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:46,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:05:46,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:46,972 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 22:05:47,570 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_321, ends_with_10], 15=[v_prenex_323]} [2021-06-05 22:05:47,578 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 6 treesize of output 2 [2021-06-05 22:05:47,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,588 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 22:05:47,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:47,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:47,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:47,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,606 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:47,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,174 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 142 [2021-06-05 22:05:48,175 INFO L628 ElimStorePlain]: treesize reduction 214, result has 73.6 percent of original size [2021-06-05 22:05:48,181 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 3 treesize of output 1 [2021-06-05 22:05:48,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,187 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 4 treesize of output 2 [2021-06-05 22:05:48,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,194 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 4 treesize of output 2 [2021-06-05 22:05:48,194 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,200 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 4 treesize of output 2 [2021-06-05 22:05:48,201 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,207 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 4 treesize of output 2 [2021-06-05 22:05:48,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,213 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 6 treesize of output 2 [2021-06-05 22:05:48,214 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,702 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 134 [2021-06-05 22:05:48,703 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.5 percent of original size [2021-06-05 22:05:48,709 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 3 treesize of output 1 [2021-06-05 22:05:48,709 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,715 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 3 treesize of output 1 [2021-06-05 22:05:48,716 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,722 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 3 treesize of output 1 [2021-06-05 22:05:48,723 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:48,965 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 22:05:48,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:48,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 13 xjuncts. [2021-06-05 22:05:48,982 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 12 variables, input treesize:892, output treesize:549 [2021-06-05 22:05:49,318 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 118 [2021-06-05 22:05:51,688 INFO L446 ElimStorePlain]: Different costs {10=[ends_with_6], 15=[ends_with_2], 21=[v_prenex_338], 28=[v_prenex_337]} [2021-06-05 22:05:51,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:51,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:51,699 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:51,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:51,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:51,710 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:51,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:51,720 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 3 treesize of output 1 [2021-06-05 22:05:51,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:51,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:51,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:51,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:51,741 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:51,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:51,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:51,750 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:51,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:51,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:51,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,428 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 135 [2021-06-05 22:05:52,428 INFO L628 ElimStorePlain]: treesize reduction 615, result has 50.2 percent of original size [2021-06-05 22:05:52,434 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 3 treesize of output 1 [2021-06-05 22:05:52,435 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,441 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 3 treesize of output 1 [2021-06-05 22:05:52,442 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,726 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 22:05:52,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:52,732 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 4 treesize of output 2 [2021-06-05 22:05:52,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,739 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 6 treesize of output 2 [2021-06-05 22:05:52,740 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,746 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 4 treesize of output 2 [2021-06-05 22:05:52,747 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,752 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 6 treesize of output 2 [2021-06-05 22:05:52,753 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,759 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 4 treesize of output 2 [2021-06-05 22:05:52,760 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,766 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 5 treesize of output 1 [2021-06-05 22:05:52,767 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,772 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 4 treesize of output 2 [2021-06-05 22:05:52,773 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,779 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 4 treesize of output 2 [2021-06-05 22:05:52,780 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,786 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 5 treesize of output 1 [2021-06-05 22:05:52,787 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,792 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 5 treesize of output 1 [2021-06-05 22:05:52,793 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,799 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 6 treesize of output 2 [2021-06-05 22:05:52,800 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,046 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 22:05:53,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:53,053 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 6 treesize of output 2 [2021-06-05 22:05:53,054 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,059 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 4 treesize of output 2 [2021-06-05 22:05:53,060 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,066 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 6 treesize of output 2 [2021-06-05 22:05:53,066 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,072 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 6 treesize of output 2 [2021-06-05 22:05:53,073 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,078 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 4 treesize of output 2 [2021-06-05 22:05:53,079 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,085 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 5 treesize of output 1 [2021-06-05 22:05:53,086 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,091 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 4 treesize of output 2 [2021-06-05 22:05:53,092 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,098 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 6 treesize of output 2 [2021-06-05 22:05:53,099 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,104 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 5 treesize of output 1 [2021-06-05 22:05:53,105 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,111 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 5 treesize of output 1 [2021-06-05 22:05:53,112 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,117 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 4 treesize of output 2 [2021-06-05 22:05:53,118 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,562 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2021-06-05 22:05:53,563 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 22:05:53,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 4 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 22:05:53,569 INFO L247 ElimStorePlain]: Needed 32 recursive calls to eliminate 19 variables, input treesize:1507, output treesize:404 [2021-06-05 22:05:53,777 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-05 22:05:53,988 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-06-05 22:05:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294879617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:54,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:05:54,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121475914] [2021-06-05 22:05:54,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:05:54,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:05:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:54,215 INFO L87 Difference]: Start difference. First operand 687 states and 2323 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:05:54,746 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-06-05 22:05:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:54,771 INFO L93 Difference]: Finished difference Result 803 states and 2652 transitions. [2021-06-05 22:05:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:05:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:54,773 INFO L225 Difference]: With dead ends: 803 [2021-06-05 22:05:54,773 INFO L226 Difference]: Without dead ends: 788 [2021-06-05 22:05:54,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1472.0ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-06-05 22:05:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 687. [2021-06-05 22:05:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3862973760932946) internal successors, (2323), 686 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2323 transitions. [2021-06-05 22:05:54,781 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2323 transitions. Word has length 20 [2021-06-05 22:05:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:54,782 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2323 transitions. [2021-06-05 22:05:54,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:05:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2323 transitions. [2021-06-05 22:05:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:54,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:54,783 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:54,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6175 [2021-06-05 22:05:54,997 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -153141940, now seen corresponding path program 46 times [2021-06-05 22:05:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:54,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524266226] [2021-06-05 22:05:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524266226] [2021-06-05 22:05:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524266226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577697004] [2021-06-05 22:05:55,312 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 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 22:05:55,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:55,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:05:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:55,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,885 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:55,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,892 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:05:55,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,901 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:55,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:55,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,917 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:05:55,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,926 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:55,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,933 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:55,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:55,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:55,943 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:55,948 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,953 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:55,953 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,958 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:55,959 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,964 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:55,965 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,970 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:55,970 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,984 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:55,985 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,989 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:05:55,990 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:55,994 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:55,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:55,999 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:05:56,000 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,004 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:56,005 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:56,009 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,014 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:56,015 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,019 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:56,020 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,024 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:05:56,024 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,029 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:05:56,030 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:56,033 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:56,034 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:56,360 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 22:05:56,360 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 22:05:56,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:05:56,365 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:357 [2021-06-05 22:05:56,658 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-06-05 22:05:58,398 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_350], 6=[ends_with_10], 21=[v_prenex_349], 36=[ends_with_2]} [2021-06-05 22:05:58,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:58,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,414 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 3 treesize of output 1 [2021-06-05 22:05:58,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:58,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:58,423 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:58,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:58,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:58,431 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:05:58,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:58,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:58,446 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:58,453 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:58,460 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:05:58,461 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,981 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2021-06-05 22:05:58,981 INFO L628 ElimStorePlain]: treesize reduction 1212, result has 26.0 percent of original size [2021-06-05 22:05:58,987 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 4 treesize of output 2 [2021-06-05 22:05:58,988 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,993 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 4 treesize of output 2 [2021-06-05 22:05:58,993 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:58,998 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 4 treesize of output 2 [2021-06-05 22:05:58,999 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,004 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 4 treesize of output 2 [2021-06-05 22:05:59,005 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:59,010 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,201 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 22:05:59,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:59,216 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 3 treesize of output 1 [2021-06-05 22:05:59,217 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,221 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 5 treesize of output 1 [2021-06-05 22:05:59,222 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,409 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 22:05:59,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:59,414 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 4 treesize of output 2 [2021-06-05 22:05:59,415 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,420 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 4 treesize of output 2 [2021-06-05 22:05:59,420 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,425 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 5 treesize of output 1 [2021-06-05 22:05:59,425 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,430 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 4 treesize of output 2 [2021-06-05 22:05:59,431 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,435 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 4 treesize of output 2 [2021-06-05 22:05:59,436 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,440 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 3 treesize of output 1 [2021-06-05 22:05:59,440 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,445 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 4 treesize of output 2 [2021-06-05 22:05:59,445 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,450 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 6 treesize of output 2 [2021-06-05 22:05:59,450 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,454 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 6 treesize of output 2 [2021-06-05 22:05:59,455 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:59,622 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 22:05:59,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:59,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 22:05:59,626 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 13 variables, input treesize:1934, output treesize:270 [2021-06-05 22:05:59,811 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 22:06:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:00,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577697004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:00,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:00,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:06:00,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371787256] [2021-06-05 22:06:00,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:00,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:00,081 INFO L87 Difference]: Start difference. First operand 687 states and 2323 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:01,257 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2021-06-05 22:06:01,583 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-06-05 22:06:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:01,621 INFO L93 Difference]: Finished difference Result 977 states and 3160 transitions. [2021-06-05 22:06:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:06:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:01,623 INFO L225 Difference]: With dead ends: 977 [2021-06-05 22:06:01,623 INFO L226 Difference]: Without dead ends: 962 [2021-06-05 22:06:01,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2240.6ms TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:06:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-06-05 22:06:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 693. [2021-06-05 22:06:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.38728323699422) internal successors, (2344), 692 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2344 transitions. [2021-06-05 22:06:01,631 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2344 transitions. Word has length 20 [2021-06-05 22:06:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:01,631 INFO L482 AbstractCegarLoop]: Abstraction has 693 states and 2344 transitions. [2021-06-05 22:06:01,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2344 transitions. [2021-06-05 22:06:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:01,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:01,632 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:01,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6572,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:01,833 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1665161384, now seen corresponding path program 47 times [2021-06-05 22:06:01,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:01,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259052093] [2021-06-05 22:06:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:02,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:02,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259052093] [2021-06-05 22:06:02,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259052093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678639052] [2021-06-05 22:06:02,094 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 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 22:06:02,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:02,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:06:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:02,455 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 22:06:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:02,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678639052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:02,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:06:02,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229116712] [2021-06-05 22:06:02,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:06:02,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:06:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:02,712 INFO L87 Difference]: Start difference. First operand 693 states and 2344 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:06:03,291 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 22:06:03,467 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-05 22:06:03,637 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-06-05 22:06:03,960 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 22:06:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:04,110 INFO L93 Difference]: Finished difference Result 796 states and 2609 transitions. [2021-06-05 22:06:04,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:06:04,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:06:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:04,112 INFO L225 Difference]: With dead ends: 796 [2021-06-05 22:06:04,112 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 22:06:04,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1760.8ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:06:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 22:06:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 691. [2021-06-05 22:06:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.3869565217391306) internal successors, (2337), 690 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2337 transitions. [2021-06-05 22:06:04,119 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2337 transitions. Word has length 20 [2021-06-05 22:06:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:04,119 INFO L482 AbstractCegarLoop]: Abstraction has 691 states and 2337 transitions. [2021-06-05 22:06:04,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:06:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2337 transitions. [2021-06-05 22:06:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:04,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:04,120 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:04,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7082 [2021-06-05 22:06:04,321 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1872779544, now seen corresponding path program 48 times [2021-06-05 22:06:04,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:04,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528236814] [2021-06-05 22:06:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:04,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:04,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528236814] [2021-06-05 22:06:04,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528236814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:04,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007936956] [2021-06-05 22:06:04,595 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 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 22:06:04,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:04,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:04,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:06:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:04,919 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 22:06:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:05,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007936956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:05,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:05,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:06:05,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514858197] [2021-06-05 22:06:05,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:05,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:05,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:05,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:05,145 INFO L87 Difference]: Start difference. First operand 691 states and 2337 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:05,432 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 22:06:05,643 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 22:06:06,016 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-05 22:06:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:06,038 INFO L93 Difference]: Finished difference Result 860 states and 2776 transitions. [2021-06-05 22:06:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:06:06,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:06:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:06,039 INFO L225 Difference]: With dead ends: 860 [2021-06-05 22:06:06,039 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 22:06:06,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1264.7ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 22:06:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 701. [2021-06-05 22:06:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.394285714285714) internal successors, (2376), 700 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2376 transitions. [2021-06-05 22:06:06,047 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2376 transitions. Word has length 20 [2021-06-05 22:06:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:06,047 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2376 transitions. [2021-06-05 22:06:06,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2376 transitions. [2021-06-05 22:06:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:06,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:06,048 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:06,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7105,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:06,249 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1843084844, now seen corresponding path program 49 times [2021-06-05 22:06:06,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:06,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929961088] [2021-06-05 22:06:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:06,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:06,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929961088] [2021-06-05 22:06:06,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929961088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:06,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671723598] [2021-06-05 22:06:06,599 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 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 22:06:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:06:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:07,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,245 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,252 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:07,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,258 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,264 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:07,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,270 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:07,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,277 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:07,277 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,283 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:06:07,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,290 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,290 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,296 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:07,297 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:07,303 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,309 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:07,310 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:07,315 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,321 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,322 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:07,326 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:07,331 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:07,336 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,342 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:07,343 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,348 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,349 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:07,353 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,358 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:06:07,359 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,364 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,365 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,370 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:07,371 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,376 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,377 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,382 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:07,382 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:07,388 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,393 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:07,394 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:07,400 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,404 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:07,405 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,410 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,411 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:07,415 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:07,416 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:07,694 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 22:06:07,694 INFO L628 ElimStorePlain]: treesize reduction 121, result has 70.2 percent of original size [2021-06-05 22:06:07,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:06:07,698 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 2 variables, input treesize:1382, output treesize:285 [2021-06-05 22:06:07,983 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-06-05 22:06:08,507 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6], 1=[v_prenex_368, v_prenex_362], 3=[v_prenex_370], 6=[ends_with_2], 10=[v_prenex_365, v_prenex_369, v_prenex_360, v_prenex_361]} [2021-06-05 22:06:08,515 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 6 treesize of output 2 [2021-06-05 22:06:08,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:08,527 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 6 treesize of output 2 [2021-06-05 22:06:08,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:08,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:08,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:08,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:08,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,075 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 132 [2021-06-05 22:06:09,076 INFO L628 ElimStorePlain]: treesize reduction 318, result has 61.3 percent of original size [2021-06-05 22:06:09,090 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 6 treesize of output 2 [2021-06-05 22:06:09,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,097 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 4 treesize of output 2 [2021-06-05 22:06:09,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,104 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 4 treesize of output 2 [2021-06-05 22:06:09,105 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,321 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:06:09,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:09,327 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 3 treesize of output 1 [2021-06-05 22:06:09,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,334 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 5 treesize of output 1 [2021-06-05 22:06:09,335 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,550 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 22:06:09,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:09,556 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 5 treesize of output 1 [2021-06-05 22:06:09,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,563 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 5 treesize of output 1 [2021-06-05 22:06:09,563 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,569 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 3 treesize of output 1 [2021-06-05 22:06:09,570 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,575 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 5 treesize of output 1 [2021-06-05 22:06:09,576 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,584 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 5 treesize of output 1 [2021-06-05 22:06:09,585 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,787 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 22:06:09,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:09,794 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 5 treesize of output 1 [2021-06-05 22:06:09,794 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,800 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 5 treesize of output 1 [2021-06-05 22:06:09,801 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:09,996 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 22:06:09,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:10,002 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 4 treesize of output 2 [2021-06-05 22:06:10,003 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:10,010 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,016 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 6 treesize of output 2 [2021-06-05 22:06:10,016 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,209 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 22:06:10,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:10,215 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 3 treesize of output 1 [2021-06-05 22:06:10,217 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,223 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 5 treesize of output 1 [2021-06-05 22:06:10,223 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,580 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-06-05 22:06:10,580 INFO L628 ElimStorePlain]: treesize reduction 39, result has 90.9 percent of original size [2021-06-05 22:06:10,585 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 4 treesize of output 2 [2021-06-05 22:06:10,586 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,591 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 6 treesize of output 2 [2021-06-05 22:06:10,592 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,597 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 6 treesize of output 2 [2021-06-05 22:06:10,598 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,763 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 22:06:10,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:10,768 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 3 treesize of output 1 [2021-06-05 22:06:10,769 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,933 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:06:10,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:10,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 9 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:06:10,937 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 20 variables, input treesize:933, output treesize:290 [2021-06-05 22:06:11,173 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 22:06:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:11,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671723598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:11,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:11,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:06:11,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585623738] [2021-06-05 22:06:11,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:11,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:11,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:11,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:11,470 INFO L87 Difference]: Start difference. First operand 701 states and 2376 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:11,620 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-06-05 22:06:11,916 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 32 [2021-06-05 22:06:12,183 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 37 [2021-06-05 22:06:12,827 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 22:06:13,067 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-05 22:06:13,224 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-06-05 22:06:13,609 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 22:06:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:13,641 INFO L93 Difference]: Finished difference Result 1010 states and 3260 transitions. [2021-06-05 22:06:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:06:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:06:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:13,643 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 22:06:13,643 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 22:06:13,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2904.4ms TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:06:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 22:06:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 701. [2021-06-05 22:06:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.394285714285714) internal successors, (2376), 700 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2376 transitions. [2021-06-05 22:06:13,655 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2376 transitions. Word has length 20 [2021-06-05 22:06:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:13,655 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2376 transitions. [2021-06-05 22:06:13,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2376 transitions. [2021-06-05 22:06:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:13,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:13,656 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:13,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7124 [2021-06-05 22:06:13,869 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2081522154, now seen corresponding path program 50 times [2021-06-05 22:06:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:13,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238955511] [2021-06-05 22:06:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:14,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:14,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238955511] [2021-06-05 22:06:14,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238955511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:14,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551761140] [2021-06-05 22:06:14,113 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 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 22:06:14,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:14,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:14,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:06:14,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:14,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,359 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:14,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,364 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:14,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:14,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,373 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:14,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,378 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,378 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,382 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,386 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:14,387 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,391 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:14,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:14,395 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,403 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,404 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,408 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,408 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,412 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:14,413 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,417 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,418 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,421 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:14,422 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:14,426 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,429 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,429 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:14,433 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:14,436 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:14,437 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:14,441 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:14,631 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 22:06:14,631 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 22:06:14,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:06:14,633 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:699, output treesize:220 [2021-06-05 22:06:15,129 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 22:06:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:15,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551761140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:15,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:06:15,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592921576] [2021-06-05 22:06:15,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:15,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:15,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:15,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:15,264 INFO L87 Difference]: Start difference. First operand 701 states and 2376 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:15,536 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 22:06:15,708 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 22:06:15,989 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-05 22:06:16,124 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-06-05 22:06:16,296 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 22:06:16,443 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-05 22:06:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:16,666 INFO L93 Difference]: Finished difference Result 1103 states and 3504 transitions. [2021-06-05 22:06:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:06:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:16,668 INFO L225 Difference]: With dead ends: 1103 [2021-06-05 22:06:16,668 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 22:06:16,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1867.3ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 22:06:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 714. [2021-06-05 22:06:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.4137447405329593) internal successors, (2434), 713 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2434 transitions. [2021-06-05 22:06:16,677 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2434 transitions. Word has length 20 [2021-06-05 22:06:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:16,677 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2434 transitions. [2021-06-05 22:06:16,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2434 transitions. [2021-06-05 22:06:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:16,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:16,678 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:16,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7347,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:16,879 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:16,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1028363162, now seen corresponding path program 51 times [2021-06-05 22:06:16,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:16,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814772557] [2021-06-05 22:06:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:17,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814772557] [2021-06-05 22:06:17,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814772557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173715844] [2021-06-05 22:06:17,092 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 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 22:06:17,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:17,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:06:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:17,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,338 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,344 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:17,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,356 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,363 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,370 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,376 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,377 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,382 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,382 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:17,388 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,393 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,394 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,400 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,401 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,406 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,407 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,413 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,414 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:17,419 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,425 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,426 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,431 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,432 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,437 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,438 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,443 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,444 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,449 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,450 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,455 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:17,456 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,460 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:17,461 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,466 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,467 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,472 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,473 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:17,478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:17,479 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,483 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:17,484 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,714 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 22:06:17,714 INFO L628 ElimStorePlain]: treesize reduction 124, result has 65.7 percent of original size [2021-06-05 22:06:17,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:06:17,716 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 1 variables, input treesize:941, output treesize:237 [2021-06-05 22:06:17,859 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-05 22:06:17,946 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_374, v_prenex_376, ends_with_6, v_prenex_372], 1=[v_prenex_375, ends_with_10, v_prenex_371, v_prenex_373]} [2021-06-05 22:06:17,950 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 6 treesize of output 2 [2021-06-05 22:06:17,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:17,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:17,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,206 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 22:06:18,206 INFO L628 ElimStorePlain]: treesize reduction 147, result has 61.5 percent of original size [2021-06-05 22:06:18,210 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 5 treesize of output 1 [2021-06-05 22:06:18,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,323 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 22:06:18,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:18,327 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 5 treesize of output 1 [2021-06-05 22:06:18,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,436 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 22:06:18,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:18,440 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 6 treesize of output 2 [2021-06-05 22:06:18,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,548 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 22:06:18,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:18,552 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 6 treesize of output 2 [2021-06-05 22:06:18,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,659 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 22:06:18,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:18,662 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 5 treesize of output 1 [2021-06-05 22:06:18,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,768 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 22:06:18,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:18,771 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 4 treesize of output 2 [2021-06-05 22:06:18,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,882 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 22:06:18,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:18,885 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 5 treesize of output 1 [2021-06-05 22:06:18,886 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:18,987 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 22:06:18,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:18,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:06:18,989 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:429, output treesize:195 [2021-06-05 22:06:19,105 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 22:06:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:19,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173715844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:19,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:19,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:06:19,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211019572] [2021-06-05 22:06:19,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:19,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:19,320 INFO L87 Difference]: Start difference. First operand 714 states and 2434 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,749 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 22:06:19,906 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 22:06:20,093 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 22:06:20,263 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 22:06:20,703 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 22:06:20,982 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-05 22:06:21,270 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 22:06:21,605 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-06-05 22:06:21,843 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-05 22:06:21,985 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 22:06:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:21,990 INFO L93 Difference]: Finished difference Result 1278 states and 3953 transitions. [2021-06-05 22:06:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:06:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:21,992 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 22:06:21,992 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 22:06:21,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2943.3ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:06:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 22:06:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 706. [2021-06-05 22:06:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.4184397163120566) internal successors, (2410), 705 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2410 transitions. [2021-06-05 22:06:22,002 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2410 transitions. Word has length 20 [2021-06-05 22:06:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:22,002 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2410 transitions. [2021-06-05 22:06:22,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2410 transitions. [2021-06-05 22:06:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:22,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:22,003 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:22,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7413,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:22,204 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:22,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1118175910, now seen corresponding path program 52 times [2021-06-05 22:06:22,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:22,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318547900] [2021-06-05 22:06:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:22,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318547900] [2021-06-05 22:06:22,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318547900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200073822] [2021-06-05 22:06:22,484 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 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 22:06:22,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:22,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:22,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:06:22,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:23,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200073822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:23,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:23,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:06:23,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210599205] [2021-06-05 22:06:23,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:23,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:23,022 INFO L87 Difference]: Start difference. First operand 706 states and 2410 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:23,769 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 22:06:24,109 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 22:06:24,288 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 22:06:24,708 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 22:06:24,937 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 22:06:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:24,954 INFO L93 Difference]: Finished difference Result 1207 states and 3824 transitions. [2021-06-05 22:06:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:06:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:24,956 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 22:06:24,956 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 22:06:24,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1990.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:06:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 22:06:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 702. [2021-06-05 22:06:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.4151212553495007) internal successors, (2394), 701 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2394 transitions. [2021-06-05 22:06:24,969 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2394 transitions. Word has length 20 [2021-06-05 22:06:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:24,969 INFO L482 AbstractCegarLoop]: Abstraction has 702 states and 2394 transitions. [2021-06-05 22:06:24,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2394 transitions. [2021-06-05 22:06:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:24,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:24,971 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:25,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7458,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:25,185 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1774648740, now seen corresponding path program 53 times [2021-06-05 22:06:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:25,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641401252] [2021-06-05 22:06:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:25,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641401252] [2021-06-05 22:06:25,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641401252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466478424] [2021-06-05 22:06:25,430 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 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 22:06:25,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:25,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:25,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:06:25,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:26,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466478424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:26,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:26,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:06:26,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689884104] [2021-06-05 22:06:26,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:06:26,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:06:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:26,074 INFO L87 Difference]: Start difference. First operand 702 states and 2394 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:06:26,569 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-05 22:06:26,730 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 22:06:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:26,775 INFO L93 Difference]: Finished difference Result 971 states and 3167 transitions. [2021-06-05 22:06:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:26,775 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:06:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:26,776 INFO L225 Difference]: With dead ends: 971 [2021-06-05 22:06:26,776 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 22:06:26,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1102.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 22:06:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 700. [2021-06-05 22:06:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.4148783977110155) internal successors, (2387), 699 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2387 transitions. [2021-06-05 22:06:26,785 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2387 transitions. Word has length 20 [2021-06-05 22:06:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:26,788 INFO L482 AbstractCegarLoop]: Abstraction has 700 states and 2387 transitions. [2021-06-05 22:06:26,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:06:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2387 transitions. [2021-06-05 22:06:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:26,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:26,790 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:27,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7481,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:27,013 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:27,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1692370732, now seen corresponding path program 54 times [2021-06-05 22:06:27,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:27,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228925275] [2021-06-05 22:06:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:27,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228925275] [2021-06-05 22:06:27,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228925275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238660226] [2021-06-05 22:06:27,255 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 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 22:06:27,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:27,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:27,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:06:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238660226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:27,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:06:27,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795507613] [2021-06-05 22:06:27,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:27,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:27,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:27,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:27,689 INFO L87 Difference]: Start difference. First operand 700 states and 2387 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,635 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 22:06:28,953 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 22:06:29,195 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 22:06:29,466 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 22:06:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:29,479 INFO L93 Difference]: Finished difference Result 1111 states and 3555 transitions. [2021-06-05 22:06:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:06:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:29,480 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:06:29,480 INFO L226 Difference]: Without dead ends: 1096 [2021-06-05 22:06:29,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1862.6ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:06:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-06-05 22:06:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 697. [2021-06-05 22:06:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.413793103448276) internal successors, (2376), 696 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2376 transitions. [2021-06-05 22:06:29,489 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2376 transitions. Word has length 20 [2021-06-05 22:06:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:29,489 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2376 transitions. [2021-06-05 22:06:29,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2376 transitions. [2021-06-05 22:06:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:29,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:29,490 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:29,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7500 [2021-06-05 22:06:29,691 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash -200334708, now seen corresponding path program 55 times [2021-06-05 22:06:29,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:29,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838998446] [2021-06-05 22:06:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:30,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838998446] [2021-06-05 22:06:30,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838998446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308893138] [2021-06-05 22:06:30,084 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 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 22:06:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:30,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:06:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:30,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,556 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:30,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,565 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:30,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,573 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:06:30,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,580 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:30,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,586 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:30,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,593 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:30,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,599 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:30,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:30,604 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:30,609 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,614 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:30,615 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,620 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:30,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,626 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:30,627 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,632 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:30,633 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,638 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:30,639 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,644 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:30,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:30,650 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,655 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:30,655 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,661 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:30,661 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,666 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:30,667 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,672 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:30,673 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,678 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:30,679 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,684 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:30,684 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,689 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:30,690 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,695 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:06:30,695 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:30,700 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:30,700 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:30,897 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 22:06:30,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:30,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:06:30,904 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1321, output treesize:438 [2021-06-05 22:06:31,245 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-06-05 22:06:31,437 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 22:06:31,844 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_6], 3=[v_prenex_386, v_prenex_384], 6=[v_prenex_383], 10=[v_prenex_385, ends_with_10, v_prenex_381]} [2021-06-05 22:06:31,855 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 3 treesize of output 1 [2021-06-05 22:06:31,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:31,862 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 5 treesize of output 1 [2021-06-05 22:06:31,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:31,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:31,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,199 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 100 [2021-06-05 22:06:32,200 INFO L628 ElimStorePlain]: treesize reduction 312, result has 50.8 percent of original size [2021-06-05 22:06:32,205 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 6 treesize of output 2 [2021-06-05 22:06:32,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,210 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 6 treesize of output 2 [2021-06-05 22:06:32,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,216 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 6 treesize of output 2 [2021-06-05 22:06:32,217 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,346 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 22:06:32,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:32,351 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 5 treesize of output 1 [2021-06-05 22:06:32,352 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,357 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 3 treesize of output 1 [2021-06-05 22:06:32,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,362 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 5 treesize of output 1 [2021-06-05 22:06:32,363 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,490 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:06:32,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:32,495 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 6 treesize of output 2 [2021-06-05 22:06:32,496 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,620 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 22:06:32,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:32,625 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 5 treesize of output 1 [2021-06-05 22:06:32,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,631 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 6 treesize of output 2 [2021-06-05 22:06:32,632 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,636 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 3 treesize of output 1 [2021-06-05 22:06:32,637 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,757 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:06:32,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:32,761 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 3 treesize of output 1 [2021-06-05 22:06:32,770 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,774 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 5 treesize of output 1 [2021-06-05 22:06:32,775 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:32,979 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 22:06:32,979 INFO L628 ElimStorePlain]: treesize reduction 34, result has 87.1 percent of original size [2021-06-05 22:06:32,983 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 3 treesize of output 1 [2021-06-05 22:06:32,984 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:33,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:33,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 7 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:06:33,086 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:692, output treesize:163 [2021-06-05 22:06:33,335 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 22:06:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:33,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308893138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:33,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:06:33,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526918508] [2021-06-05 22:06:33,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:33,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:33,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:33,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:33,467 INFO L87 Difference]: Start difference. First operand 697 states and 2376 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:34,177 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2021-06-05 22:06:34,631 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-05 22:06:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:34,673 INFO L93 Difference]: Finished difference Result 815 states and 2712 transitions. [2021-06-05 22:06:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:06:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:06:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:34,674 INFO L225 Difference]: With dead ends: 815 [2021-06-05 22:06:34,674 INFO L226 Difference]: Without dead ends: 785 [2021-06-05 22:06:34,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2122.4ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-05 22:06:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 701. [2021-06-05 22:06:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.4171428571428573) internal successors, (2392), 700 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2392 transitions. [2021-06-05 22:06:34,683 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2392 transitions. Word has length 20 [2021-06-05 22:06:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:34,683 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2392 transitions. [2021-06-05 22:06:34,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2392 transitions. [2021-06-05 22:06:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:34,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:34,684 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:34,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7523,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:34,901 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash 984747272, now seen corresponding path program 56 times [2021-06-05 22:06:34,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:34,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862776133] [2021-06-05 22:06:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:35,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862776133] [2021-06-05 22:06:35,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862776133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740960548] [2021-06-05 22:06:35,225 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 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 22:06:35,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:35,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:35,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:06:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:35,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,527 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,534 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,540 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,546 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:35,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,553 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,559 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:35,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,566 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,572 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:35,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,578 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:35,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,583 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:35,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,589 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,594 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,595 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,600 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:35,601 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,605 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,606 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,610 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:35,611 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:35,615 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:35,619 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,624 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,624 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:35,628 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,632 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:35,633 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:35,637 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,641 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,641 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,645 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,646 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,649 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:35,650 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,773 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 22:06:35,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:35,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:06:35,776 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:957, output treesize:261 [2021-06-05 22:06:35,917 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 22:06:36,237 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_389, v_prenex_390], 3=[v_prenex_388, v_prenex_387, ends_with_6, v_prenex_391], 6=[ends_with_10]} [2021-06-05 22:06:36,242 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 5 treesize of output 1 [2021-06-05 22:06:36,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:36,249 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 3 treesize of output 1 [2021-06-05 22:06:36,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:36,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:36,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:36,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:36,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:36,775 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 100 [2021-06-05 22:06:36,775 INFO L628 ElimStorePlain]: treesize reduction 540, result has 44.1 percent of original size [2021-06-05 22:06:36,780 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 4 treesize of output 2 [2021-06-05 22:06:36,781 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:36,786 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 4 treesize of output 2 [2021-06-05 22:06:36,786 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:36,994 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:06:36,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:37,000 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 5 treesize of output 1 [2021-06-05 22:06:37,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,005 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 3 treesize of output 1 [2021-06-05 22:06:37,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,348 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-06-05 22:06:37,349 INFO L628 ElimStorePlain]: treesize reduction 75, result has 81.7 percent of original size [2021-06-05 22:06:37,349 INFO L518 ElimStorePlain]: Eliminatee v_prenex_387 vanished before elimination [2021-06-05 22:06:37,353 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 6 treesize of output 2 [2021-06-05 22:06:37,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,357 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 6 treesize of output 2 [2021-06-05 22:06:37,358 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,362 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 6 treesize of output 2 [2021-06-05 22:06:37,363 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,367 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 4 treesize of output 2 [2021-06-05 22:06:37,368 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,371 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 6 treesize of output 2 [2021-06-05 22:06:37,372 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,521 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 22:06:37,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:37,525 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 5 treesize of output 1 [2021-06-05 22:06:37,526 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,529 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 5 treesize of output 1 [2021-06-05 22:06:37,530 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,672 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 22:06:37,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:37,676 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 6 treesize of output 2 [2021-06-05 22:06:37,677 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,681 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 5 treesize of output 1 [2021-06-05 22:06:37,682 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,686 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 4 treesize of output 2 [2021-06-05 22:06:37,687 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,691 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 4 treesize of output 2 [2021-06-05 22:06:37,692 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,695 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 5 treesize of output 1 [2021-06-05 22:06:37,696 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:37,828 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 22:06:37,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:37,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 7 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 22:06:37,832 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:1059, output treesize:253 [2021-06-05 22:06:38,077 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 22:06:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:38,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740960548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:38,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:38,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:06:38,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973789981] [2021-06-05 22:06:38,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:38,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:38,333 INFO L87 Difference]: Start difference. First operand 701 states and 2392 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:39,013 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 22:06:39,291 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 22:06:39,667 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-06-05 22:06:39,889 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 22:06:40,136 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-05 22:06:40,376 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-06-05 22:06:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:40,402 INFO L93 Difference]: Finished difference Result 1198 states and 3702 transitions. [2021-06-05 22:06:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:06:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:40,405 INFO L225 Difference]: With dead ends: 1198 [2021-06-05 22:06:40,405 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 22:06:40,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2546.7ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:06:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 22:06:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 703. [2021-06-05 22:06:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.4415954415954415) internal successors, (2416), 702 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2416 transitions. [2021-06-05 22:06:40,419 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2416 transitions. Word has length 20 [2021-06-05 22:06:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:40,419 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2416 transitions. [2021-06-05 22:06:40,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2416 transitions. [2021-06-05 22:06:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:40,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:40,420 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:40,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7672 [2021-06-05 22:06:40,637 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:40,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1048957180, now seen corresponding path program 57 times [2021-06-05 22:06:40,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:40,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751517910] [2021-06-05 22:06:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:41,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:41,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751517910] [2021-06-05 22:06:41,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751517910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:41,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732880115] [2021-06-05 22:06:41,029 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 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 22:06:41,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:41,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:06:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:41,554 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_397, ends_with_2], 15=[v_prenex_395]} [2021-06-05 22:06:41,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:41,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:41,563 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:41,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:41,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:41,571 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:41,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:41,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:41,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:41,578 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:41,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:41,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:41,586 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:06:41,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,039 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 107 [2021-06-05 22:06:42,040 INFO L628 ElimStorePlain]: treesize reduction 366, result has 52.2 percent of original size [2021-06-05 22:06:42,045 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 5 treesize of output 1 [2021-06-05 22:06:42,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,050 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 3 treesize of output 1 [2021-06-05 22:06:42,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,252 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:06:42,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:42,257 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 6 treesize of output 2 [2021-06-05 22:06:42,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,263 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 6 treesize of output 2 [2021-06-05 22:06:42,264 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,269 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 6 treesize of output 2 [2021-06-05 22:06:42,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,274 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 4 treesize of output 2 [2021-06-05 22:06:42,275 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,459 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:06:42,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:42,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-06-05 22:06:42,471 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:885, output treesize:369 [2021-06-05 22:06:42,666 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 22:06:43,000 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2021-06-05 22:06:44,496 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_410, v_prenex_412, v_prenex_411, ends_with_10, v_prenex_403, ends_with_6, v_prenex_405, v_prenex_404, v_prenex_407, v_prenex_406, v_prenex_409, v_prenex_408], 15=[v_prenex_413], 21=[v_prenex_415]} [2021-06-05 22:06:44,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:44,508 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:06:44,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:44,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:44,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,039 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 114 [2021-06-05 22:06:45,039 INFO L628 ElimStorePlain]: treesize reduction 1292, result has 19.7 percent of original size [2021-06-05 22:06:45,044 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 3 treesize of output 1 [2021-06-05 22:06:45,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,182 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 22:06:45,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:45,188 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 3 treesize of output 1 [2021-06-05 22:06:45,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,324 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 22:06:45,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:45,324 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:06:45,324 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 22:06:45,324 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:06:45,330 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 6 treesize of output 2 [2021-06-05 22:06:45,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,464 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:06:45,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:45,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_404 vanished before elimination [2021-06-05 22:06:45,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-06-05 22:06:45,469 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 3 treesize of output 1 [2021-06-05 22:06:45,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,601 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:06:45,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:45,606 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 5 treesize of output 1 [2021-06-05 22:06:45,607 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,736 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 22:06:45,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:45,736 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-06-05 22:06:45,741 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 5 treesize of output 1 [2021-06-05 22:06:45,742 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,746 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 6 treesize of output 2 [2021-06-05 22:06:45,747 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,751 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 3 treesize of output 1 [2021-06-05 22:06:45,752 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,756 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 4 treesize of output 2 [2021-06-05 22:06:45,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,875 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:06:45,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:45,880 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 4 treesize of output 2 [2021-06-05 22:06:45,881 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,885 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 6 treesize of output 2 [2021-06-05 22:06:45,886 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,890 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 6 treesize of output 2 [2021-06-05 22:06:45,891 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,895 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 4 treesize of output 2 [2021-06-05 22:06:45,896 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,005 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 22:06:46,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:46,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 14 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:06:46,008 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 25 variables, input treesize:1669, output treesize:200 [2021-06-05 22:06:46,177 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 22:06:46,315 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 22:06:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:46,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732880115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:46,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:06:46,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63675870] [2021-06-05 22:06:46,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:46,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:46,384 INFO L87 Difference]: Start difference. First operand 703 states and 2416 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:46,999 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 106 [2021-06-05 22:06:47,408 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 22:06:47,627 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 22:06:47,825 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-06-05 22:06:48,019 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 22:06:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:48,036 INFO L93 Difference]: Finished difference Result 912 states and 2961 transitions. [2021-06-05 22:06:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:06:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:06:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:48,038 INFO L225 Difference]: With dead ends: 912 [2021-06-05 22:06:48,038 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 22:06:48,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2514.9ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 22:06:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 712. [2021-06-05 22:06:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.4430379746835444) internal successors, (2448), 711 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2448 transitions. [2021-06-05 22:06:48,048 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2448 transitions. Word has length 20 [2021-06-05 22:06:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:48,049 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2448 transitions. [2021-06-05 22:06:48,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2448 transitions. [2021-06-05 22:06:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:48,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:48,050 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:48,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7783 [2021-06-05 22:06:48,250 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:48,251 INFO L82 PathProgramCache]: Analyzing trace with hash 136124800, now seen corresponding path program 58 times [2021-06-05 22:06:48,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:48,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244262077] [2021-06-05 22:06:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:48,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:48,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244262077] [2021-06-05 22:06:48,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244262077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:48,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101546610] [2021-06-05 22:06:48,553 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 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 22:06:48,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:48,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:06:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:48,857 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 22:06:49,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,219 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:49,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,227 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:06:49,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:49,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,234 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:49,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:49,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,242 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:06:49,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:49,249 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:49,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:49,828 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 106 [2021-06-05 22:06:49,829 INFO L628 ElimStorePlain]: treesize reduction 446, result has 53.3 percent of original size [2021-06-05 22:06:49,834 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 4 treesize of output 2 [2021-06-05 22:06:49,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:49,840 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 4 treesize of output 2 [2021-06-05 22:06:49,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:49,845 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 4 treesize of output 2 [2021-06-05 22:06:49,846 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:50,094 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 22:06:50,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:50,099 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 6 treesize of output 2 [2021-06-05 22:06:50,100 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:50,105 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 6 treesize of output 2 [2021-06-05 22:06:50,106 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:50,110 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 4 treesize of output 2 [2021-06-05 22:06:50,111 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:50,354 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 22:06:50,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:50,359 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 5 treesize of output 1 [2021-06-05 22:06:50,360 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:50,365 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 5 treesize of output 1 [2021-06-05 22:06:50,366 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:50,604 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 22:06:50,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:50,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:06:50,617 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:1131, output treesize:471 [2021-06-05 22:06:50,989 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 134 [2021-06-05 22:06:52,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:52,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:52,986 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:06:52,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:52,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:52,999 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:53,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:53,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:53,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:53,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:53,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:53,025 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:06:53,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:53,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:53,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:53,891 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 158 [2021-06-05 22:06:53,892 INFO L628 ElimStorePlain]: treesize reduction 1763, result has 22.7 percent of original size [2021-06-05 22:06:53,899 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 4 treesize of output 2 [2021-06-05 22:06:53,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:53,907 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 6 treesize of output 2 [2021-06-05 22:06:53,907 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:54,156 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 22:06:54,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:54,164 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 5 treesize of output 1 [2021-06-05 22:06:54,165 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:54,404 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-06-05 22:06:54,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:54,411 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 5 treesize of output 1 [2021-06-05 22:06:54,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:54,650 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 22:06:54,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:54,657 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 3 treesize of output 1 [2021-06-05 22:06:54,658 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:54,895 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 22:06:54,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:54,902 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 3 treesize of output 1 [2021-06-05 22:06:54,903 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:55,136 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-05 22:06:55,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:55,143 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 6 treesize of output 2 [2021-06-05 22:06:55,144 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:55,381 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 22:06:55,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:55,388 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 3 treesize of output 1 [2021-06-05 22:06:55,389 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:55,620 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 22:06:55,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:55,627 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 5 treesize of output 1 [2021-06-05 22:06:55,627 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:55,856 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 22:06:55,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:55,862 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 5 treesize of output 1 [2021-06-05 22:06:55,863 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,095 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 22:06:56,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:56,101 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 3 treesize of output 1 [2021-06-05 22:06:56,102 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,324 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 22:06:56,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:56,330 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 6 treesize of output 2 [2021-06-05 22:06:56,331 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,554 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:06:56,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:56,561 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 6 treesize of output 2 [2021-06-05 22:06:56,562 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,568 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 6 treesize of output 2 [2021-06-05 22:06:56,569 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,786 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:06:56,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:56,792 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 4 treesize of output 2 [2021-06-05 22:06:56,793 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:57,006 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 22:06:57,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:57,012 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 4 treesize of output 2 [2021-06-05 22:06:57,013 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:57,223 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 22:06:57,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:57,230 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 6 treesize of output 2 [2021-06-05 22:06:57,230 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:57,236 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 6 treesize of output 2 [2021-06-05 22:06:57,237 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:57,439 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 22:06:57,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:57,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 16 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:06:57,449 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 25 variables, input treesize:2477, output treesize:339 [2021-06-05 22:06:57,726 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 22:06:57,925 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-06-05 22:06:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:58,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101546610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:58,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:58,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:06:58,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694868063] [2021-06-05 22:06:58,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:58,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:58,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:58,132 INFO L87 Difference]: Start difference. First operand 712 states and 2448 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:06:58,715 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-05 22:06:59,019 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 22:06:59,314 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-06-05 22:06:59,574 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2021-06-05 22:06:59,857 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-06-05 22:07:00,137 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-06-05 22:07:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:00,161 INFO L93 Difference]: Finished difference Result 980 states and 3163 transitions. [2021-06-05 22:07:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:07:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:07:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:00,162 INFO L225 Difference]: With dead ends: 980 [2021-06-05 22:07:00,162 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 22:07:00,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2915.4ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:07:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 22:07:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 708. [2021-06-05 22:07:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.43988684582744) internal successors, (2432), 707 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2432 transitions. [2021-06-05 22:07:00,171 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2432 transitions. Word has length 20 [2021-06-05 22:07:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:00,171 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2432 transitions. [2021-06-05 22:07:00,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:07:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2432 transitions. [2021-06-05 22:07:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:00,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:00,172 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:00,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8051 [2021-06-05 22:07:00,373 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:00,373 INFO L82 PathProgramCache]: Analyzing trace with hash -821811394, now seen corresponding path program 59 times [2021-06-05 22:07:00,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:00,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078884620] [2021-06-05 22:07:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:00,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078884620] [2021-06-05 22:07:00,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078884620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710497272] [2021-06-05 22:07:00,638 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 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 22:07:00,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:07:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:01,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710497272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:01,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:01,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:07:01,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903731641] [2021-06-05 22:07:01,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:07:01,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:01,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:07:01,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:01,108 INFO L87 Difference]: Start difference. First operand 708 states and 2432 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:07:01,583 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-06-05 22:07:01,783 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 22:07:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:01,825 INFO L93 Difference]: Finished difference Result 772 states and 2609 transitions. [2021-06-05 22:07:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:07:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:01,827 INFO L225 Difference]: With dead ends: 772 [2021-06-05 22:07:01,827 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 22:07:01,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1016.3ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 22:07:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 706. [2021-06-05 22:07:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.4397163120567376) internal successors, (2425), 705 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2425 transitions. [2021-06-05 22:07:01,834 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2425 transitions. Word has length 20 [2021-06-05 22:07:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:01,834 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2425 transitions. [2021-06-05 22:07:01,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:07:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2425 transitions. [2021-06-05 22:07:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:01,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:01,836 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:02,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8770,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:02,036 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash -100687916, now seen corresponding path program 60 times [2021-06-05 22:07:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:02,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699415006] [2021-06-05 22:07:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:02,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:02,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699415006] [2021-06-05 22:07:02,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699415006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:02,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59237522] [2021-06-05 22:07:02,352 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 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 22:07:02,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:02,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:07:02,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:02,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:02,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,852 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:02,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,858 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:02,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,862 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 4 treesize of output 2 [2021-06-05 22:07:02,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:02,867 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,872 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:02,873 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,877 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:02,878 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,882 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:02,883 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,887 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 6 treesize of output 2 [2021-06-05 22:07:02,888 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:02,892 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,896 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:02,897 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,901 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:02,902 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,907 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:07:02,908 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,913 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:07:02,913 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:02,917 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:02,921 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:02,926 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:07:02,927 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:02,930 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:02,934 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:02,937 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 3 treesize of output 1 [2021-06-05 22:07:02,938 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,189 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 22:07:03,190 INFO L628 ElimStorePlain]: treesize reduction 156, result has 64.9 percent of original size [2021-06-05 22:07:03,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-06-05 22:07:03,194 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:1011, output treesize:283 [2021-06-05 22:07:03,410 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 22:07:04,617 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_447], 6=[ends_with_2], 10=[v_prenex_449], 21=[ends_with_6]} [2021-06-05 22:07:04,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:04,627 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:07:04,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:04,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:04,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:04,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:04,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:04,649 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:04,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:04,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:04,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:04,661 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:04,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:04,671 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 3 treesize of output 1 [2021-06-05 22:07:04,672 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:04,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:04,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:04,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:04,691 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,399 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 120 [2021-06-05 22:07:05,400 INFO L628 ElimStorePlain]: treesize reduction 699, result has 48.6 percent of original size [2021-06-05 22:07:05,406 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 5 treesize of output 1 [2021-06-05 22:07:05,406 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,412 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 4 treesize of output 2 [2021-06-05 22:07:05,413 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,418 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 6 treesize of output 2 [2021-06-05 22:07:05,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,424 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 4 treesize of output 2 [2021-06-05 22:07:05,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,430 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 5 treesize of output 1 [2021-06-05 22:07:05,431 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,436 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 6 treesize of output 2 [2021-06-05 22:07:05,437 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,442 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 4 treesize of output 2 [2021-06-05 22:07:05,443 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,449 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 4 treesize of output 2 [2021-06-05 22:07:05,450 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,455 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 4 treesize of output 2 [2021-06-05 22:07:05,456 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,462 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 4 treesize of output 2 [2021-06-05 22:07:05,463 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,469 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 4 treesize of output 2 [2021-06-05 22:07:05,470 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,475 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 4 treesize of output 2 [2021-06-05 22:07:05,476 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,481 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 4 treesize of output 2 [2021-06-05 22:07:05,482 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,488 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 4 treesize of output 2 [2021-06-05 22:07:05,489 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,494 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 5 treesize of output 1 [2021-06-05 22:07:05,495 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,774 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 22:07:05,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:05,779 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 3 treesize of output 1 [2021-06-05 22:07:05,780 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,784 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 3 treesize of output 1 [2021-06-05 22:07:05,785 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,046 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 22:07:06,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:06,052 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 6 treesize of output 2 [2021-06-05 22:07:06,053 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,059 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 4 treesize of output 2 [2021-06-05 22:07:06,060 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,065 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 4 treesize of output 2 [2021-06-05 22:07:06,066 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,071 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 6 treesize of output 2 [2021-06-05 22:07:06,071 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,076 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 4 treesize of output 2 [2021-06-05 22:07:06,077 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,082 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 5 treesize of output 1 [2021-06-05 22:07:06,082 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,087 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 6 treesize of output 2 [2021-06-05 22:07:06,088 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,093 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 6 treesize of output 2 [2021-06-05 22:07:06,094 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,099 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 4 treesize of output 2 [2021-06-05 22:07:06,100 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,104 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 5 treesize of output 1 [2021-06-05 22:07:06,105 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,110 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 4 treesize of output 2 [2021-06-05 22:07:06,111 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,116 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 6 treesize of output 2 [2021-06-05 22:07:06,116 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,124 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 4 treesize of output 2 [2021-06-05 22:07:06,126 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,131 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 6 treesize of output 2 [2021-06-05 22:07:06,132 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,137 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 4 treesize of output 2 [2021-06-05 22:07:06,138 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:06,542 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-06-05 22:07:06,542 INFO L628 ElimStorePlain]: treesize reduction 57, result has 88.9 percent of original size [2021-06-05 22:07:06,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 4 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 22:07:06,548 INFO L247 ElimStorePlain]: Needed 40 recursive calls to eliminate 11 variables, input treesize:1575, output treesize:355 [2021-06-05 22:07:06,818 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 22:07:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:07,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59237522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:07,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:07,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:07:07,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807086840] [2021-06-05 22:07:07,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:07:07,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:07:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:07,044 INFO L87 Difference]: Start difference. First operand 706 states and 2425 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,685 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-06-05 22:07:07,938 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-06-05 22:07:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:07,967 INFO L93 Difference]: Finished difference Result 889 states and 2954 transitions. [2021-06-05 22:07:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:07,968 INFO L225 Difference]: With dead ends: 889 [2021-06-05 22:07:07,968 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 22:07:07,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1634.6ms TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 22:07:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 704. [2021-06-05 22:07:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.4423897581792318) internal successors, (2420), 703 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2420 transitions. [2021-06-05 22:07:07,977 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2420 transitions. Word has length 20 [2021-06-05 22:07:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:07,977 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2420 transitions. [2021-06-05 22:07:07,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2420 transitions. [2021-06-05 22:07:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:07,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:07,978 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:08,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8794 [2021-06-05 22:07:08,182 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash 206234836, now seen corresponding path program 61 times [2021-06-05 22:07:08,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:08,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469304737] [2021-06-05 22:07:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:08,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:08,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469304737] [2021-06-05 22:07:08,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469304737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907208037] [2021-06-05 22:07:08,421 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 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 22:07:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:07:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:08,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:08,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:08,874 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:08,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:08,881 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 4 treesize of output 2 [2021-06-05 22:07:08,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:08,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:08,889 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:07:08,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:08,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:08,896 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:08,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:09,461 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 121 [2021-06-05 22:07:09,462 INFO L628 ElimStorePlain]: treesize reduction 316, result has 62.8 percent of original size [2021-06-05 22:07:09,467 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 5 treesize of output 1 [2021-06-05 22:07:09,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:09,473 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 3 treesize of output 1 [2021-06-05 22:07:09,474 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:09,718 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 22:07:09,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:09,723 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 3 treesize of output 1 [2021-06-05 22:07:09,724 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:09,729 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 3 treesize of output 1 [2021-06-05 22:07:09,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:09,969 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 22:07:09,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:09,975 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 6 treesize of output 2 [2021-06-05 22:07:09,975 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:09,980 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 6 treesize of output 2 [2021-06-05 22:07:09,981 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:09,986 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 4 treesize of output 2 [2021-06-05 22:07:09,987 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:10,218 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 22:07:10,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:10,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:07:10,232 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:925, output treesize:503 [2021-06-05 22:07:10,589 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 140 [2021-06-05 22:07:13,013 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_474, v_prenex_462, v_prenex_470, v_prenex_461], 3=[ends_with_2, ends_with_6, v_prenex_463, v_prenex_473, v_prenex_465, v_prenex_476, v_prenex_464, v_prenex_475, v_prenex_467, v_prenex_466, v_prenex_469, v_prenex_468, v_prenex_472, v_prenex_471], 21=[v_prenex_484], 28=[v_prenex_482]} [2021-06-05 22:07:13,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:13,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,156 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 343 DAG size of output: 172 [2021-06-05 22:07:14,156 INFO L628 ElimStorePlain]: treesize reduction 1771, result has 28.4 percent of original size [2021-06-05 22:07:14,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_462 vanished before elimination [2021-06-05 22:07:14,164 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 6 treesize of output 2 [2021-06-05 22:07:14,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,502 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 22:07:14,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:14,509 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 3 treesize of output 1 [2021-06-05 22:07:14,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,843 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 22:07:14,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:14,850 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 5 treesize of output 1 [2021-06-05 22:07:14,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:15,182 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-06-05 22:07:15,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:15,189 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 6 treesize of output 2 [2021-06-05 22:07:15,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:15,517 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-05 22:07:15,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:15,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_463 vanished before elimination [2021-06-05 22:07:15,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_473 vanished before elimination [2021-06-05 22:07:15,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_465 vanished before elimination [2021-06-05 22:07:15,524 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 4 treesize of output 2 [2021-06-05 22:07:15,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:15,857 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 22:07:15,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:15,857 INFO L518 ElimStorePlain]: Eliminatee v_prenex_464 vanished before elimination [2021-06-05 22:07:15,864 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 5 treesize of output 1 [2021-06-05 22:07:15,865 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,184 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 22:07:16,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:16,190 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 3 treesize of output 1 [2021-06-05 22:07:16,191 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,507 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-05 22:07:16,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:16,507 INFO L518 ElimStorePlain]: Eliminatee v_prenex_466 vanished before elimination [2021-06-05 22:07:16,514 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 3 treesize of output 1 [2021-06-05 22:07:16,515 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,521 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 5 treesize of output 1 [2021-06-05 22:07:16,522 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,842 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-06-05 22:07:16,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:16,848 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 3 treesize of output 1 [2021-06-05 22:07:16,849 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,160 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 22:07:17,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:17,160 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-06-05 22:07:17,160 INFO L518 ElimStorePlain]: Eliminatee v_prenex_471 vanished before elimination [2021-06-05 22:07:17,167 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 3 treesize of output 1 [2021-06-05 22:07:17,168 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,175 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 4 treesize of output 2 [2021-06-05 22:07:17,176 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,182 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 4 treesize of output 2 [2021-06-05 22:07:17,183 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,190 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 4 treesize of output 2 [2021-06-05 22:07:17,192 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,198 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 4 treesize of output 2 [2021-06-05 22:07:17,199 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,206 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 5 treesize of output 1 [2021-06-05 22:07:17,207 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,213 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 6 treesize of output 2 [2021-06-05 22:07:17,214 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,221 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 6 treesize of output 2 [2021-06-05 22:07:17,222 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,777 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 139 [2021-06-05 22:07:17,778 INFO L628 ElimStorePlain]: treesize reduction 51, result has 91.8 percent of original size [2021-06-05 22:07:17,784 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 4 treesize of output 2 [2021-06-05 22:07:17,785 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,792 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 4 treesize of output 2 [2021-06-05 22:07:17,793 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,799 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 4 treesize of output 2 [2021-06-05 22:07:17,800 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,806 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 6 treesize of output 2 [2021-06-05 22:07:17,807 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,813 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 6 treesize of output 2 [2021-06-05 22:07:17,814 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,820 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 6 treesize of output 2 [2021-06-05 22:07:17,821 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:17,827 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 4 treesize of output 2 [2021-06-05 22:07:17,828 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:18,082 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 22:07:18,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:18,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 20 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 22:07:18,090 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 37 variables, input treesize:2532, output treesize:451 [2021-06-05 22:07:18,372 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-06-05 22:07:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:18,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907208037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:18,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:07:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373202520] [2021-06-05 22:07:18,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:18,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:18,667 INFO L87 Difference]: Start difference. First operand 704 states and 2420 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:07:19,301 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 22:07:19,569 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-06-05 22:07:19,850 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-06-05 22:07:20,210 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 22:07:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:20,244 INFO L93 Difference]: Finished difference Result 869 states and 2876 transitions. [2021-06-05 22:07:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:07:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:07:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:20,245 INFO L225 Difference]: With dead ends: 869 [2021-06-05 22:07:20,245 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 22:07:20,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2376.9ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 22:07:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 703. [2021-06-05 22:07:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.4415954415954415) internal successors, (2416), 702 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2416 transitions. [2021-06-05 22:07:20,253 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2416 transitions. Word has length 20 [2021-06-05 22:07:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:20,253 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2416 transitions. [2021-06-05 22:07:20,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:07:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2416 transitions. [2021-06-05 22:07:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:20,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:20,254 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:20,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9185 [2021-06-05 22:07:20,455 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:20,455 INFO L82 PathProgramCache]: Analyzing trace with hash 623244032, now seen corresponding path program 62 times [2021-06-05 22:07:20,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:20,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316844555] [2021-06-05 22:07:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:20,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:20,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316844555] [2021-06-05 22:07:20,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316844555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:20,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311466860] [2021-06-05 22:07:20,677 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 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 22:07:20,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:20,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:07:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:20,958 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 5 treesize of output 1 [2021-06-05 22:07:20,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,963 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 5 treesize of output 1 [2021-06-05 22:07:20,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,969 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 6 treesize of output 2 [2021-06-05 22:07:20,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,974 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 5 treesize of output 1 [2021-06-05 22:07:20,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,979 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 3 treesize of output 1 [2021-06-05 22:07:20,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,985 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 6 treesize of output 2 [2021-06-05 22:07:20,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:20,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,994 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 6 treesize of output 2 [2021-06-05 22:07:20,995 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:20,999 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 6 treesize of output 2 [2021-06-05 22:07:21,000 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:21,005 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:07:21,010 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,014 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 6 treesize of output 2 [2021-06-05 22:07:21,015 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,019 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 6 treesize of output 2 [2021-06-05 22:07:21,020 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:21,024 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,311 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-06-05 22:07:21,311 INFO L628 ElimStorePlain]: treesize reduction 70, result has 82.1 percent of original size [2021-06-05 22:07:21,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-06-05 22:07:21,315 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:578, output treesize:322 [2021-06-05 22:07:21,600 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-05 22:07:23,014 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, v_prenex_515, v_prenex_514, v_prenex_517, v_prenex_516, v_prenex_489, v_prenex_500, v_prenex_488, v_prenex_524, v_prenex_502, v_prenex_523, v_prenex_501, ends_with_2, v_prenex_504, v_prenex_526, v_prenex_503, v_prenex_506, v_prenex_505, v_prenex_508, v_prenex_507, v_prenex_509, v_prenex_496, v_prenex_495, v_prenex_498, v_prenex_497, v_prenex_511, v_prenex_499, v_prenex_510, v_prenex_512, v_prenex_490, v_prenex_492, v_prenex_491, v_prenex_494, v_prenex_493], 15=[v_prenex_520], 21=[v_prenex_521]} [2021-06-05 22:07:23,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:23,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:23,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,517 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 107 [2021-06-05 22:07:23,517 INFO L628 ElimStorePlain]: treesize reduction 1062, result has 23.4 percent of original size [2021-06-05 22:07:23,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_515 vanished before elimination [2021-06-05 22:07:23,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_514 vanished before elimination [2021-06-05 22:07:23,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_517 vanished before elimination [2021-06-05 22:07:23,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-05 22:07:23,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_489 vanished before elimination [2021-06-05 22:07:23,518 INFO L518 ElimStorePlain]: Eliminatee v_prenex_500 vanished before elimination [2021-06-05 22:07:23,518 INFO L518 ElimStorePlain]: Eliminatee v_prenex_488 vanished before elimination [2021-06-05 22:07:23,523 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 4 treesize of output 2 [2021-06-05 22:07:23,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,672 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:07:23,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:23,672 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-06-05 22:07:23,677 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 4 treesize of output 2 [2021-06-05 22:07:23,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,815 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 22:07:23,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:23,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-06-05 22:07:23,815 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 22:07:23,820 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 3 treesize of output 1 [2021-06-05 22:07:23,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,954 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 22:07:23,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:23,954 INFO L518 ElimStorePlain]: Eliminatee v_prenex_526 vanished before elimination [2021-06-05 22:07:23,954 INFO L518 ElimStorePlain]: Eliminatee v_prenex_503 vanished before elimination [2021-06-05 22:07:23,959 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 5 treesize of output 1 [2021-06-05 22:07:23,960 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:24,196 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-05 22:07:24,197 INFO L628 ElimStorePlain]: treesize reduction 34, result has 89.0 percent of original size [2021-06-05 22:07:24,201 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 3 treesize of output 1 [2021-06-05 22:07:24,202 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:24,317 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 22:07:24,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:24,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_508 vanished before elimination [2021-06-05 22:07:24,323 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 6 treesize of output 2 [2021-06-05 22:07:24,324 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:24,547 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 22:07:24,547 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 22:07:24,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_509 vanished before elimination [2021-06-05 22:07:24,552 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 4 treesize of output 2 [2021-06-05 22:07:24,553 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:24,665 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 22:07:24,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:24,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_495 vanished before elimination [2021-06-05 22:07:24,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_498 vanished before elimination [2021-06-05 22:07:24,670 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 5 treesize of output 1 [2021-06-05 22:07:24,671 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:24,802 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 22:07:24,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:24,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_511 vanished before elimination [2021-06-05 22:07:24,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-06-05 22:07:24,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-06-05 22:07:24,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_512 vanished before elimination [2021-06-05 22:07:24,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_490 vanished before elimination [2021-06-05 22:07:24,807 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 6 treesize of output 2 [2021-06-05 22:07:24,808 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:24,916 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:07:24,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:24,921 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 6 treesize of output 2 [2021-06-05 22:07:24,922 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,029 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 22:07:25,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:25,030 INFO L518 ElimStorePlain]: Eliminatee v_prenex_494 vanished before elimination [2021-06-05 22:07:25,030 INFO L518 ElimStorePlain]: Eliminatee v_prenex_493 vanished before elimination [2021-06-05 22:07:25,034 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 6 treesize of output 2 [2021-06-05 22:07:25,035 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,038 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 6 treesize of output 2 [2021-06-05 22:07:25,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,140 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 22:07:25,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:25,144 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 5 treesize of output 1 [2021-06-05 22:07:25,145 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,149 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 5 treesize of output 1 [2021-06-05 22:07:25,149 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:25,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 36 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:07:25,250 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 43 variables, input treesize:1480, output treesize:202 [2021-06-05 22:07:25,424 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 22:07:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:25,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311466860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:25,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:07:25,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438123337] [2021-06-05 22:07:25,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:07:25,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:07:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:25,691 INFO L87 Difference]: Start difference. First operand 703 states and 2416 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,250 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-05 22:07:26,558 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 22:07:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:26,561 INFO L93 Difference]: Finished difference Result 841 states and 2802 transitions. [2021-06-05 22:07:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:26,562 INFO L225 Difference]: With dead ends: 841 [2021-06-05 22:07:26,562 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 22:07:26,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1532.1ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 22:07:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 709. [2021-06-05 22:07:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 3.4420903954802258) internal successors, (2437), 708 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 2437 transitions. [2021-06-05 22:07:26,570 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 2437 transitions. Word has length 20 [2021-06-05 22:07:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:26,570 INFO L482 AbstractCegarLoop]: Abstraction has 709 states and 2437 transitions. [2021-06-05 22:07:26,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 2437 transitions. [2021-06-05 22:07:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:26,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:26,571 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:26,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9500 [2021-06-05 22:07:26,772 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash -888775412, now seen corresponding path program 63 times [2021-06-05 22:07:26,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:26,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029174012] [2021-06-05 22:07:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:27,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:27,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029174012] [2021-06-05 22:07:27,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029174012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:27,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940301088] [2021-06-05 22:07:27,146 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 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 22:07:27,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:07:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:27,387 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 5 treesize of output 1 [2021-06-05 22:07:27,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,393 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 6 treesize of output 2 [2021-06-05 22:07:27,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:27,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,402 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 6 treesize of output 2 [2021-06-05 22:07:27,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,408 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 6 treesize of output 2 [2021-06-05 22:07:27,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,413 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 6 treesize of output 2 [2021-06-05 22:07:27,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,418 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 3 treesize of output 1 [2021-06-05 22:07:27,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,424 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 5 treesize of output 1 [2021-06-05 22:07:27,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,429 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 5 treesize of output 1 [2021-06-05 22:07:27,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,434 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 4 treesize of output 2 [2021-06-05 22:07:27,435 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:27,626 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 22:07:27,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:27,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-06-05 22:07:27,631 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:520, output treesize:416 [2021-06-05 22:07:27,990 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2021-06-05 22:07:28,161 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:07:29,252 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_537, v_prenex_536, v_prenex_528, v_prenex_539, v_prenex_538, v_prenex_529, v_prenex_540, v_prenex_531, v_prenex_530, v_prenex_533, v_prenex_544, v_prenex_532, v_prenex_543, v_prenex_535, v_prenex_534], 10=[ends_with_2, ends_with_10], 15=[v_prenex_541]} [2021-06-05 22:07:29,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:29,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:29,261 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:29,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:29,270 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 22:07:29,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:29,649 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 96 [2021-06-05 22:07:29,650 INFO L628 ElimStorePlain]: treesize reduction 895, result has 23.2 percent of original size [2021-06-05 22:07:29,655 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 5 treesize of output 1 [2021-06-05 22:07:29,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:29,766 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:07:29,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:29,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-06-05 22:07:29,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_539 vanished before elimination [2021-06-05 22:07:29,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_538 vanished before elimination [2021-06-05 22:07:29,771 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 5 treesize of output 1 [2021-06-05 22:07:29,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:29,881 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 22:07:29,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:29,886 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 3 treesize of output 1 [2021-06-05 22:07:29,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:29,995 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:07:29,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:29,995 INFO L518 ElimStorePlain]: Eliminatee v_prenex_531 vanished before elimination [2021-06-05 22:07:30,000 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 6 treesize of output 2 [2021-06-05 22:07:30,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,108 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 22:07:30,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:30,113 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 5 treesize of output 1 [2021-06-05 22:07:30,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,218 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 22:07:30,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:30,222 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 3 treesize of output 1 [2021-06-05 22:07:30,223 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,325 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 22:07:30,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:30,330 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 3 treesize of output 1 [2021-06-05 22:07:30,331 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,497 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-05 22:07:30,498 INFO L628 ElimStorePlain]: treesize reduction 38, result has 84.2 percent of original size [2021-06-05 22:07:30,502 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 3 treesize of output 1 [2021-06-05 22:07:30,503 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:30,581 INFO L518 ElimStorePlain]: Eliminatee v_prenex_535 vanished before elimination [2021-06-05 22:07:30,581 INFO L518 ElimStorePlain]: Eliminatee v_prenex_534 vanished before elimination [2021-06-05 22:07:30,585 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 6 treesize of output 2 [2021-06-05 22:07:30,586 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:30,666 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 4 treesize of output 2 [2021-06-05 22:07:30,667 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:30,745 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 5 treesize of output 1 [2021-06-05 22:07:30,746 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,749 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 3 treesize of output 1 [2021-06-05 22:07:30,750 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:30,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:30,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 18 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:07:30,822 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 22 variables, input treesize:1227, output treesize:115 [2021-06-05 22:07:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:30,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940301088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:30,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:30,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:07:30,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249852922] [2021-06-05 22:07:30,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:30,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:30,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:30,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:30,997 INFO L87 Difference]: Start difference. First operand 709 states and 2437 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:07:31,711 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2021-06-05 22:07:32,155 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-06-05 22:07:32,631 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2021-06-05 22:07:33,195 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 92 [2021-06-05 22:07:33,529 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 22:07:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:33,621 INFO L93 Difference]: Finished difference Result 884 states and 2887 transitions. [2021-06-05 22:07:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:07:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:07:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:33,622 INFO L225 Difference]: With dead ends: 884 [2021-06-05 22:07:33,622 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 22:07:33,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3306.8ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:07:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 22:07:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 708. [2021-06-05 22:07:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.442715700141443) internal successors, (2434), 707 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2434 transitions. [2021-06-05 22:07:33,630 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2434 transitions. Word has length 20 [2021-06-05 22:07:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:33,630 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2434 transitions. [2021-06-05 22:07:33,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:07:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2434 transitions. [2021-06-05 22:07:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:33,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:33,631 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:33,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9701,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:33,831 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1645801780, now seen corresponding path program 64 times [2021-06-05 22:07:33,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:33,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211181362] [2021-06-05 22:07:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211181362] [2021-06-05 22:07:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211181362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171072970] [2021-06-05 22:07:34,103 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 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 22:07:34,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:34,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:34,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:07:34,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:34,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171072970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:34,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:34,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:07:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473713276] [2021-06-05 22:07:34,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:34,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:34,609 INFO L87 Difference]: Start difference. First operand 708 states and 2434 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:07:34,863 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 22:07:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:34,895 INFO L93 Difference]: Finished difference Result 781 states and 2622 transitions. [2021-06-05 22:07:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:07:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:34,896 INFO L225 Difference]: With dead ends: 781 [2021-06-05 22:07:34,896 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 22:07:34,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 22:07:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 708. [2021-06-05 22:07:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.442715700141443) internal successors, (2434), 707 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2434 transitions. [2021-06-05 22:07:34,903 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2434 transitions. Word has length 20 [2021-06-05 22:07:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:34,903 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2434 transitions. [2021-06-05 22:07:34,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:07:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2434 transitions. [2021-06-05 22:07:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:34,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:34,904 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:35,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10026 [2021-06-05 22:07:35,105 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1066698872, now seen corresponding path program 65 times [2021-06-05 22:07:35,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:35,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401273711] [2021-06-05 22:07:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:35,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:35,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401273711] [2021-06-05 22:07:35,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401273711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:35,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731774177] [2021-06-05 22:07:35,397 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 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 22:07:35,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:35,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:07:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731774177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:35,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:35,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:07:35,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374488430] [2021-06-05 22:07:35,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:07:35,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:07:35,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:35,925 INFO L87 Difference]: Start difference. First operand 708 states and 2434 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:07:36,465 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-05 22:07:36,647 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 22:07:36,903 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 22:07:37,051 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 22:07:37,290 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 22:07:37,513 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-06-05 22:07:37,688 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 22:07:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:37,711 INFO L93 Difference]: Finished difference Result 995 states and 3201 transitions. [2021-06-05 22:07:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:07:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:07:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:37,713 INFO L225 Difference]: With dead ends: 995 [2021-06-05 22:07:37,713 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 22:07:37,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1996.1ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:07:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 22:07:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 714. [2021-06-05 22:07:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.4488078541374474) internal successors, (2459), 713 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2459 transitions. [2021-06-05 22:07:37,721 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2459 transitions. Word has length 20 [2021-06-05 22:07:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:37,721 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2459 transitions. [2021-06-05 22:07:37,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:07:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2459 transitions. [2021-06-05 22:07:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:37,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:37,722 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:37,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10048,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:37,923 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1773524372, now seen corresponding path program 66 times [2021-06-05 22:07:37,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:37,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017195933] [2021-06-05 22:07:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:38,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:38,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017195933] [2021-06-05 22:07:38,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017195933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:38,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280990122] [2021-06-05 22:07:38,143 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:38,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:38,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:07:38,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,417 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:38,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,422 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:38,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,427 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:38,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,433 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:38,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,437 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:07:38,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,442 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:38,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,447 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:38,448 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:07:38,454 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,458 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:07:38,459 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,462 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 3 treesize of output 1 [2021-06-05 22:07:38,463 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,468 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:38,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,472 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 5 treesize of output 1 [2021-06-05 22:07:38,473 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,477 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:38,478 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:38,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:38,486 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,490 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:07:38,491 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:38,495 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,499 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:38,500 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,504 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:07:38,505 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:38,508 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:38,509 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:38,749 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 22:07:38,749 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 22:07:38,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:07:38,753 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:714, output treesize:277 [2021-06-05 22:07:38,964 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 22:07:39,109 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:07:39,697 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 4 treesize of output 2 [2021-06-05 22:07:39,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:39,707 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:07:39,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:39,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:39,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,079 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2021-06-05 22:07:40,079 INFO L628 ElimStorePlain]: treesize reduction 276, result has 49.9 percent of original size [2021-06-05 22:07:40,084 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 4 treesize of output 2 [2021-06-05 22:07:40,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,203 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 22:07:40,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:40,208 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 3 treesize of output 1 [2021-06-05 22:07:40,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,327 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 22:07:40,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:40,331 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 5 treesize of output 1 [2021-06-05 22:07:40,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,536 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-06-05 22:07:40,536 INFO L628 ElimStorePlain]: treesize reduction 36, result has 86.3 percent of original size [2021-06-05 22:07:40,540 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 4 treesize of output 2 [2021-06-05 22:07:40,541 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,643 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 22:07:40,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:40,647 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 5 treesize of output 1 [2021-06-05 22:07:40,648 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:40,751 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 6 treesize of output 2 [2021-06-05 22:07:40,752 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,855 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 22:07:40,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:40,859 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 3 treesize of output 1 [2021-06-05 22:07:40,860 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:40,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:40,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:07:40,956 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:595, output treesize:177 [2021-06-05 22:07:41,112 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 22:07:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:41,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280990122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:41,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:41,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:07:41,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999964641] [2021-06-05 22:07:41,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:07:41,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:41,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:07:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:41,363 INFO L87 Difference]: Start difference. First operand 714 states and 2459 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:41,843 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 22:07:42,476 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-06-05 22:07:42,820 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2021-06-05 22:07:43,215 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2021-06-05 22:07:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:43,255 INFO L93 Difference]: Finished difference Result 1129 states and 3675 transitions. [2021-06-05 22:07:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:07:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:43,257 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 22:07:43,257 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 22:07:43,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2391.8ms TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:07:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 22:07:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 729. [2021-06-05 22:07:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.451923076923077) internal successors, (2513), 728 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2513 transitions. [2021-06-05 22:07:43,266 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2513 transitions. Word has length 20 [2021-06-05 22:07:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:43,266 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2513 transitions. [2021-06-05 22:07:43,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2513 transitions. [2021-06-05 22:07:43,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:43,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:43,267 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:43,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10072 [2021-06-05 22:07:43,469 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 261504928, now seen corresponding path program 67 times [2021-06-05 22:07:43,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:43,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671444283] [2021-06-05 22:07:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:43,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:43,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671444283] [2021-06-05 22:07:43,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671444283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:43,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821061413] [2021-06-05 22:07:43,698 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 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 22:07:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:07:43,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:43,921 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 5 treesize of output 1 [2021-06-05 22:07:43,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,926 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 6 treesize of output 2 [2021-06-05 22:07:43,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,930 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 5 treesize of output 1 [2021-06-05 22:07:43,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:43,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,939 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 6 treesize of output 2 [2021-06-05 22:07:43,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,943 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 3 treesize of output 1 [2021-06-05 22:07:43,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,948 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 5 treesize of output 1 [2021-06-05 22:07:43,949 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,952 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 4 treesize of output 2 [2021-06-05 22:07:43,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,957 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 6 treesize of output 2 [2021-06-05 22:07:43,958 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:43,961 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 6 treesize of output 2 [2021-06-05 22:07:43,962 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:44,185 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 22:07:44,185 INFO L628 ElimStorePlain]: treesize reduction 31, result has 89.2 percent of original size [2021-06-05 22:07:44,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 8 xjuncts. [2021-06-05 22:07:44,189 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:376, output treesize:255 [2021-06-05 22:07:44,421 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 22:07:44,588 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 22:07:44,780 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 22:07:45,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:45,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,535 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:45,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:45,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,763 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 61 [2021-06-05 22:07:45,764 INFO L628 ElimStorePlain]: treesize reduction 482, result has 27.7 percent of original size [2021-06-05 22:07:45,767 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 5 treesize of output 1 [2021-06-05 22:07:45,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:45,841 INFO L518 ElimStorePlain]: Eliminatee v_prenex_559 vanished before elimination [2021-06-05 22:07:45,845 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 6 treesize of output 2 [2021-06-05 22:07:45,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:45,917 INFO L518 ElimStorePlain]: Eliminatee v_prenex_558 vanished before elimination [2021-06-05 22:07:45,917 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-06-05 22:07:45,917 INFO L518 ElimStorePlain]: Eliminatee v_prenex_561 vanished before elimination [2021-06-05 22:07:45,920 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 5 treesize of output 1 [2021-06-05 22:07:45,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:45,994 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 3 treesize of output 1 [2021-06-05 22:07:45,995 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:46,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:46,066 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 5 treesize of output 1 [2021-06-05 22:07:46,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:46,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:46,135 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 3 treesize of output 1 [2021-06-05 22:07:46,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:46,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:46,203 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 6 treesize of output 2 [2021-06-05 22:07:46,204 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:46,313 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 22:07:46,313 INFO L628 ElimStorePlain]: treesize reduction 25, result has 83.6 percent of original size [2021-06-05 22:07:46,316 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 4 treesize of output 2 [2021-06-05 22:07:46,317 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:46,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:46,369 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-06-05 22:07:46,372 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 4 treesize of output 2 [2021-06-05 22:07:46,373 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:46,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:46,426 INFO L518 ElimStorePlain]: Eliminatee v_prenex_560 vanished before elimination [2021-06-05 22:07:46,426 INFO L518 ElimStorePlain]: Eliminatee v_prenex_571 vanished before elimination [2021-06-05 22:07:46,426 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-06-05 22:07:46,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:07:46,427 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:748, output treesize:119 [2021-06-05 22:07:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821061413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:46,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:07:46,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780812715] [2021-06-05 22:07:46,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:07:46,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:07:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:46,571 INFO L87 Difference]: Start difference. First operand 729 states and 2513 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:47,568 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2021-06-05 22:07:47,896 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 105 [2021-06-05 22:07:48,329 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 99 [2021-06-05 22:07:48,465 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 22:07:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:48,511 INFO L93 Difference]: Finished difference Result 1026 states and 3386 transitions. [2021-06-05 22:07:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:07:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:48,513 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 22:07:48,513 INFO L226 Difference]: Without dead ends: 1011 [2021-06-05 22:07:48,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2570.0ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:07:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-05 22:07:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 726. [2021-06-05 22:07:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.449655172413793) internal successors, (2501), 725 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2501 transitions. [2021-06-05 22:07:48,523 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2501 transitions. Word has length 20 [2021-06-05 22:07:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:48,523 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2501 transitions. [2021-06-05 22:07:48,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2501 transitions. [2021-06-05 22:07:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:48,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:48,524 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-06-05 22:07:48,729 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 679831486, now seen corresponding path program 68 times [2021-06-05 22:07:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069489752] [2021-06-05 22:07:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:48,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069489752] [2021-06-05 22:07:48,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069489752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532429253] [2021-06-05 22:07:48,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:07:48,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:48,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:07:48,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:49,155 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 6 treesize of output 2 [2021-06-05 22:07:49,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,160 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 4 treesize of output 2 [2021-06-05 22:07:49,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,165 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 6 treesize of output 2 [2021-06-05 22:07:49,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,170 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 6 treesize of output 2 [2021-06-05 22:07:49,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,174 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 5 treesize of output 1 [2021-06-05 22:07:49,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,179 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 3 treesize of output 1 [2021-06-05 22:07:49,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,183 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 6 treesize of output 2 [2021-06-05 22:07:49,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,188 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 5 treesize of output 1 [2021-06-05 22:07:49,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,193 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 6 treesize of output 2 [2021-06-05 22:07:49,193 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:49,197 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,201 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 6 treesize of output 2 [2021-06-05 22:07:49,202 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,206 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 5 treesize of output 1 [2021-06-05 22:07:49,207 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:49,210 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,450 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-06-05 22:07:49,450 INFO L628 ElimStorePlain]: treesize reduction 73, result has 79.4 percent of original size [2021-06-05 22:07:49,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-06-05 22:07:49,454 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 2 variables, input treesize:483, output treesize:281 [2021-06-05 22:07:49,681 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2021-06-05 22:07:50,570 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_2, ends_with_10, v_prenex_584, v_prenex_594, v_prenex_583, v_prenex_586, v_prenex_575, v_prenex_585, v_prenex_574, v_prenex_588, v_prenex_577, v_prenex_587, v_prenex_576, v_prenex_589, v_prenex_580, v_prenex_590, v_prenex_582, v_prenex_581], 10=[v_prenex_579, v_prenex_578, v_prenex_591, v_prenex_592]} [2021-06-05 22:07:50,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:50,579 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:50,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:50,767 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 64 [2021-06-05 22:07:50,767 INFO L628 ElimStorePlain]: treesize reduction 666, result has 20.0 percent of original size [2021-06-05 22:07:50,767 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:07:50,770 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 3 treesize of output 1 [2021-06-05 22:07:50,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:50,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_594 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_583 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_575 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_585 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_574 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_588 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_577 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_587 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_576 vanished before elimination [2021-06-05 22:07:50,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_589 vanished before elimination [2021-06-05 22:07:50,833 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 6 treesize of output 2 [2021-06-05 22:07:50,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:50,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_590 vanished before elimination [2021-06-05 22:07:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_582 vanished before elimination [2021-06-05 22:07:50,894 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 6 treesize of output 2 [2021-06-05 22:07:50,895 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:50,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:50,964 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 6 treesize of output 2 [2021-06-05 22:07:50,964 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:50,967 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 6 treesize of output 2 [2021-06-05 22:07:50,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:51,021 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 5 treesize of output 1 [2021-06-05 22:07:51,022 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,025 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 5 treesize of output 1 [2021-06-05 22:07:51,026 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:51,076 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 6 treesize of output 2 [2021-06-05 22:07:51,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:51,126 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 5 treesize of output 1 [2021-06-05 22:07:51,127 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:51,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 22 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:07:51,174 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:868, output treesize:118 [2021-06-05 22:07:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:51,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532429253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:51,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:51,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:07:51,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199654512] [2021-06-05 22:07:51,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:07:51,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:07:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:51,320 INFO L87 Difference]: Start difference. First operand 726 states and 2501 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,719 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-06-05 22:07:51,995 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 22:07:52,350 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2021-06-05 22:07:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:52,412 INFO L93 Difference]: Finished difference Result 928 states and 3105 transitions. [2021-06-05 22:07:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:52,413 INFO L225 Difference]: With dead ends: 928 [2021-06-05 22:07:52,413 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 22:07:52,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1610.5ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 22:07:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 723. [2021-06-05 22:07:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.4473684210526314) internal successors, (2489), 722 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2489 transitions. [2021-06-05 22:07:52,421 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2489 transitions. Word has length 20 [2021-06-05 22:07:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:52,421 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2489 transitions. [2021-06-05 22:07:52,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2489 transitions. [2021-06-05 22:07:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:52,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:52,422 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:52,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10433 [2021-06-05 22:07:52,623 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash 49349310, now seen corresponding path program 69 times [2021-06-05 22:07:52,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:52,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628866521] [2021-06-05 22:07:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:52,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:52,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628866521] [2021-06-05 22:07:52,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628866521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390508843] [2021-06-05 22:07:52,842 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 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 22:07:52,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:52,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:07:52,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:53,074 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 5 treesize of output 1 [2021-06-05 22:07:53,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,079 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 3 treesize of output 1 [2021-06-05 22:07:53,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,084 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 4 treesize of output 2 [2021-06-05 22:07:53,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,089 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 6 treesize of output 2 [2021-06-05 22:07:53,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,093 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 6 treesize of output 2 [2021-06-05 22:07:53,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,098 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 6 treesize of output 2 [2021-06-05 22:07:53,099 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,103 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 5 treesize of output 1 [2021-06-05 22:07:53,104 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,108 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 6 treesize of output 2 [2021-06-05 22:07:53,109 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,113 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 5 treesize of output 1 [2021-06-05 22:07:53,114 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,118 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 6 treesize of output 2 [2021-06-05 22:07:53,118 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,423 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 22:07:53,424 INFO L628 ElimStorePlain]: treesize reduction 34, result has 90.6 percent of original size [2021-06-05 22:07:53,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-06-05 22:07:53,428 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:412, output treesize:326 [2021-06-05 22:07:53,724 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-06-05 22:07:53,923 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 22:07:54,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:54,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:54,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:54,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:54,861 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 65 [2021-06-05 22:07:54,861 INFO L628 ElimStorePlain]: treesize reduction 577, result has 25.0 percent of original size [2021-06-05 22:07:54,865 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 5 treesize of output 1 [2021-06-05 22:07:54,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:54,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:54,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_613 vanished before elimination [2021-06-05 22:07:54,942 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 5 treesize of output 1 [2021-06-05 22:07:54,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:55,019 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 6 treesize of output 2 [2021-06-05 22:07:55,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:55,090 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-06-05 22:07:55,093 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 4 treesize of output 2 [2021-06-05 22:07:55,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:55,165 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 4 treesize of output 2 [2021-06-05 22:07:55,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:55,237 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 3 treesize of output 1 [2021-06-05 22:07:55,238 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,353 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 22:07:55,354 INFO L628 ElimStorePlain]: treesize reduction 23, result has 86.1 percent of original size [2021-06-05 22:07:55,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_601 vanished before elimination [2021-06-05 22:07:55,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_600 vanished before elimination [2021-06-05 22:07:55,357 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 3 treesize of output 1 [2021-06-05 22:07:55,358 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,451 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.9 percent of original size [2021-06-05 22:07:55,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_603 vanished before elimination [2021-06-05 22:07:55,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_602 vanished before elimination [2021-06-05 22:07:55,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_605 vanished before elimination [2021-06-05 22:07:55,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_604 vanished before elimination [2021-06-05 22:07:55,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_607 vanished before elimination [2021-06-05 22:07:55,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-06-05 22:07:55,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-06-05 22:07:55,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_608 vanished before elimination [2021-06-05 22:07:55,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_597 vanished before elimination [2021-06-05 22:07:55,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-06-05 22:07:55,454 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 4 treesize of output 2 [2021-06-05 22:07:55,455 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:55,498 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-06-05 22:07:55,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_598 vanished before elimination [2021-06-05 22:07:55,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-06-05 22:07:55,501 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 6 treesize of output 2 [2021-06-05 22:07:55,502 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:55,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:55,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 27 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:07:55,545 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 27 variables, input treesize:838, output treesize:108 [2021-06-05 22:07:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:55,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390508843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:55,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:55,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:07:55,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631953084] [2021-06-05 22:07:55,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:07:55,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:07:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:55,683 INFO L87 Difference]: Start difference. First operand 723 states and 2489 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,287 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-05 22:07:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:56,358 INFO L93 Difference]: Finished difference Result 783 states and 2648 transitions. [2021-06-05 22:07:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:56,360 INFO L225 Difference]: With dead ends: 783 [2021-06-05 22:07:56,360 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 22:07:56,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1304.3ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 22:07:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 721. [2021-06-05 22:07:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.4472222222222224) internal successors, (2482), 720 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2482 transitions. [2021-06-05 22:07:56,367 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2482 transitions. Word has length 20 [2021-06-05 22:07:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:56,367 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2482 transitions. [2021-06-05 22:07:56,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2482 transitions. [2021-06-05 22:07:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:56,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:56,368 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:56,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10554,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:56,569 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash -707677058, now seen corresponding path program 70 times [2021-06-05 22:07:56,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:56,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379459779] [2021-06-05 22:07:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:56,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:56,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379459779] [2021-06-05 22:07:56,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379459779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:56,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198327748] [2021-06-05 22:07:56,761 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 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 22:07:56,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:56,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:56,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:07:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:57,049 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 5 treesize of output 1 [2021-06-05 22:07:57,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,055 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 6 treesize of output 2 [2021-06-05 22:07:57,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,062 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 6 treesize of output 2 [2021-06-05 22:07:57,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,068 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 6 treesize of output 2 [2021-06-05 22:07:57,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,074 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 5 treesize of output 1 [2021-06-05 22:07:57,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,080 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 5 treesize of output 1 [2021-06-05 22:07:57,081 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,086 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 4 treesize of output 2 [2021-06-05 22:07:57,087 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,093 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 6 treesize of output 2 [2021-06-05 22:07:57,094 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,099 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 3 treesize of output 1 [2021-06-05 22:07:57,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,106 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 6 treesize of output 2 [2021-06-05 22:07:57,107 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:57,112 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,472 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 22:07:57,473 INFO L628 ElimStorePlain]: treesize reduction 42, result has 88.6 percent of original size [2021-06-05 22:07:57,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-06-05 22:07:57,477 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:458, output treesize:326 [2021-06-05 22:07:57,767 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-06-05 22:07:58,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,509 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:07:58,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:58,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:58,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,528 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:07:58,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:58,534 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,802 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 80 [2021-06-05 22:07:58,802 INFO L628 ElimStorePlain]: treesize reduction 713, result has 23.1 percent of original size [2021-06-05 22:07:58,807 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 3 treesize of output 1 [2021-06-05 22:07:58,808 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,812 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 5 treesize of output 1 [2021-06-05 22:07:58,812 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:58,896 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 3 treesize of output 1 [2021-06-05 22:07:58,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:58,980 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 3 treesize of output 1 [2021-06-05 22:07:58,981 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:59,062 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 3 treesize of output 1 [2021-06-05 22:07:59,063 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:59,143 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 6 treesize of output 2 [2021-06-05 22:07:59,144 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:59,223 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 4 treesize of output 2 [2021-06-05 22:07:59,224 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,351 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 22:07:59,351 INFO L628 ElimStorePlain]: treesize reduction 25, result has 86.6 percent of original size [2021-06-05 22:07:59,355 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 4 treesize of output 2 [2021-06-05 22:07:59,356 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:59,418 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 5 treesize of output 1 [2021-06-05 22:07:59,419 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:59,479 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 5 treesize of output 1 [2021-06-05 22:07:59,480 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:59,539 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 4 treesize of output 2 [2021-06-05 22:07:59,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:59,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:59,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 11 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:07:59,597 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:1104, output treesize:136 [2021-06-05 22:07:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:59,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198327748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:59,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:07:59,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555469159] [2021-06-05 22:07:59,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:07:59,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:07:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:59,824 INFO L87 Difference]: Start difference. First operand 721 states and 2482 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,585 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-05 22:08:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:00,645 INFO L93 Difference]: Finished difference Result 793 states and 2673 transitions. [2021-06-05 22:08:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:00,646 INFO L225 Difference]: With dead ends: 793 [2021-06-05 22:08:00,646 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 22:08:00,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1342.0ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 22:08:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 720. [2021-06-05 22:08:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.4450625869262863) internal successors, (2477), 719 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2477 transitions. [2021-06-05 22:08:00,654 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2477 transitions. Word has length 20 [2021-06-05 22:08:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:00,654 INFO L482 AbstractCegarLoop]: Abstraction has 720 states and 2477 transitions. [2021-06-05 22:08:00,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2477 transitions. [2021-06-05 22:08:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:00,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:00,655 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:00,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10722 [2021-06-05 22:08:00,861 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash -128574150, now seen corresponding path program 71 times [2021-06-05 22:08:00,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:00,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981623420] [2021-06-05 22:08:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:01,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:01,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981623420] [2021-06-05 22:08:01,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981623420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:01,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177278766] [2021-06-05 22:08:01,107 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 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 22:08:01,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:01,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:01,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177278766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:01,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:01,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:08:01,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464527419] [2021-06-05 22:08:01,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:08:01,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:08:01,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:01,686 INFO L87 Difference]: Start difference. First operand 720 states and 2477 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:08:02,610 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2021-06-05 22:08:02,859 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 22:08:03,138 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 22:08:03,510 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-06-05 22:08:03,745 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2021-06-05 22:08:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:03,865 INFO L93 Difference]: Finished difference Result 1213 states and 3869 transitions. [2021-06-05 22:08:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:08:03,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-06-05 22:08:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:03,867 INFO L225 Difference]: With dead ends: 1213 [2021-06-05 22:08:03,867 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 22:08:03,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2389.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:08:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 22:08:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 723. [2021-06-05 22:08:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.4542936288088644) internal successors, (2494), 722 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2494 transitions. [2021-06-05 22:08:03,876 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2494 transitions. Word has length 20 [2021-06-05 22:08:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:03,877 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2494 transitions. [2021-06-05 22:08:03,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 22:08:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2494 transitions. [2021-06-05 22:08:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:03,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:03,878 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:04,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11007,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:04,078 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 72 times [2021-06-05 22:08:04,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:04,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917989101] [2021-06-05 22:08:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:04,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:04,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917989101] [2021-06-05 22:08:04,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917989101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:04,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970685676] [2021-06-05 22:08:04,243 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 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 22:08:04,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:04,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:08:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:04,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970685676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:04,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:04,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:04,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015367695] [2021-06-05 22:08:04,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:04,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:04,745 INFO L87 Difference]: Start difference. First operand 723 states and 2494 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,149 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 22:08:05,427 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 22:08:05,691 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-05 22:08:05,811 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 22:08:05,971 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 22:08:06,099 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 22:08:06,326 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 22:08:06,469 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 22:08:06,704 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 22:08:06,845 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 22:08:07,085 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-06-05 22:08:07,286 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-06-05 22:08:07,538 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-06-05 22:08:07,733 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 22:08:08,046 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 22:08:08,267 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 22:08:08,571 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-05 22:08:08,774 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 22:08:09,077 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 22:08:09,397 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-06-05 22:08:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:09,433 INFO L93 Difference]: Finished difference Result 1211 states and 3952 transitions. [2021-06-05 22:08:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:08:09,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:09,435 INFO L225 Difference]: With dead ends: 1211 [2021-06-05 22:08:09,435 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 22:08:09,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 4609.8ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:08:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 22:08:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 741. [2021-06-05 22:08:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.443243243243243) internal successors, (2548), 740 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2548 transitions. [2021-06-05 22:08:09,444 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2548 transitions. Word has length 20 [2021-06-05 22:08:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:09,444 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2548 transitions. [2021-06-05 22:08:09,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2548 transitions. [2021-06-05 22:08:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:09,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:09,445 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:09,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11026 [2021-06-05 22:08:09,646 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:09,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 73 times [2021-06-05 22:08:09,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:09,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082009038] [2021-06-05 22:08:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:09,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082009038] [2021-06-05 22:08:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082009038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64917857] [2021-06-05 22:08:09,837 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 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 22:08:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:08:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:10,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64917857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:10,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:10,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133106637] [2021-06-05 22:08:10,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:10,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:10,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:10,413 INFO L87 Difference]: Start difference. First operand 741 states and 2548 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,362 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-05 22:08:11,519 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 22:08:11,658 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 22:08:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:11,678 INFO L93 Difference]: Finished difference Result 1086 states and 3521 transitions. [2021-06-05 22:08:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:08:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:11,680 INFO L225 Difference]: With dead ends: 1086 [2021-06-05 22:08:11,680 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 22:08:11,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1485.4ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:08:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 22:08:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 745. [2021-06-05 22:08:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.4381720430107525) internal successors, (2558), 744 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2558 transitions. [2021-06-05 22:08:11,689 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2558 transitions. Word has length 20 [2021-06-05 22:08:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:11,689 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 2558 transitions. [2021-06-05 22:08:11,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2558 transitions. [2021-06-05 22:08:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:11,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:11,690 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:11,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11047 [2021-06-05 22:08:11,892 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash -555887772, now seen corresponding path program 74 times [2021-06-05 22:08:11,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:11,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085304933] [2021-06-05 22:08:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:12,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:12,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085304933] [2021-06-05 22:08:12,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085304933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:12,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335154096] [2021-06-05 22:08:12,077 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 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 22:08:12,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:12,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:12,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:08:12,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:12,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335154096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:12,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:12,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:12,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273891180] [2021-06-05 22:08:12,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:12,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:12,564 INFO L87 Difference]: Start difference. First operand 745 states and 2558 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:13,024 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 22:08:13,288 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-06-05 22:08:13,589 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 22:08:13,811 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 22:08:14,022 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 22:08:14,367 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 22:08:14,526 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 22:08:14,790 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-06-05 22:08:14,930 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 22:08:15,059 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 22:08:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:15,102 INFO L93 Difference]: Finished difference Result 1118 states and 3671 transitions. [2021-06-05 22:08:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:08:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:15,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:15,104 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 22:08:15,104 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 22:08:15,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2557.8ms TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:08:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 22:08:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 746. [2021-06-05 22:08:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.438926174496644) internal successors, (2562), 745 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2562 transitions. [2021-06-05 22:08:15,113 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2562 transitions. Word has length 20 [2021-06-05 22:08:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:15,113 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 2562 transitions. [2021-06-05 22:08:15,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2562 transitions. [2021-06-05 22:08:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:15,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:15,114 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:15,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11066,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:15,315 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1896142186, now seen corresponding path program 75 times [2021-06-05 22:08:15,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:15,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971638573] [2021-06-05 22:08:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:15,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971638573] [2021-06-05 22:08:15,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971638573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265093772] [2021-06-05 22:08:15,518 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 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 22:08:15,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:08:15,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:08:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:16,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265093772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:16,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:16,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:16,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764404723] [2021-06-05 22:08:16,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:16,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:16,017 INFO L87 Difference]: Start difference. First operand 746 states and 2562 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:16,867 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 22:08:17,110 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-05 22:08:17,414 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 22:08:17,598 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 22:08:17,815 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 22:08:18,097 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-06-05 22:08:18,238 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 22:08:18,548 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 22:08:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:18,577 INFO L93 Difference]: Finished difference Result 1245 states and 4029 transitions. [2021-06-05 22:08:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:08:18,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:18,579 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 22:08:18,579 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 22:08:18,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2746.0ms TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:08:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 22:08:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 754. [2021-06-05 22:08:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.4395750332005313) internal successors, (2590), 753 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2590 transitions. [2021-06-05 22:08:18,589 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2590 transitions. Word has length 20 [2021-06-05 22:08:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:18,589 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2590 transitions. [2021-06-05 22:08:18,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2590 transitions. [2021-06-05 22:08:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:18,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:18,590 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:18,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11089,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:18,791 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1801488452, now seen corresponding path program 76 times [2021-06-05 22:08:18,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:18,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583494489] [2021-06-05 22:08:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:19,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:19,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583494489] [2021-06-05 22:08:19,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583494489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:19,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480949193] [2021-06-05 22:08:19,019 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 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 22:08:19,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:19,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:19,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:19,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:19,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480949193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:19,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:19,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:19,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476005037] [2021-06-05 22:08:19,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:19,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:19,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:19,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:19,576 INFO L87 Difference]: Start difference. First operand 754 states and 2590 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:20,667 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-05 22:08:20,967 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 22:08:21,390 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 22:08:21,515 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 22:08:21,665 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 22:08:21,857 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 22:08:22,223 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 22:08:22,395 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 22:08:22,609 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-06-05 22:08:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:22,759 INFO L93 Difference]: Finished difference Result 1351 states and 4386 transitions. [2021-06-05 22:08:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:08:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:22,761 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 22:08:22,761 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 22:08:22,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3269.4ms TimeCoverageRelationStatistics Valid=457, Invalid=1705, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:08:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 22:08:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 760. [2021-06-05 22:08:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.437417654808959) internal successors, (2609), 759 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2609 transitions. [2021-06-05 22:08:22,771 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2609 transitions. Word has length 20 [2021-06-05 22:08:22,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:22,771 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2609 transitions. [2021-06-05 22:08:22,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2609 transitions. [2021-06-05 22:08:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:22,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:22,772 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:22,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11110,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:22,972 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash -625997808, now seen corresponding path program 77 times [2021-06-05 22:08:22,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:22,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487664189] [2021-06-05 22:08:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:23,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:23,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487664189] [2021-06-05 22:08:23,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487664189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:23,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212974144] [2021-06-05 22:08:23,121 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 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 22:08:23,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:23,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:23,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212974144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:23,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:23,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:08:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411439882] [2021-06-05 22:08:23,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:08:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:08:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:23,651 INFO L87 Difference]: Start difference. First operand 760 states and 2609 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:08:24,081 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-06-05 22:08:24,782 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-06-05 22:08:25,124 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 22:08:25,310 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-05 22:08:25,803 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 22:08:26,098 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 22:08:26,432 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 22:08:26,665 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 22:08:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:26,687 INFO L93 Difference]: Finished difference Result 1228 states and 4050 transitions. [2021-06-05 22:08:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:08:26,687 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:08:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:26,689 INFO L225 Difference]: With dead ends: 1228 [2021-06-05 22:08:26,689 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 22:08:26,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2913.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:08:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 22:08:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 760. [2021-06-05 22:08:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.437417654808959) internal successors, (2609), 759 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2609 transitions. [2021-06-05 22:08:26,698 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2609 transitions. Word has length 20 [2021-06-05 22:08:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:26,698 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2609 transitions. [2021-06-05 22:08:26,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:08:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2609 transitions. [2021-06-05 22:08:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:26,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:26,699 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:26,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11128,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:26,900 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:26,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1601784788, now seen corresponding path program 78 times [2021-06-05 22:08:26,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:26,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219575034] [2021-06-05 22:08:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:27,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219575034] [2021-06-05 22:08:27,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219575034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837865761] [2021-06-05 22:08:27,124 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 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 22:08:27,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:27,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:27,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:08:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:27,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837865761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:27,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:27,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:27,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735289975] [2021-06-05 22:08:27,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:27,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:27,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:27,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:27,690 INFO L87 Difference]: Start difference. First operand 760 states and 2609 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:28,436 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 22:08:28,902 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 22:08:29,115 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 22:08:29,342 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-05 22:08:29,591 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 22:08:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:29,628 INFO L93 Difference]: Finished difference Result 1211 states and 3932 transitions. [2021-06-05 22:08:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:08:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:29,629 INFO L225 Difference]: With dead ends: 1211 [2021-06-05 22:08:29,629 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 22:08:29,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2109.4ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:08:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 22:08:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 755. [2021-06-05 22:08:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4416445623342176) internal successors, (2595), 754 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2595 transitions. [2021-06-05 22:08:29,639 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2595 transitions. Word has length 20 [2021-06-05 22:08:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:29,639 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2595 transitions. [2021-06-05 22:08:29,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2595 transitions. [2021-06-05 22:08:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:29,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:29,640 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:29,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11145 [2021-06-05 22:08:29,840 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1270707550, now seen corresponding path program 79 times [2021-06-05 22:08:29,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:29,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984827852] [2021-06-05 22:08:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:30,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:30,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984827852] [2021-06-05 22:08:30,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984827852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:30,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483499991] [2021-06-05 22:08:30,044 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 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 22:08:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:30,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:30,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483499991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:30,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:30,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:30,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456583982] [2021-06-05 22:08:30,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:30,615 INFO L87 Difference]: Start difference. First operand 755 states and 2595 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:31,918 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 22:08:32,183 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 22:08:32,535 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 22:08:32,680 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 22:08:32,862 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 22:08:33,154 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 22:08:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:33,262 INFO L93 Difference]: Finished difference Result 1507 states and 4666 transitions. [2021-06-05 22:08:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:08:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:33,264 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 22:08:33,264 INFO L226 Difference]: Without dead ends: 1417 [2021-06-05 22:08:33,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2736.4ms TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:08:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-05 22:08:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 782. [2021-06-05 22:08:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.4532650448143407) internal successors, (2697), 781 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2697 transitions. [2021-06-05 22:08:33,277 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2697 transitions. Word has length 20 [2021-06-05 22:08:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:33,277 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2697 transitions. [2021-06-05 22:08:33,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2697 transitions. [2021-06-05 22:08:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:33,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:33,278 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:33,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11169 [2021-06-05 22:08:33,478 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:33,479 INFO L82 PathProgramCache]: Analyzing trace with hash -519643180, now seen corresponding path program 80 times [2021-06-05 22:08:33,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:33,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231874356] [2021-06-05 22:08:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:33,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:33,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231874356] [2021-06-05 22:08:33,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231874356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:33,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799261550] [2021-06-05 22:08:33,665 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 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 22:08:33,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:33,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:33,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:33,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:34,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799261550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:34,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:34,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:08:34,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858710265] [2021-06-05 22:08:34,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:08:34,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:08:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:34,215 INFO L87 Difference]: Start difference. First operand 782 states and 2697 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:34,699 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:08:34,866 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 22:08:35,126 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 22:08:35,359 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-05 22:08:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:35,380 INFO L93 Difference]: Finished difference Result 1223 states and 3950 transitions. [2021-06-05 22:08:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:35,382 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 22:08:35,382 INFO L226 Difference]: Without dead ends: 1178 [2021-06-05 22:08:35,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1426.4ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:08:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-05 22:08:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 778. [2021-06-05 22:08:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.4555984555984556) internal successors, (2685), 777 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2685 transitions. [2021-06-05 22:08:35,392 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2685 transitions. Word has length 20 [2021-06-05 22:08:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:35,392 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 2685 transitions. [2021-06-05 22:08:35,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2685 transitions. [2021-06-05 22:08:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:35,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:35,393 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:35,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11187 [2021-06-05 22:08:35,594 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:35,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2077939720, now seen corresponding path program 81 times [2021-06-05 22:08:35,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:35,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164313359] [2021-06-05 22:08:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:35,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:35,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164313359] [2021-06-05 22:08:35,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164313359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:35,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228633670] [2021-06-05 22:08:35,754 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 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 22:08:35,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:35,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:35,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:08:35,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:36,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,209 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:36,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,214 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:36,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,219 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:36,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,224 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:36,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,228 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 3 treesize of output 1 [2021-06-05 22:08:36,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,232 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:36,233 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,240 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,244 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:36,245 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,249 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:36,249 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,254 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:36,254 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,258 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,262 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,265 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,269 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:36,270 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,273 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,277 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,280 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,283 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:36,284 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,450 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 22:08:36,450 INFO L628 ElimStorePlain]: treesize reduction 63, result has 76.5 percent of original size [2021-06-05 22:08:36,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-06-05 22:08:36,453 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:746, output treesize:197 [2021-06-05 22:08:36,593 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-05 22:08:37,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:37,405 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:37,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:37,522 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-05 22:08:37,522 INFO L628 ElimStorePlain]: treesize reduction 239, result has 30.3 percent of original size [2021-06-05 22:08:37,522 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:08:37,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:08:37,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:353, output treesize:104 [2021-06-05 22:08:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:37,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228633670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:37,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:37,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:08:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222768010] [2021-06-05 22:08:37,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:08:37,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:37,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:08:37,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:37,650 INFO L87 Difference]: Start difference. First operand 778 states and 2685 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:38,160 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-05 22:08:38,557 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-06-05 22:08:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:38,595 INFO L93 Difference]: Finished difference Result 1049 states and 3484 transitions. [2021-06-05 22:08:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:38,597 INFO L225 Difference]: With dead ends: 1049 [2021-06-05 22:08:38,597 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 22:08:38,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1243.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:08:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 22:08:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 782. [2021-06-05 22:08:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.4532650448143407) internal successors, (2697), 781 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2697 transitions. [2021-06-05 22:08:38,606 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2697 transitions. Word has length 20 [2021-06-05 22:08:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:38,606 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2697 transitions. [2021-06-05 22:08:38,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2697 transitions. [2021-06-05 22:08:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:38,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:38,607 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:38,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11216,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:38,810 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash -157505874, now seen corresponding path program 82 times [2021-06-05 22:08:38,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:38,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391388754] [2021-06-05 22:08:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:39,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:39,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391388754] [2021-06-05 22:08:39,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391388754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:39,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136800941] [2021-06-05 22:08:39,042 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 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 22:08:39,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:39,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:39,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:39,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,848 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:39,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,855 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:39,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,862 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:39,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,882 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:39,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,895 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:39,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,902 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:39,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:08:39,910 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,916 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,922 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,934 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:08:39,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,941 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,946 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,951 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,957 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:39,958 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,963 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,969 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:39,969 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,975 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:39,981 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,986 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:39,987 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,993 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:39,994 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,999 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:40,000 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:40,005 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:40,010 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:40,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:08:40,016 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,238 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 22:08:40,238 INFO L628 ElimStorePlain]: treesize reduction 55, result has 76.9 percent of original size [2021-06-05 22:08:40,242 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 3 treesize of output 1 [2021-06-05 22:08:40,243 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,246 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 6 treesize of output 2 [2021-06-05 22:08:40,247 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,249 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 6 treesize of output 2 [2021-06-05 22:08:40,250 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,253 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 4 treesize of output 2 [2021-06-05 22:08:40,254 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,257 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 5 treesize of output 1 [2021-06-05 22:08:40,258 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,260 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 3 treesize of output 1 [2021-06-05 22:08:40,261 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:40,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:40,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:08:40,338 INFO L247 ElimStorePlain]: Needed 35 recursive calls to eliminate 3 variables, input treesize:1173, output treesize:132 [2021-06-05 22:08:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:40,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136800941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:40,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:40,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:08:40,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906692706] [2021-06-05 22:08:40,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:08:40,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:40,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:08:40,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:40,544 INFO L87 Difference]: Start difference. First operand 782 states and 2697 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:41,447 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 22:08:41,846 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 22:08:42,076 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 22:08:42,268 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 22:08:42,450 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 22:08:42,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:42,474 INFO L93 Difference]: Finished difference Result 1142 states and 3655 transitions. [2021-06-05 22:08:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:08:42,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:42,475 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 22:08:42,475 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 22:08:42,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2119.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:08:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 22:08:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 786. [2021-06-05 22:08:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.4535031847133757) internal successors, (2711), 785 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2711 transitions. [2021-06-05 22:08:42,484 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2711 transitions. Word has length 20 [2021-06-05 22:08:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:42,484 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2711 transitions. [2021-06-05 22:08:42,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2711 transitions. [2021-06-05 22:08:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:42,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:42,486 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:42,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11511 [2021-06-05 22:08:42,686 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1017984770, now seen corresponding path program 83 times [2021-06-05 22:08:42,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:42,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653779039] [2021-06-05 22:08:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:42,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:42,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653779039] [2021-06-05 22:08:42,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653779039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:42,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620662942] [2021-06-05 22:08:42,912 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 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 22:08:42,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:42,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:43,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620662942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:43,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:43,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:08:43,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23456053] [2021-06-05 22:08:43,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:08:43,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:08:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:43,402 INFO L87 Difference]: Start difference. First operand 786 states and 2711 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:08:44,829 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-05 22:08:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:44,958 INFO L93 Difference]: Finished difference Result 1051 states and 3423 transitions. [2021-06-05 22:08:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:08:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:08:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:44,960 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 22:08:44,960 INFO L226 Difference]: Without dead ends: 991 [2021-06-05 22:08:44,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1606.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:08:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-06-05 22:08:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 786. [2021-06-05 22:08:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.4535031847133757) internal successors, (2711), 785 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2711 transitions. [2021-06-05 22:08:44,970 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2711 transitions. Word has length 20 [2021-06-05 22:08:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:44,970 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2711 transitions. [2021-06-05 22:08:44,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:08:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2711 transitions. [2021-06-05 22:08:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:44,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:44,972 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:45,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11727 [2021-06-05 22:08:45,172 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1519578236, now seen corresponding path program 84 times [2021-06-05 22:08:45,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:45,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663373737] [2021-06-05 22:08:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:45,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:45,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663373737] [2021-06-05 22:08:45,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663373737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:45,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134387140] [2021-06-05 22:08:45,409 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 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 22:08:45,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:45,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:08:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:46,085 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_634, v_prenex_635, v_prenex_639], 6=[ends_with_10, v_prenex_636, v_prenex_637]} [2021-06-05 22:08:46,091 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 5 treesize of output 1 [2021-06-05 22:08:46,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,476 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 106 [2021-06-05 22:08:46,476 INFO L628 ElimStorePlain]: treesize reduction 472, result has 46.4 percent of original size [2021-06-05 22:08:46,481 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 4 treesize of output 2 [2021-06-05 22:08:46,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,486 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 3 treesize of output 1 [2021-06-05 22:08:46,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,807 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2021-06-05 22:08:46,808 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.3 percent of original size [2021-06-05 22:08:46,812 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 6 treesize of output 2 [2021-06-05 22:08:46,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,967 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 22:08:46,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:46,972 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 4 treesize of output 2 [2021-06-05 22:08:46,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,977 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 6 treesize of output 2 [2021-06-05 22:08:46,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,129 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 22:08:47,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:47,134 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 6 treesize of output 2 [2021-06-05 22:08:47,135 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,139 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 4 treesize of output 2 [2021-06-05 22:08:47,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,289 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:08:47,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:47,293 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 3 treesize of output 1 [2021-06-05 22:08:47,294 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,298 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 3 treesize of output 1 [2021-06-05 22:08:47,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,442 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 22:08:47,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:47,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: 8 dim-0 vars, and 10 xjuncts. [2021-06-05 22:08:47,453 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 9 variables, input treesize:886, output treesize:360 [2021-06-05 22:08:47,692 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 108 [2021-06-05 22:08:48,032 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 89 [2021-06-05 22:08:49,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:49,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,312 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:49,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,319 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:49,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,325 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:49,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:49,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,526 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-06-05 22:08:49,527 INFO L628 ElimStorePlain]: treesize reduction 340, result has 36.9 percent of original size [2021-06-05 22:08:49,530 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 4 treesize of output 2 [2021-06-05 22:08:49,531 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:49,627 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 6 treesize of output 2 [2021-06-05 22:08:49,628 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:49,703 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 6 treesize of output 2 [2021-06-05 22:08:49,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:49,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 22:08:49,776 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:672, output treesize:167 [2021-06-05 22:08:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:49,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134387140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:49,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:49,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:08:49,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612075299] [2021-06-05 22:08:49,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:08:49,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:08:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:49,964 INFO L87 Difference]: Start difference. First operand 786 states and 2711 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:50,382 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 22:08:50,560 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:08:50,862 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 114 [2021-06-05 22:08:51,069 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 22:08:51,409 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 125 [2021-06-05 22:08:51,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:51,444 INFO L93 Difference]: Finished difference Result 1156 states and 3795 transitions. [2021-06-05 22:08:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:51,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:51,445 INFO L225 Difference]: With dead ends: 1156 [2021-06-05 22:08:51,445 INFO L226 Difference]: Without dead ends: 1141 [2021-06-05 22:08:51,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2347.4ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:08:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-06-05 22:08:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 786. [2021-06-05 22:08:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.4535031847133757) internal successors, (2711), 785 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2711 transitions. [2021-06-05 22:08:51,455 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2711 transitions. Word has length 20 [2021-06-05 22:08:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:51,455 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2711 transitions. [2021-06-05 22:08:51,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2711 transitions. [2021-06-05 22:08:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:51,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:51,456 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:51,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11749,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:51,656 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1832315252, now seen corresponding path program 85 times [2021-06-05 22:08:51,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:51,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758968184] [2021-06-05 22:08:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:51,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:51,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758968184] [2021-06-05 22:08:51,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758968184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:51,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205575601] [2021-06-05 22:08:51,870 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 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 22:08:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:51,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:53,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:53,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,325 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:53,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,330 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:08:53,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,340 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:08:53,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,346 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:53,351 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,355 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:53,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,360 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,364 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,369 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,373 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:53,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,377 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,382 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:53,382 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,386 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:53,391 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,395 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:53,400 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,404 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:53,405 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,409 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,413 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:53,413 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,417 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,421 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,602 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 22:08:53,602 INFO L628 ElimStorePlain]: treesize reduction 21, result has 89.7 percent of original size [2021-06-05 22:08:53,605 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 4 treesize of output 2 [2021-06-05 22:08:53,606 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,609 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 6 treesize of output 2 [2021-06-05 22:08:53,610 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,613 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 3 treesize of output 1 [2021-06-05 22:08:53,614 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,617 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 6 treesize of output 2 [2021-06-05 22:08:53,618 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,620 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 5 treesize of output 1 [2021-06-05 22:08:53,621 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,624 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 3 treesize of output 1 [2021-06-05 22:08:53,625 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:53,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:08:53,701 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 3 variables, input treesize:1005, output treesize:132 [2021-06-05 22:08:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:53,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205575601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:53,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:53,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:08:53,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690610954] [2021-06-05 22:08:53,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:08:53,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:08:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:53,906 INFO L87 Difference]: Start difference. First operand 786 states and 2711 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:54,489 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 22:08:54,692 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 22:08:55,175 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 22:08:55,337 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-05 22:08:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:55,354 INFO L93 Difference]: Finished difference Result 1180 states and 3778 transitions. [2021-06-05 22:08:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:08:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:55,356 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 22:08:55,356 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 22:08:55,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1664.4ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:08:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 22:08:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 801. [2021-06-05 22:08:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4575) internal successors, (2766), 800 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2766 transitions. [2021-06-05 22:08:55,366 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2766 transitions. Word has length 20 [2021-06-05 22:08:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:55,366 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2766 transitions. [2021-06-05 22:08:55,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2766 transitions. [2021-06-05 22:08:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:55,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:55,367 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:55,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12232,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:55,569 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1612649706, now seen corresponding path program 86 times [2021-06-05 22:08:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782900063] [2021-06-05 22:08:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:55,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:55,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782900063] [2021-06-05 22:08:55,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782900063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:55,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735042663] [2021-06-05 22:08:55,821 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 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 22:08:55,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:55,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:55,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:08:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:57,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,524 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:08:57,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,537 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:57,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,549 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:57,549 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,556 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:57,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,562 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,568 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:57,568 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,574 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:57,575 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,581 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,586 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:57,587 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,593 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,598 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,603 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,609 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:57,610 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,615 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:57,616 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,621 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:08:57,622 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,627 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,632 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,637 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,643 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,648 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:57,649 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,654 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,659 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,663 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,668 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:57,669 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,674 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:57,675 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,679 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,684 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:57,685 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,690 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:57,691 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,695 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:08:57,696 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,701 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:57,701 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,706 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,710 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:57,711 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,716 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:57,716 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:57,721 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:08:57,722 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,726 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,730 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,067 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 22:08:58,068 INFO L628 ElimStorePlain]: treesize reduction 36, result has 90.3 percent of original size [2021-06-05 22:08:58,072 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 6 treesize of output 2 [2021-06-05 22:08:58,073 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,077 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 6 treesize of output 2 [2021-06-05 22:08:58,078 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,081 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 6 treesize of output 2 [2021-06-05 22:08:58,082 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,085 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 5 treesize of output 1 [2021-06-05 22:08:58,086 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,090 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 5 treesize of output 1 [2021-06-05 22:08:58,091 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,095 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 4 treesize of output 2 [2021-06-05 22:08:58,096 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,099 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 6 treesize of output 2 [2021-06-05 22:08:58,100 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,104 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 3 treesize of output 1 [2021-06-05 22:08:58,105 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,108 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 3 treesize of output 1 [2021-06-05 22:08:58,109 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,112 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 4 treesize of output 2 [2021-06-05 22:08:58,113 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,264 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 22:08:58,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:58,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:08:58,268 INFO L247 ElimStorePlain]: Needed 51 recursive calls to eliminate 3 variables, input treesize:1817, output treesize:257 [2021-06-05 22:08:58,496 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 22:08:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:58,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735042663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:58,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:58,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:08:58,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120678271] [2021-06-05 22:08:58,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:08:58,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:58,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:08:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:58,723 INFO L87 Difference]: Start difference. First operand 801 states and 2766 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,277 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 22:08:59,472 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 22:08:59,603 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 22:08:59,945 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 22:09:00,204 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 22:09:00,464 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 22:09:00,758 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 22:09:00,986 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-06-05 22:09:01,198 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 22:09:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:01,299 INFO L93 Difference]: Finished difference Result 1361 states and 4229 transitions. [2021-06-05 22:09:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:09:01,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:01,301 INFO L225 Difference]: With dead ends: 1361 [2021-06-05 22:09:01,301 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 22:09:01,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2939.5ms TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:09:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 22:09:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 803. [2021-06-05 22:09:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.463840399002494) internal successors, (2778), 802 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2778 transitions. [2021-06-05 22:09:01,311 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2778 transitions. Word has length 20 [2021-06-05 22:09:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:01,311 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2778 transitions. [2021-06-05 22:09:01,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2778 transitions. [2021-06-05 22:09:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:01,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:01,312 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:01,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12766 [2021-06-05 22:09:01,513 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:01,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1682759742, now seen corresponding path program 87 times [2021-06-05 22:09:01,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:01,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188103131] [2021-06-05 22:09:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:01,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:01,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188103131] [2021-06-05 22:09:01,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188103131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:01,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271831880] [2021-06-05 22:09:01,705 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 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 22:09:01,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:09:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:02,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:02,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,088 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:02,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:02,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,097 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:02,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,103 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:02,104 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,108 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:02,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:02,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,118 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:02,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,123 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:02,124 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:02,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,132 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:02,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,138 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:02,138 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,143 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:02,144 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:02,148 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,152 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:02,153 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:02,157 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,161 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:02,162 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:02,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:02,167 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:02,171 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,174 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 3 treesize of output 1 [2021-06-05 22:09:02,175 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:02,421 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 22:09:02,422 INFO L628 ElimStorePlain]: treesize reduction 148, result has 65.2 percent of original size [2021-06-05 22:09:02,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-06-05 22:09:02,426 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:971, output treesize:269 [2021-06-05 22:09:02,639 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-05 22:09:03,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,403 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:03,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,734 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2021-06-05 22:09:03,734 INFO L628 ElimStorePlain]: treesize reduction 352, result has 48.1 percent of original size [2021-06-05 22:09:03,738 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 4 treesize of output 2 [2021-06-05 22:09:03,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,882 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 22:09:03,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:03,885 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 3 treesize of output 1 [2021-06-05 22:09:03,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,026 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 22:09:04,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:04,030 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 6 treesize of output 2 [2021-06-05 22:09:04,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,034 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 6 treesize of output 2 [2021-06-05 22:09:04,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,179 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 22:09:04,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:04,179 INFO L518 ElimStorePlain]: Eliminatee v_prenex_655 vanished before elimination [2021-06-05 22:09:04,183 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 4 treesize of output 2 [2021-06-05 22:09:04,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,187 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 4 treesize of output 2 [2021-06-05 22:09:04,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,319 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 22:09:04,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:04,319 INFO L518 ElimStorePlain]: Eliminatee v_prenex_659 vanished before elimination [2021-06-05 22:09:04,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 7 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 22:09:04,322 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:715, output treesize:267 [2021-06-05 22:09:04,478 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 22:09:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271831880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:04,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:04,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:09:04,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621195607] [2021-06-05 22:09:04,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:04,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:04,707 INFO L87 Difference]: Start difference. First operand 803 states and 2778 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:04,874 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 22:09:05,061 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 22:09:05,225 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 22:09:05,361 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 22:09:05,731 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 22:09:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:05,867 INFO L93 Difference]: Finished difference Result 1027 states and 3412 transitions. [2021-06-05 22:09:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:09:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:05,868 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 22:09:05,868 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 22:09:05,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1685.8ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 22:09:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 803. [2021-06-05 22:09:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.463840399002494) internal successors, (2778), 802 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2778 transitions. [2021-06-05 22:09:05,877 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2778 transitions. Word has length 20 [2021-06-05 22:09:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:05,877 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2778 transitions. [2021-06-05 22:09:05,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2778 transitions. [2021-06-05 22:09:05,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:05,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:05,878 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:06,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13521 [2021-06-05 22:09:06,079 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1969149776, now seen corresponding path program 88 times [2021-06-05 22:09:06,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:06,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759189797] [2021-06-05 22:09:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:06,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:06,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759189797] [2021-06-05 22:09:06,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759189797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:06,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519848631] [2021-06-05 22:09:06,233 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 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 22:09:06,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:09:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:06,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,610 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:06,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,623 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:06,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,629 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:06,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,637 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,641 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:06,642 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,645 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 6 treesize of output 2 [2021-06-05 22:09:06,646 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,650 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:06,651 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,654 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 3 treesize of output 1 [2021-06-05 22:09:06,655 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,662 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,666 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,670 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:06,670 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,674 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:06,675 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,679 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:06,680 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,683 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,687 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:06,688 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,692 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:06,692 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,896 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-05 22:09:06,896 INFO L628 ElimStorePlain]: treesize reduction 130, result has 64.9 percent of original size [2021-06-05 22:09:06,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-06-05 22:09:06,900 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:866, output treesize:230 [2021-06-05 22:09:07,064 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-05 22:09:08,293 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_671, v_prenex_665, ends_with_6, v_prenex_669], 10=[ends_with_2, v_prenex_667]} [2021-06-05 22:09:08,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:08,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,498 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 61 [2021-06-05 22:09:08,498 INFO L628 ElimStorePlain]: treesize reduction 459, result has 29.6 percent of original size [2021-06-05 22:09:08,498 INFO L518 ElimStorePlain]: Eliminatee v_prenex_665 vanished before elimination [2021-06-05 22:09:08,501 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 5 treesize of output 1 [2021-06-05 22:09:08,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,505 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 5 treesize of output 1 [2021-06-05 22:09:08,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,509 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 5 treesize of output 1 [2021-06-05 22:09:08,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:08,580 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 4 treesize of output 2 [2021-06-05 22:09:08,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,584 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 4 treesize of output 2 [2021-06-05 22:09:08,585 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:08,651 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 6 treesize of output 2 [2021-06-05 22:09:08,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,655 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 4 treesize of output 2 [2021-06-05 22:09:08,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,658 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 6 treesize of output 2 [2021-06-05 22:09:08,659 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:08,720 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 5 treesize of output 1 [2021-06-05 22:09:08,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,724 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 5 treesize of output 1 [2021-06-05 22:09:08,724 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:08,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:08,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:09:08,780 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:677, output treesize:136 [2021-06-05 22:09:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:08,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519848631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:08,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:08,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:09:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969290100] [2021-06-05 22:09:08,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:08,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:08,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:08,960 INFO L87 Difference]: Start difference. First operand 803 states and 2778 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:09,620 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-05 22:09:09,799 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:09:10,176 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 22:09:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:10,213 INFO L93 Difference]: Finished difference Result 1097 states and 3621 transitions. [2021-06-05 22:09:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:10,215 INFO L225 Difference]: With dead ends: 1097 [2021-06-05 22:09:10,215 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 22:09:10,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1646.4ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:09:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 22:09:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 806. [2021-06-05 22:09:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.462111801242236) internal successors, (2787), 805 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2787 transitions. [2021-06-05 22:09:10,228 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2787 transitions. Word has length 20 [2021-06-05 22:09:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:10,228 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2787 transitions. [2021-06-05 22:09:10,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2787 transitions. [2021-06-05 22:09:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:10,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:10,230 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:10,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13739,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:10,449 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1115280876, now seen corresponding path program 89 times [2021-06-05 22:09:10,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:10,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28008783] [2021-06-05 22:09:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:10,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28008783] [2021-06-05 22:09:10,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28008783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354744814] [2021-06-05 22:09:10,761 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 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 22:09:10,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:10,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:09:10,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:11,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354744814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:11,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:11,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:09:11,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777224798] [2021-06-05 22:09:11,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:09:11,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:09:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:11,257 INFO L87 Difference]: Start difference. First operand 806 states and 2787 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:09:12,276 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 22:09:12,540 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-05 22:09:12,798 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 22:09:13,170 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 22:09:13,335 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-05 22:09:13,486 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 22:09:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:13,504 INFO L93 Difference]: Finished difference Result 1168 states and 3761 transitions. [2021-06-05 22:09:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:09:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:09:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:13,506 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 22:09:13,506 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 22:09:13,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2450.2ms TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:09:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 22:09:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 818. [2021-06-05 22:09:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.4589963280293756) internal successors, (2826), 817 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2826 transitions. [2021-06-05 22:09:13,515 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2826 transitions. Word has length 20 [2021-06-05 22:09:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:13,515 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2826 transitions. [2021-06-05 22:09:13,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:09:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2826 transitions. [2021-06-05 22:09:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:13,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:13,516 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:13,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13972 [2021-06-05 22:09:13,716 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1072902300, now seen corresponding path program 90 times [2021-06-05 22:09:13,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:13,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684900220] [2021-06-05 22:09:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:13,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:13,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684900220] [2021-06-05 22:09:13,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684900220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:13,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209176592] [2021-06-05 22:09:13,896 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 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 22:09:13,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:13,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:09:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:14,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,325 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:14,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,331 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:14,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,335 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:14,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,340 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 6 treesize of output 2 [2021-06-05 22:09:14,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,345 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:14,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:14,351 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:14,355 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:14,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,363 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:14,364 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,368 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:14,369 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,373 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:14,374 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:14,377 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,380 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 3 treesize of output 1 [2021-06-05 22:09:14,381 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:14,385 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:14,386 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:14,390 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:14,393 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,607 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:09:14,607 INFO L628 ElimStorePlain]: treesize reduction 69, result has 78.9 percent of original size [2021-06-05 22:09:14,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-06-05 22:09:14,611 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:711, output treesize:248 [2021-06-05 22:09:14,795 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-05 22:09:15,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:15,331 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:15,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,617 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-06-05 22:09:15,618 INFO L628 ElimStorePlain]: treesize reduction 245, result has 54.7 percent of original size [2021-06-05 22:09:15,618 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 22:09:15,621 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 3 treesize of output 1 [2021-06-05 22:09:15,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,743 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 22:09:15,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:15,743 INFO L518 ElimStorePlain]: Eliminatee v_prenex_675 vanished before elimination [2021-06-05 22:09:15,747 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 6 treesize of output 2 [2021-06-05 22:09:15,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,751 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 6 treesize of output 2 [2021-06-05 22:09:15,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,870 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 22:09:15,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:15,874 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 4 treesize of output 2 [2021-06-05 22:09:15,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,990 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 22:09:15,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:15,994 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 4 treesize of output 2 [2021-06-05 22:09:15,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,998 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 4 treesize of output 2 [2021-06-05 22:09:15,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:16,112 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 22:09:16,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:16,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 7 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 22:09:16,114 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:572, output treesize:229 [2021-06-05 22:09:16,254 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 22:09:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:16,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209176592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:16,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:16,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:09:16,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865188400] [2021-06-05 22:09:16,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:16,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:16,409 INFO L87 Difference]: Start difference. First operand 818 states and 2826 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:16,538 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 22:09:16,695 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 22:09:17,019 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 22:09:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:17,050 INFO L93 Difference]: Finished difference Result 1001 states and 3341 transitions. [2021-06-05 22:09:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:17,052 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:09:17,052 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 22:09:17,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1051.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 22:09:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 816. [2021-06-05 22:09:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.4613496932515337) internal successors, (2821), 815 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2821 transitions. [2021-06-05 22:09:17,061 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2821 transitions. Word has length 20 [2021-06-05 22:09:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:17,061 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2821 transitions. [2021-06-05 22:09:17,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2821 transitions. [2021-06-05 22:09:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:17,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:17,062 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:17,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13988,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:17,262 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1293529654, now seen corresponding path program 91 times [2021-06-05 22:09:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:17,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626281874] [2021-06-05 22:09:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:17,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626281874] [2021-06-05 22:09:17,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626281874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847242349] [2021-06-05 22:09:17,561 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 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 22:09:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:17,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:09:17,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,887 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:18,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,906 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:18,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,913 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:18,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,926 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:18,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,934 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:18,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,941 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:18,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,948 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:18,948 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,954 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,960 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:18,961 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:18,968 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:18,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,974 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,980 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,986 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,992 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:18,997 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,003 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:19,004 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,010 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,016 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:19,017 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,023 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,029 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:19,030 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,035 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,041 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,047 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,063 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:19,064 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,069 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,074 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:19,075 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,081 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:19,082 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,088 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:19,088 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,093 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:19,094 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,099 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,104 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:19,105 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,110 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,115 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:19,115 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,120 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,125 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,129 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,134 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,139 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,144 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:19,144 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,149 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:19,150 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,155 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:19,156 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,161 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:19,162 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,166 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,170 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,175 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,179 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:19,183 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,523 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 22:09:19,523 INFO L628 ElimStorePlain]: treesize reduction 81, result has 80.1 percent of original size [2021-06-05 22:09:19,527 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 4 treesize of output 2 [2021-06-05 22:09:19,528 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,532 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 3 treesize of output 1 [2021-06-05 22:09:19,533 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,536 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 4 treesize of output 2 [2021-06-05 22:09:19,537 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,540 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 5 treesize of output 1 [2021-06-05 22:09:19,541 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,545 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 3 treesize of output 1 [2021-06-05 22:09:19,546 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,549 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 4 treesize of output 2 [2021-06-05 22:09:19,550 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,554 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 4 treesize of output 2 [2021-06-05 22:09:19,555 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,559 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 5 treesize of output 1 [2021-06-05 22:09:19,560 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,563 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 4 treesize of output 2 [2021-06-05 22:09:19,564 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,567 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 4 treesize of output 2 [2021-06-05 22:09:19,568 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,719 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 22:09:19,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:19,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:09:19,724 INFO L247 ElimStorePlain]: Needed 61 recursive calls to eliminate 3 variables, input treesize:2296, output treesize:255 [2021-06-05 22:09:19,969 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 22:09:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:20,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847242349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:20,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:20,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:09:20,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383454363] [2021-06-05 22:09:20,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:20,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:20,214 INFO L87 Difference]: Start difference. First operand 816 states and 2821 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:20,882 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-05 22:09:21,281 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 22:09:21,569 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 22:09:21,870 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 22:09:22,072 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-06-05 22:09:22,355 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 22:09:22,490 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 22:09:22,756 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-06-05 22:09:23,031 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-05 22:09:23,281 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-06-05 22:09:23,485 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-06-05 22:09:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:23,510 INFO L93 Difference]: Finished difference Result 1356 states and 4271 transitions. [2021-06-05 22:09:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:09:23,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:23,512 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 22:09:23,512 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 22:09:23,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 3690.5ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:09:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 22:09:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 825. [2021-06-05 22:09:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.467233009708738) internal successors, (2857), 824 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2857 transitions. [2021-06-05 22:09:23,522 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2857 transitions. Word has length 20 [2021-06-05 22:09:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:23,523 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2857 transitions. [2021-06-05 22:09:23,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2857 transitions. [2021-06-05 22:09:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:23,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:23,524 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:23,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14243,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:23,724 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash -396413250, now seen corresponding path program 92 times [2021-06-05 22:09:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:23,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379549822] [2021-06-05 22:09:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:23,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:23,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379549822] [2021-06-05 22:09:23,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379549822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:23,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541719290] [2021-06-05 22:09:23,992 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 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 22:09:24,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:24,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:24,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:09:24,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:24,575 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_683], 15=[ends_with_10]} [2021-06-05 22:09:24,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:24,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:24,582 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:24,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:24,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:24,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:24,590 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:24,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:24,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:24,596 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:24,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:24,602 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 3 treesize of output 1 [2021-06-05 22:09:24,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,110 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 117 [2021-06-05 22:09:25,110 INFO L628 ElimStorePlain]: treesize reduction 326, result has 62.5 percent of original size [2021-06-05 22:09:25,115 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 6 treesize of output 2 [2021-06-05 22:09:25,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,121 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 6 treesize of output 2 [2021-06-05 22:09:25,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,128 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 4 treesize of output 2 [2021-06-05 22:09:25,129 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,134 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 3 treesize of output 1 [2021-06-05 22:09:25,135 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,140 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 4 treesize of output 2 [2021-06-05 22:09:25,140 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,145 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 4 treesize of output 2 [2021-06-05 22:09:25,146 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,151 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 4 treesize of output 2 [2021-06-05 22:09:25,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,157 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 6 treesize of output 2 [2021-06-05 22:09:25,158 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,163 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 6 treesize of output 2 [2021-06-05 22:09:25,163 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,573 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2021-06-05 22:09:25,573 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-06-05 22:09:25,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 12 xjuncts. [2021-06-05 22:09:25,586 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:972, output treesize:490 [2021-06-05 22:09:25,906 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 113 [2021-06-05 22:09:26,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:26,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:26,780 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:26,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:26,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:26,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:26,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:26,795 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:26,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,303 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 119 [2021-06-05 22:09:27,303 INFO L628 ElimStorePlain]: treesize reduction 591, result has 45.0 percent of original size [2021-06-05 22:09:27,310 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 4 treesize of output 2 [2021-06-05 22:09:27,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,316 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 4 treesize of output 2 [2021-06-05 22:09:27,317 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,520 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 22:09:27,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:27,526 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 6 treesize of output 2 [2021-06-05 22:09:27,527 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,730 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 22:09:27,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:27,735 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 3 treesize of output 1 [2021-06-05 22:09:27,736 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,945 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 22:09:27,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:27,951 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 4 treesize of output 2 [2021-06-05 22:09:27,952 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,150 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:09:28,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:28,155 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 3 treesize of output 1 [2021-06-05 22:09:28,156 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,351 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:09:28,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:28,357 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 4 treesize of output 2 [2021-06-05 22:09:28,358 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,555 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:09:28,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:28,567 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 6 treesize of output 2 [2021-06-05 22:09:28,568 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,573 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 6 treesize of output 2 [2021-06-05 22:09:28,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,767 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:09:28,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:28,773 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 4 treesize of output 2 [2021-06-05 22:09:28,774 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,779 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 4 treesize of output 2 [2021-06-05 22:09:28,780 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,965 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 22:09:28,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:28,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 9 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 22:09:28,971 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 16 variables, input treesize:1235, output treesize:364 [2021-06-05 22:09:29,159 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 22:09:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:29,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541719290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:29,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:29,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:09:29,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713787224] [2021-06-05 22:09:29,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:29,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:29,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:29,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:29,459 INFO L87 Difference]: Start difference. First operand 825 states and 2857 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:29,636 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 22:09:29,781 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 22:09:30,031 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 22:09:30,233 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-05 22:09:30,387 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 22:09:31,082 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 123 [2021-06-05 22:09:31,428 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 22:09:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:31,464 INFO L93 Difference]: Finished difference Result 1105 states and 3641 transitions. [2021-06-05 22:09:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:09:31,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:31,466 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 22:09:31,466 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 22:09:31,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2670.3ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:09:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 22:09:31,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 829. [2021-06-05 22:09:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.464975845410628) internal successors, (2869), 828 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2869 transitions. [2021-06-05 22:09:31,475 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2869 transitions. Word has length 20 [2021-06-05 22:09:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:31,475 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2869 transitions. [2021-06-05 22:09:31,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2869 transitions. [2021-06-05 22:09:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:31,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:31,476 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:31,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14691 [2021-06-05 22:09:31,677 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash 69319048, now seen corresponding path program 93 times [2021-06-05 22:09:31,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:31,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949691195] [2021-06-05 22:09:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:31,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949691195] [2021-06-05 22:09:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949691195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081110516] [2021-06-05 22:09:31,930 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 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 22:09:31,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:31,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:09:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:32,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:32,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:32,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,316 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:32,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,323 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:32,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,329 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:32,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,335 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:32,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:32,342 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,348 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:32,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,354 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:32,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,360 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:32,361 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:32,367 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,372 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:32,373 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,378 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:32,379 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,384 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:32,385 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:32,390 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,417 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:32,418 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,425 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:32,426 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,433 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:32,434 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:32,441 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,447 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:32,448 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,454 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:32,455 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,460 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:32,460 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,465 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:32,466 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,470 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:32,471 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:32,475 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:32,476 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,857 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 22:09:32,857 INFO L628 ElimStorePlain]: treesize reduction 86, result has 82.4 percent of original size [2021-06-05 22:09:32,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:09:32,862 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1231, output treesize:404 [2021-06-05 22:09:33,178 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2021-06-05 22:09:34,286 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_710], 6=[ends_with_6], 10=[v_prenex_709], 55=[ends_with_10]} [2021-06-05 22:09:34,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,296 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:34,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:34,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,311 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:34,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:34,319 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:34,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:34,327 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:34,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,655 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 77 [2021-06-05 22:09:34,656 INFO L628 ElimStorePlain]: treesize reduction 738, result has 24.5 percent of original size [2021-06-05 22:09:34,659 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 5 treesize of output 1 [2021-06-05 22:09:34,660 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,664 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 4 treesize of output 2 [2021-06-05 22:09:34,665 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,669 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 6 treesize of output 2 [2021-06-05 22:09:34,670 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,673 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 4 treesize of output 2 [2021-06-05 22:09:34,674 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,776 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 22:09:34,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:34,780 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 3 treesize of output 1 [2021-06-05 22:09:34,780 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,784 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 5 treesize of output 1 [2021-06-05 22:09:34,785 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:34,885 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 5 treesize of output 1 [2021-06-05 22:09:34,886 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,889 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 6 treesize of output 2 [2021-06-05 22:09:34,890 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,893 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 4 treesize of output 2 [2021-06-05 22:09:34,894 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,897 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 5 treesize of output 1 [2021-06-05 22:09:34,898 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:34,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:09:34,989 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 13 variables, input treesize:1189, output treesize:148 [2021-06-05 22:09:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:35,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081110516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:35,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:35,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:09:35,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708225347] [2021-06-05 22:09:35,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:35,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:35,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:35,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:35,269 INFO L87 Difference]: Start difference. First operand 829 states and 2869 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:35,915 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-06-05 22:09:36,328 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 22:09:36,534 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 22:09:36,734 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-06-05 22:09:36,976 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 22:09:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:36,985 INFO L93 Difference]: Finished difference Result 1124 states and 3695 transitions. [2021-06-05 22:09:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:09:36,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:36,987 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 22:09:36,987 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 22:09:36,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2351.4ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:09:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 22:09:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 838. [2021-06-05 22:09:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4647550776583036) internal successors, (2900), 837 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2900 transitions. [2021-06-05 22:09:36,996 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2900 transitions. Word has length 20 [2021-06-05 22:09:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:36,996 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2900 transitions. [2021-06-05 22:09:36,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2900 transitions. [2021-06-05 22:09:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:36,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:36,998 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:37,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14995 [2021-06-05 22:09:37,198 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1254401028, now seen corresponding path program 94 times [2021-06-05 22:09:37,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:37,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077178649] [2021-06-05 22:09:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:37,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:37,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077178649] [2021-06-05 22:09:37,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077178649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:37,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342092866] [2021-06-05 22:09:37,442 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 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 22:09:37,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:37,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:09:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:37,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,979 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:37,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:37,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,985 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:37,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:37,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,991 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:37,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:37,998 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:37,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,004 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:38,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,010 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:38,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,016 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:38,017 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,022 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:38,023 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,029 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:38,030 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,035 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:38,035 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,040 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:38,041 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,045 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:38,046 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,051 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:38,052 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,057 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:38,058 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,062 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:38,063 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,067 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:38,068 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,072 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:38,073 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,077 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:38,078 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,082 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:38,083 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:38,087 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:38,087 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,255 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 22:09:38,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:38,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:09:38,260 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:885, output treesize:358 [2021-06-05 22:09:38,564 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 22:09:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:39,506 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:39,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:39,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:39,513 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:39,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:39,521 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:39,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,836 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 86 [2021-06-05 22:09:39,837 INFO L628 ElimStorePlain]: treesize reduction 422, result has 39.0 percent of original size [2021-06-05 22:09:39,841 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 4 treesize of output 2 [2021-06-05 22:09:39,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,984 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 22:09:39,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:39,988 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 4 treesize of output 2 [2021-06-05 22:09:39,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,116 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:09:40,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_721 vanished before elimination [2021-06-05 22:09:40,121 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 4 treesize of output 2 [2021-06-05 22:09:40,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,247 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 22:09:40,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,251 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 3 treesize of output 1 [2021-06-05 22:09:40,252 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,375 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 22:09:40,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,379 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 5 treesize of output 1 [2021-06-05 22:09:40,380 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,500 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 22:09:40,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,501 INFO L518 ElimStorePlain]: Eliminatee v_prenex_725 vanished before elimination [2021-06-05 22:09:40,501 INFO L518 ElimStorePlain]: Eliminatee v_prenex_717 vanished before elimination [2021-06-05 22:09:40,501 INFO L518 ElimStorePlain]: Eliminatee v_prenex_716 vanished before elimination [2021-06-05 22:09:40,505 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 6 treesize of output 2 [2021-06-05 22:09:40,506 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,622 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 22:09:40,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,626 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 3 treesize of output 1 [2021-06-05 22:09:40,627 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,742 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 22:09:40,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:09:40,745 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 18 variables, input treesize:767, output treesize:201 [2021-06-05 22:09:40,866 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 22:09:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:41,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342092866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:41,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:41,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:09:41,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619163112] [2021-06-05 22:09:41,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:41,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:41,094 INFO L87 Difference]: Start difference. First operand 838 states and 2900 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:09:41,687 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-06-05 22:09:41,932 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 22:09:42,121 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-06-05 22:09:42,333 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 22:09:42,530 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-06-05 22:09:42,728 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-05 22:09:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:42,740 INFO L93 Difference]: Finished difference Result 1138 states and 3723 transitions. [2021-06-05 22:09:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:09:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:09:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:42,742 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 22:09:42,742 INFO L226 Difference]: Without dead ends: 1063 [2021-06-05 22:09:42,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2223.7ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:09:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-05 22:09:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 834. [2021-06-05 22:09:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.46218487394958) internal successors, (2884), 833 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2884 transitions. [2021-06-05 22:09:42,756 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2884 transitions. Word has length 20 [2021-06-05 22:09:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:42,756 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 2884 transitions. [2021-06-05 22:09:42,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:09:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2884 transitions. [2021-06-05 22:09:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:42,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:42,757 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:42,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15163,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:42,977 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1280513328, now seen corresponding path program 95 times [2021-06-05 22:09:42,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:42,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150910260] [2021-06-05 22:09:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:43,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150910260] [2021-06-05 22:09:43,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150910260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636907596] [2021-06-05 22:09:43,288 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 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 22:09:43,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:09:43,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:43,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:09:43,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:43,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636907596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:43,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:43,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:09:43,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474212196] [2021-06-05 22:09:43,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:09:43,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:43,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:09:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:43,840 INFO L87 Difference]: Start difference. First operand 834 states and 2884 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:09:44,074 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 22:09:44,297 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 22:09:45,512 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 22:09:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:45,844 INFO L93 Difference]: Finished difference Result 1181 states and 3853 transitions. [2021-06-05 22:09:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:09:45,844 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:09:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:45,846 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 22:09:45,846 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 22:09:45,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2325.0ms TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:09:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 22:09:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 835. [2021-06-05 22:09:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.464028776978417) internal successors, (2889), 834 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2889 transitions. [2021-06-05 22:09:45,862 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2889 transitions. Word has length 20 [2021-06-05 22:09:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:45,862 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2889 transitions. [2021-06-05 22:09:45,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:09:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2889 transitions. [2021-06-05 22:09:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:45,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:45,863 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:46,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15373 [2021-06-05 22:09:46,064 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:46,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1502434524, now seen corresponding path program 96 times [2021-06-05 22:09:46,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:46,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156044679] [2021-06-05 22:09:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:46,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:46,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156044679] [2021-06-05 22:09:46,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156044679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:46,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514970749] [2021-06-05 22:09:46,398 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 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 22:09:46,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:46,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:09:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:46,638 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 22:09:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,099 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:47,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,106 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:47,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,113 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:47,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,120 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:47,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,127 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:47,127 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,517 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 96 [2021-06-05 22:09:47,518 INFO L628 ElimStorePlain]: treesize reduction 479, result has 41.9 percent of original size [2021-06-05 22:09:47,522 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 6 treesize of output 2 [2021-06-05 22:09:47,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,528 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 4 treesize of output 2 [2021-06-05 22:09:47,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,682 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:09:47,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:47,687 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 6 treesize of output 2 [2021-06-05 22:09:47,688 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,692 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 4 treesize of output 2 [2021-06-05 22:09:47,693 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,842 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 22:09:47,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:47,847 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 5 treesize of output 1 [2021-06-05 22:09:47,848 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,852 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 3 treesize of output 1 [2021-06-05 22:09:47,853 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,996 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:09:47,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:48,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-06-05 22:09:48,007 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:979, output treesize:317 [2021-06-05 22:09:48,311 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2021-06-05 22:09:48,725 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 108 [2021-06-05 22:09:49,035 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-06-05 22:09:49,805 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_750, v_prenex_748, v_prenex_747], 6=[v_prenex_760, v_prenex_762, v_prenex_751, v_prenex_753, v_prenex_752, v_prenex_755, v_prenex_754, v_prenex_757, v_prenex_756, v_prenex_758, v_prenex_749], 10=[ends_with_2, ends_with_10]} [2021-06-05 22:09:49,815 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 6 treesize of output 2 [2021-06-05 22:09:49,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,134 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 96 [2021-06-05 22:09:50,135 INFO L628 ElimStorePlain]: treesize reduction 810, result has 23.2 percent of original size [2021-06-05 22:09:50,140 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 3 treesize of output 1 [2021-06-05 22:09:50,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,241 INFO L518 ElimStorePlain]: Eliminatee v_prenex_747 vanished before elimination [2021-06-05 22:09:50,245 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 3 treesize of output 1 [2021-06-05 22:09:50,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,348 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 3 treesize of output 1 [2021-06-05 22:09:50,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,449 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 5 treesize of output 1 [2021-06-05 22:09:50,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,544 INFO L518 ElimStorePlain]: Eliminatee v_prenex_753 vanished before elimination [2021-06-05 22:09:50,549 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 4 treesize of output 2 [2021-06-05 22:09:50,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,646 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 6 treesize of output 2 [2021-06-05 22:09:50,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_754 vanished before elimination [2021-06-05 22:09:50,740 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 3 treesize of output 1 [2021-06-05 22:09:50,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,830 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 5 treesize of output 1 [2021-06-05 22:09:50,831 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:50,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:50,921 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 6 treesize of output 2 [2021-06-05 22:09:50,921 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:51,008 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 5 treesize of output 1 [2021-06-05 22:09:51,009 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,013 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 5 treesize of output 1 [2021-06-05 22:09:51,014 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:51,097 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 4 treesize of output 2 [2021-06-05 22:09:51,098 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:51,181 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 4 treesize of output 2 [2021-06-05 22:09:51,182 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:51,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 16 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:09:51,261 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 27 variables, input treesize:1061, output treesize:148 [2021-06-05 22:09:51,380 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 22:09:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514970749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:51,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:09:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592731486] [2021-06-05 22:09:51,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:51,462 INFO L87 Difference]: Start difference. First operand 835 states and 2889 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:09:52,557 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 113 [2021-06-05 22:09:52,768 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 22:09:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:52,945 INFO L93 Difference]: Finished difference Result 1080 states and 3543 transitions. [2021-06-05 22:09:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:09:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:09:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:52,947 INFO L225 Difference]: With dead ends: 1080 [2021-06-05 22:09:52,947 INFO L226 Difference]: Without dead ends: 1035 [2021-06-05 22:09:52,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2302.0ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-05 22:09:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 841. [2021-06-05 22:09:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.469047619047619) internal successors, (2914), 840 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2914 transitions. [2021-06-05 22:09:52,956 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2914 transitions. Word has length 20 [2021-06-05 22:09:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:52,956 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2914 transitions. [2021-06-05 22:09:52,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:09:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2914 transitions. [2021-06-05 22:09:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:52,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:52,957 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:53,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15394,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:53,158 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 745408156, now seen corresponding path program 97 times [2021-06-05 22:09:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:53,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116864424] [2021-06-05 22:09:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:53,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:53,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116864424] [2021-06-05 22:09:53,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116864424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:53,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398011931] [2021-06-05 22:09:53,357 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 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 22:09:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:09:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:53,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,735 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:53,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,741 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:53,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,746 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:53,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,751 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:53,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,757 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:53,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:53,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,768 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:53,769 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,773 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:53,774 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,779 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:53,780 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,784 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:53,785 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,807 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:53,808 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,813 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:53,813 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,818 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:53,819 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:53,824 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,828 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:53,829 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,833 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:53,834 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,838 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:53,839 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,844 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:53,844 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,849 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:53,849 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:53,853 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:09:53,854 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:54,128 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 22:09:54,128 INFO L628 ElimStorePlain]: treesize reduction 73, result has 79.6 percent of original size [2021-06-05 22:09:54,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:09:54,133 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:881, output treesize:285 [2021-06-05 22:09:54,427 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-06-05 22:09:55,678 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_2, v_prenex_786], 3=[v_prenex_779], 10=[v_prenex_783, ends_with_10], 36=[v_prenex_780]} [2021-06-05 22:09:55,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:55,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:55,686 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:55,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:55,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:55,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:55,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:55,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:55,702 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:55,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:55,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:55,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:55,710 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:55,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:55,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:55,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:55,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:55,724 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,021 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-06-05 22:09:56,022 INFO L628 ElimStorePlain]: treesize reduction 664, result has 30.2 percent of original size [2021-06-05 22:09:56,026 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 4 treesize of output 2 [2021-06-05 22:09:56,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,144 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 22:09:56,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:56,149 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 5 treesize of output 1 [2021-06-05 22:09:56,150 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,154 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 5 treesize of output 1 [2021-06-05 22:09:56,155 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,159 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 6 treesize of output 2 [2021-06-05 22:09:56,160 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,163 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 5 treesize of output 1 [2021-06-05 22:09:56,164 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,276 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 22:09:56,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:56,280 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 6 treesize of output 2 [2021-06-05 22:09:56,281 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,390 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 22:09:56,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:56,395 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 3 treesize of output 1 [2021-06-05 22:09:56,396 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,399 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 3 treesize of output 1 [2021-06-05 22:09:56,400 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,514 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 22:09:56,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:56,533 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 4 treesize of output 2 [2021-06-05 22:09:56,534 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,539 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 6 treesize of output 2 [2021-06-05 22:09:56,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,544 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 5 treesize of output 1 [2021-06-05 22:09:56,545 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,550 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 6 treesize of output 2 [2021-06-05 22:09:56,551 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:56,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:56,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:09:56,654 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 19 variables, input treesize:1153, output treesize:181 [2021-06-05 22:09:56,799 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 22:09:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:56,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398011931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:56,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:56,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:09:56,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466116629] [2021-06-05 22:09:56,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:56,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:56,944 INFO L87 Difference]: Start difference. First operand 841 states and 2914 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:57,770 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-05 22:09:57,933 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 22:09:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:58,169 INFO L93 Difference]: Finished difference Result 1155 states and 3723 transitions. [2021-06-05 22:09:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:09:58,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:58,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:58,171 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 22:09:58,171 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 22:09:58,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1855.5ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:09:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 22:09:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 847. [2021-06-05 22:09:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.4775413711583925) internal successors, (2942), 846 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2942 transitions. [2021-06-05 22:09:58,184 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2942 transitions. Word has length 20 [2021-06-05 22:09:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:58,184 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2942 transitions. [2021-06-05 22:09:58,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2942 transitions. [2021-06-05 22:09:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:58,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:58,185 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:58,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15729 [2021-06-05 22:09:58,386 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:58,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1097783846, now seen corresponding path program 98 times [2021-06-05 22:09:58,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:58,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214813976] [2021-06-05 22:09:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:58,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:58,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214813976] [2021-06-05 22:09:58,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214813976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:58,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687381357] [2021-06-05 22:09:58,591 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 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 22:09:58,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:58,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:09:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:59,230 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:09:59,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:59,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:59,236 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 22:09:59,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:59,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:59,242 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:09:59,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:59,248 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:09:59,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,506 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-05 22:09:59,507 INFO L628 ElimStorePlain]: treesize reduction 216, result has 54.9 percent of original size [2021-06-05 22:09:59,511 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 6 treesize of output 2 [2021-06-05 22:09:59,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,516 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 4 treesize of output 2 [2021-06-05 22:09:59,516 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,628 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 22:09:59,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:59,632 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 3 treesize of output 1 [2021-06-05 22:09:59,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,637 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 3 treesize of output 1 [2021-06-05 22:09:59,638 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,744 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 22:09:59,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:59,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-06-05 22:09:59,751 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:597, output treesize:247 [2021-06-05 22:10:01,696 INFO L446 ElimStorePlain]: Different costs {10=[ends_with_2], 15=[ends_with_10], 21=[v_prenex_794], 28=[v_prenex_795]} [2021-06-05 22:10:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:01,705 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:01,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:01,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:01,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:01,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:01,727 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:01,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:01,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:01,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:01,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:01,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:01,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:10:01,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,218 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 105 [2021-06-05 22:10:02,218 INFO L628 ElimStorePlain]: treesize reduction 1132, result has 21.9 percent of original size [2021-06-05 22:10:02,224 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 3 treesize of output 1 [2021-06-05 22:10:02,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,229 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 3 treesize of output 1 [2021-06-05 22:10:02,230 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,371 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:10:02,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:02,376 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 5 treesize of output 1 [2021-06-05 22:10:02,377 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,382 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 6 treesize of output 2 [2021-06-05 22:10:02,383 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,388 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 6 treesize of output 2 [2021-06-05 22:10:02,389 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,394 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 6 treesize of output 2 [2021-06-05 22:10:02,395 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,399 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 5 treesize of output 1 [2021-06-05 22:10:02,400 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,527 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:10:02,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:02,532 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 6 treesize of output 2 [2021-06-05 22:10:02,533 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,537 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 4 treesize of output 2 [2021-06-05 22:10:02,538 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,542 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 6 treesize of output 2 [2021-06-05 22:10:02,543 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,548 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 3 treesize of output 1 [2021-06-05 22:10:02,549 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,553 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 6 treesize of output 2 [2021-06-05 22:10:02,554 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,670 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 22:10:02,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:02,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:10:02,675 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 15 variables, input treesize:1681, output treesize:209 [2021-06-05 22:10:02,842 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 22:10:02,989 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-05 22:10:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:03,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687381357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:03,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:03,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:10:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892483660] [2021-06-05 22:10:03,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:10:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:10:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:03,095 INFO L87 Difference]: Start difference. First operand 847 states and 2942 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:03,550 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 22:10:03,894 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 22:10:04,358 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 22:10:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:04,463 INFO L93 Difference]: Finished difference Result 1122 states and 3661 transitions. [2021-06-05 22:10:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:10:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:10:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:04,465 INFO L225 Difference]: With dead ends: 1122 [2021-06-05 22:10:04,465 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 22:10:04,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1880.7ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:10:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 22:10:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 862. [2021-06-05 22:10:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.491289198606272) internal successors, (3006), 861 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3006 transitions. [2021-06-05 22:10:04,477 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3006 transitions. Word has length 20 [2021-06-05 22:10:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:04,477 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 3006 transitions. [2021-06-05 22:10:04,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3006 transitions. [2021-06-05 22:10:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:04,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:04,478 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:04,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15910 [2021-06-05 22:10:04,685 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -779303424, now seen corresponding path program 99 times [2021-06-05 22:10:04,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:04,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557364161] [2021-06-05 22:10:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:05,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:05,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557364161] [2021-06-05 22:10:05,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557364161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:05,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090205081] [2021-06-05 22:10:05,010 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 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 22:10:05,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:05,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:05,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:10:05,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:05,288 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 22:10:05,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,608 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:10:05,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,622 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:10:05,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,632 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 22:10:05,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,641 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:05,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,122 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 116 [2021-06-05 22:10:06,123 INFO L628 ElimStorePlain]: treesize reduction 442, result has 50.9 percent of original size [2021-06-05 22:10:06,130 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 6 treesize of output 2 [2021-06-05 22:10:06,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,147 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 6 treesize of output 2 [2021-06-05 22:10:06,147 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,356 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 22:10:06,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:06,361 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 6 treesize of output 2 [2021-06-05 22:10:06,362 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,368 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 4 treesize of output 2 [2021-06-05 22:10:06,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,571 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 22:10:06,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:06,577 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 6 treesize of output 2 [2021-06-05 22:10:06,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,583 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 6 treesize of output 2 [2021-06-05 22:10:06,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,793 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:10:06,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:06,798 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 3 treesize of output 1 [2021-06-05 22:10:06,799 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,804 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 5 treesize of output 1 [2021-06-05 22:10:06,805 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,003 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:10:07,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:07,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 5 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:10:07,015 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:1027, output treesize:417 [2021-06-05 22:10:07,371 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2021-06-05 22:10:07,738 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 84 [2021-06-05 22:10:10,111 INFO L446 ElimStorePlain]: Different costs {10=[ends_with_10], 15=[ends_with_6], 21=[v_prenex_821], 28=[v_prenex_823]} [2021-06-05 22:10:10,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:10,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:10,120 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:10,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:10,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:10,129 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:10,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:10,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:10,138 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:10:10,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:10,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:10,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:10,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,511 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 93 [2021-06-05 22:10:10,512 INFO L628 ElimStorePlain]: treesize reduction 755, result has 24.4 percent of original size [2021-06-05 22:10:10,525 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 3 treesize of output 1 [2021-06-05 22:10:10,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,531 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 5 treesize of output 1 [2021-06-05 22:10:10,531 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,634 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:10:10,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:10,639 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 6 treesize of output 2 [2021-06-05 22:10:10,640 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,644 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 5 treesize of output 1 [2021-06-05 22:10:10,645 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,649 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 5 treesize of output 1 [2021-06-05 22:10:10,650 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,653 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 4 treesize of output 2 [2021-06-05 22:10:10,654 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:10,751 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 4 treesize of output 2 [2021-06-05 22:10:10,752 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,756 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 6 treesize of output 2 [2021-06-05 22:10:10,757 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,761 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 5 treesize of output 1 [2021-06-05 22:10:10,762 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,765 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 6 treesize of output 2 [2021-06-05 22:10:10,766 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:10,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:10,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:10:10,857 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:1213, output treesize:152 [2021-06-05 22:10:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:11,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090205081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:11,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:11,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:10:11,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792126434] [2021-06-05 22:10:11,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:10:11,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:10:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:11,127 INFO L87 Difference]: Start difference. First operand 862 states and 3006 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:11,864 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 120 [2021-06-05 22:10:12,262 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 22:10:12,468 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-05 22:10:12,649 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-06-05 22:10:12,865 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-05 22:10:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:12,879 INFO L93 Difference]: Finished difference Result 1155 states and 3775 transitions. [2021-06-05 22:10:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:10:12,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:10:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:12,881 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 22:10:12,881 INFO L226 Difference]: Without dead ends: 1095 [2021-06-05 22:10:12,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2641.6ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:10:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-05 22:10:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 867. [2021-06-05 22:10:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.4942263279445727) internal successors, (3026), 866 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 3026 transitions. [2021-06-05 22:10:12,891 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 3026 transitions. Word has length 20 [2021-06-05 22:10:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:12,891 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 3026 transitions. [2021-06-05 22:10:12,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 3026 transitions. [2021-06-05 22:10:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:12,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:12,892 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:13,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16168 [2021-06-05 22:10:13,093 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash 405778556, now seen corresponding path program 100 times [2021-06-05 22:10:13,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:13,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655445388] [2021-06-05 22:10:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:13,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:13,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655445388] [2021-06-05 22:10:13,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655445388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:13,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647973667] [2021-06-05 22:10:13,376 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 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 22:10:13,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:13,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:10:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:13,844 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:13,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:13,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:13,851 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:13,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:13,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:13,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:13,869 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:13,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:13,875 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:13,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,280 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-06-05 22:10:14,281 INFO L628 ElimStorePlain]: treesize reduction 475, result has 42.9 percent of original size [2021-06-05 22:10:14,285 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 5 treesize of output 1 [2021-06-05 22:10:14,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,290 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 5 treesize of output 1 [2021-06-05 22:10:14,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,470 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 22:10:14,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:14,474 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 3 treesize of output 1 [2021-06-05 22:10:14,475 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,479 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 3 treesize of output 1 [2021-06-05 22:10:14,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,653 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 22:10:14,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:14,658 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 6 treesize of output 2 [2021-06-05 22:10:14,659 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,663 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 6 treesize of output 2 [2021-06-05 22:10:14,663 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,841 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 22:10:14,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:14,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:10:14,846 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:989, output treesize:329 [2021-06-05 22:10:15,034 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:10:17,305 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_6], 6=[v_prenex_835], 21=[ends_with_10], 36=[v_prenex_834]} [2021-06-05 22:10:17,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:17,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,325 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:17,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:17,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,380 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:17,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:17,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,397 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:17,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:17,407 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:17,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,927 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 108 [2021-06-05 22:10:17,927 INFO L628 ElimStorePlain]: treesize reduction 1169, result has 23.9 percent of original size [2021-06-05 22:10:17,932 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 3 treesize of output 1 [2021-06-05 22:10:17,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,938 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 4 treesize of output 2 [2021-06-05 22:10:17,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,943 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 6 treesize of output 2 [2021-06-05 22:10:17,944 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,949 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 3 treesize of output 1 [2021-06-05 22:10:17,950 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,954 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 6 treesize of output 2 [2021-06-05 22:10:17,955 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,960 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 4 treesize of output 2 [2021-06-05 22:10:17,961 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,130 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 22:10:18,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:18,136 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 3 treesize of output 1 [2021-06-05 22:10:18,137 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,141 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 3 treesize of output 1 [2021-06-05 22:10:18,142 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,307 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 22:10:18,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:18,312 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 6 treesize of output 2 [2021-06-05 22:10:18,313 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,318 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 4 treesize of output 2 [2021-06-05 22:10:18,319 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,323 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 5 treesize of output 1 [2021-06-05 22:10:18,324 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,329 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 5 treesize of output 1 [2021-06-05 22:10:18,330 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,334 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 6 treesize of output 2 [2021-06-05 22:10:18,335 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,339 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 4 treesize of output 2 [2021-06-05 22:10:18,340 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,488 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:10:18,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:18,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:10:18,493 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 13 variables, input treesize:1875, output treesize:245 [2021-06-05 22:10:18,749 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 22:10:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:19,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647973667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:19,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:19,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:10:19,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346463047] [2021-06-05 22:10:19,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:10:19,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:10:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:19,053 INFO L87 Difference]: Start difference. First operand 867 states and 3026 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:20,117 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 22:10:20,453 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 22:10:20,694 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-05 22:10:21,036 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 22:10:21,349 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2021-06-05 22:10:21,582 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-06-05 22:10:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:21,606 INFO L93 Difference]: Finished difference Result 1313 states and 4250 transitions. [2021-06-05 22:10:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:10:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:21,608 INFO L225 Difference]: With dead ends: 1313 [2021-06-05 22:10:21,608 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 22:10:21,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2944.5ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:10:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 22:10:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 864. [2021-06-05 22:10:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4936268829663963) internal successors, (3015), 863 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 3015 transitions. [2021-06-05 22:10:21,619 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 3015 transitions. Word has length 20 [2021-06-05 22:10:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:21,619 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 3015 transitions. [2021-06-05 22:10:21,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 3015 transitions. [2021-06-05 22:10:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:21,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:21,621 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:21,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16378 [2021-06-05 22:10:21,821 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:21,821 INFO L82 PathProgramCache]: Analyzing trace with hash -552157638, now seen corresponding path program 101 times [2021-06-05 22:10:21,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:21,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225177887] [2021-06-05 22:10:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:22,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:22,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225177887] [2021-06-05 22:10:22,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225177887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:22,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296004818] [2021-06-05 22:10:22,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:10:22,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:22,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:22,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:10:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:22,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296004818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:22,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:22,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:10:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969853850] [2021-06-05 22:10:22,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:10:22,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:22,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:10:22,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:22,654 INFO L87 Difference]: Start difference. First operand 864 states and 3015 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:10:23,261 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 22:10:23,445 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-06-05 22:10:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:23,491 INFO L93 Difference]: Finished difference Result 1002 states and 3396 transitions. [2021-06-05 22:10:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:10:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:23,493 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 22:10:23,493 INFO L226 Difference]: Without dead ends: 987 [2021-06-05 22:10:23,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1132.2ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-05 22:10:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 866. [2021-06-05 22:10:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.491329479768786) internal successors, (3020), 865 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3020 transitions. [2021-06-05 22:10:23,502 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3020 transitions. Word has length 20 [2021-06-05 22:10:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:23,502 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3020 transitions. [2021-06-05 22:10:23,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:10:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3020 transitions. [2021-06-05 22:10:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:23,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:23,503 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:23,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16609 [2021-06-05 22:10:23,705 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:23,705 INFO L82 PathProgramCache]: Analyzing trace with hash 168965840, now seen corresponding path program 102 times [2021-06-05 22:10:23,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:23,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896743533] [2021-06-05 22:10:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:23,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:23,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896743533] [2021-06-05 22:10:23,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896743533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:23,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472066855] [2021-06-05 22:10:23,903 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 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 22:10:23,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:23,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:23,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:10:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:24,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,299 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:24,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,304 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:10:24,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:24,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,315 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 6 treesize of output 2 [2021-06-05 22:10:24,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,319 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 4 treesize of output 2 [2021-06-05 22:10:24,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:24,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,328 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 3 treesize of output 1 [2021-06-05 22:10:24,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,333 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:24,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:24,338 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:24,342 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,346 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:10:24,347 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:24,352 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,356 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:24,357 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,361 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:24,362 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:24,367 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:24,370 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,588 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 22:10:24,589 INFO L628 ElimStorePlain]: treesize reduction 106, result has 70.2 percent of original size [2021-06-05 22:10:24,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-06-05 22:10:24,592 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:710, output treesize:242 [2021-06-05 22:10:24,777 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 22:10:25,741 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_850, ends_with_2, v_prenex_843, v_prenex_842, ends_with_6, v_prenex_844, v_prenex_855, v_prenex_847, v_prenex_846, v_prenex_848], 10=[v_prenex_853]} [2021-06-05 22:10:25,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:25,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:25,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,110 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 102 [2021-06-05 22:10:26,111 INFO L628 ElimStorePlain]: treesize reduction 432, result has 44.0 percent of original size [2021-06-05 22:10:26,116 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 4 treesize of output 2 [2021-06-05 22:10:26,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,121 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 4 treesize of output 2 [2021-06-05 22:10:26,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,266 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 22:10:26,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:26,271 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 4 treesize of output 2 [2021-06-05 22:10:26,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,571 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-06-05 22:10:26,572 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 22:10:26,577 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 4 treesize of output 2 [2021-06-05 22:10:26,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,716 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:10:26,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:26,721 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 4 treesize of output 2 [2021-06-05 22:10:26,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,861 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:10:26,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:26,861 INFO L518 ElimStorePlain]: Eliminatee v_prenex_844 vanished before elimination [2021-06-05 22:10:26,865 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 3 treesize of output 1 [2021-06-05 22:10:26,866 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,999 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 22:10:26,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:27,004 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 6 treesize of output 2 [2021-06-05 22:10:27,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:27,134 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 22:10:27,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:27,139 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 3 treesize of output 1 [2021-06-05 22:10:27,139 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:27,268 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:10:27,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:27,273 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 4 treesize of output 2 [2021-06-05 22:10:27,273 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:27,400 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 22:10:27,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:27,404 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 5 treesize of output 1 [2021-06-05 22:10:27,405 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:27,409 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 5 treesize of output 1 [2021-06-05 22:10:27,410 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:27,539 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 22:10:27,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:27,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 11 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 22:10:27,542 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 20 variables, input treesize:803, output treesize:236 [2021-06-05 22:10:27,688 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 22:10:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:27,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472066855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:27,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:27,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:10:27,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090965503] [2021-06-05 22:10:27,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:10:27,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:27,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:10:27,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:27,833 INFO L87 Difference]: Start difference. First operand 866 states and 3020 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:28,076 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 22:10:28,334 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 22:10:28,503 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 22:10:28,988 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-05 22:10:29,186 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 22:10:29,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:29,214 INFO L93 Difference]: Finished difference Result 1130 states and 3780 transitions. [2021-06-05 22:10:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:10:29,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:10:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:29,216 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 22:10:29,216 INFO L226 Difference]: Without dead ends: 1115 [2021-06-05 22:10:29,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1781.1ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:10:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-05 22:10:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 864. [2021-06-05 22:10:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4936268829663963) internal successors, (3015), 863 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 3015 transitions. [2021-06-05 22:10:29,227 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 3015 transitions. Word has length 20 [2021-06-05 22:10:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:29,227 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 3015 transitions. [2021-06-05 22:10:29,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 3015 transitions. [2021-06-05 22:10:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:29,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:29,228 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:29,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16628,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:29,433 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 475888592, now seen corresponding path program 103 times [2021-06-05 22:10:29,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:29,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241908618] [2021-06-05 22:10:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:29,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:29,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241908618] [2021-06-05 22:10:29,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241908618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:29,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180383590] [2021-06-05 22:10:29,687 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 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 22:10:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:10:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:30,235 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_860], 21=[ends_with_10]} [2021-06-05 22:10:30,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,242 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:10:30,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,251 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:30,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,258 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:30,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,265 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:30,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,678 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 104 [2021-06-05 22:10:30,678 INFO L628 ElimStorePlain]: treesize reduction 354, result has 52.0 percent of original size [2021-06-05 22:10:30,683 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 5 treesize of output 1 [2021-06-05 22:10:30,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,689 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 4 treesize of output 2 [2021-06-05 22:10:30,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,695 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 4 treesize of output 2 [2021-06-05 22:10:30,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,700 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 6 treesize of output 2 [2021-06-05 22:10:30,701 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,706 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 5 treesize of output 1 [2021-06-05 22:10:30,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,711 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 4 treesize of output 2 [2021-06-05 22:10:30,712 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,879 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 22:10:30,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:30,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-06-05 22:10:30,890 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:857, output treesize:355 [2021-06-05 22:10:31,213 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 127 [2021-06-05 22:10:32,999 INFO L446 ElimStorePlain]: Different costs {15=[v_prenex_866, v_prenex_877], 21=[v_prenex_865, v_prenex_876, ends_with_6], 28=[ends_with_2]} [2021-06-05 22:10:33,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:33,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:33,025 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:33,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:33,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:33,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:33,049 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:33,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:33,062 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:33,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:33,073 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:33,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,083 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 3 treesize of output 1 [2021-06-05 22:10:33,084 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:33,095 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,765 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 147 [2021-06-05 22:10:33,766 INFO L628 ElimStorePlain]: treesize reduction 1013, result has 32.4 percent of original size [2021-06-05 22:10:33,773 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 4 treesize of output 2 [2021-06-05 22:10:33,774 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,780 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 4 treesize of output 2 [2021-06-05 22:10:33,781 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:33,787 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 4 treesize of output 2 [2021-06-05 22:10:33,788 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,008 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-05 22:10:34,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:34,014 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 3 treesize of output 1 [2021-06-05 22:10:34,015 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,021 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 5 treesize of output 1 [2021-06-05 22:10:34,021 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,237 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 22:10:34,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:34,244 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 6 treesize of output 2 [2021-06-05 22:10:34,245 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,251 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 4 treesize of output 2 [2021-06-05 22:10:34,252 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,257 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 4 treesize of output 2 [2021-06-05 22:10:34,258 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,461 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 22:10:34,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:34,468 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 4 treesize of output 2 [2021-06-05 22:10:34,469 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,475 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 3 treesize of output 1 [2021-06-05 22:10:34,476 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,482 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 6 treesize of output 2 [2021-06-05 22:10:34,483 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,489 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 5 treesize of output 1 [2021-06-05 22:10:34,490 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,495 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 6 treesize of output 2 [2021-06-05 22:10:34,496 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,691 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 22:10:34,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:34,698 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 6 treesize of output 2 [2021-06-05 22:10:34,699 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,705 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 5 treesize of output 1 [2021-06-05 22:10:34,705 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,711 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 5 treesize of output 1 [2021-06-05 22:10:34,712 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,718 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 3 treesize of output 1 [2021-06-05 22:10:34,719 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,724 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 4 treesize of output 2 [2021-06-05 22:10:34,725 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:34,905 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 22:10:34,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:34,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 25 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:10:34,911 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 31 variables, input treesize:1845, output treesize:321 [2021-06-05 22:10:35,170 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 22:10:35,369 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 22:10:35,543 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 22:10:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:35,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180383590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:35,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:35,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:10:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147223868] [2021-06-05 22:10:35,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:10:35,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:10:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:35,626 INFO L87 Difference]: Start difference. First operand 864 states and 3015 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:36,506 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 133 [2021-06-05 22:10:36,919 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-06-05 22:10:37,337 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 130 [2021-06-05 22:10:37,708 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2021-06-05 22:10:38,210 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-06-05 22:10:38,619 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-06-05 22:10:38,957 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2021-06-05 22:10:39,484 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2021-06-05 22:10:39,821 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 59 [2021-06-05 22:10:40,207 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2021-06-05 22:10:40,580 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 69 [2021-06-05 22:10:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:40,584 INFO L93 Difference]: Finished difference Result 1209 states and 3918 transitions. [2021-06-05 22:10:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:10:40,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:10:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:40,586 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 22:10:40,586 INFO L226 Difference]: Without dead ends: 1149 [2021-06-05 22:10:40,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 5656.0ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:10:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-06-05 22:10:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 867. [2021-06-05 22:10:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.495381062355658) internal successors, (3027), 866 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 3027 transitions. [2021-06-05 22:10:40,597 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 3027 transitions. Word has length 20 [2021-06-05 22:10:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:40,597 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 3027 transitions. [2021-06-05 22:10:40,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:10:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 3027 transitions. [2021-06-05 22:10:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:40,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:40,598 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:40,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16924,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:40,799 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:40,799 INFO L82 PathProgramCache]: Analyzing trace with hash -300859448, now seen corresponding path program 104 times [2021-06-05 22:10:40,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:40,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739219294] [2021-06-05 22:10:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:41,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:41,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739219294] [2021-06-05 22:10:41,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739219294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:41,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512504843] [2021-06-05 22:10:41,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:10:41,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:41,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:10:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:41,256 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 22:10:41,689 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_888], 15=[ends_with_10]} [2021-06-05 22:10:41,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:41,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:41,696 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:41,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:41,703 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 3 treesize of output 1 [2021-06-05 22:10:41,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:41,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:41,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:41,711 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:41,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:41,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:41,718 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:41,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,223 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 123 [2021-06-05 22:10:42,224 INFO L628 ElimStorePlain]: treesize reduction 326, result has 62.5 percent of original size [2021-06-05 22:10:42,229 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 3 treesize of output 1 [2021-06-05 22:10:42,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,235 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 6 treesize of output 2 [2021-06-05 22:10:42,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,241 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 6 treesize of output 2 [2021-06-05 22:10:42,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,247 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 4 treesize of output 2 [2021-06-05 22:10:42,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,253 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 6 treesize of output 2 [2021-06-05 22:10:42,254 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,260 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 6 treesize of output 2 [2021-06-05 22:10:42,261 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,267 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 4 treesize of output 2 [2021-06-05 22:10:42,267 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,273 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 4 treesize of output 2 [2021-06-05 22:10:42,274 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,279 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 4 treesize of output 2 [2021-06-05 22:10:42,280 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,715 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 111 [2021-06-05 22:10:42,715 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-06-05 22:10:42,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 12 xjuncts. [2021-06-05 22:10:42,728 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:976, output treesize:487 [2021-06-05 22:10:43,054 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 115 [2021-06-05 22:10:43,283 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:10:45,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:45,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:45,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:45,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:45,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:45,266 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:45,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:45,739 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 112 [2021-06-05 22:10:45,739 INFO L628 ElimStorePlain]: treesize reduction 539, result has 44.0 percent of original size [2021-06-05 22:10:45,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_907 vanished before elimination [2021-06-05 22:10:45,744 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 3 treesize of output 1 [2021-06-05 22:10:45,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:45,925 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 22:10:45,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:45,930 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 4 treesize of output 2 [2021-06-05 22:10:45,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,109 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:10:46,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:46,114 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 4 treesize of output 2 [2021-06-05 22:10:46,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,297 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:10:46,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:46,297 INFO L518 ElimStorePlain]: Eliminatee v_prenex_900 vanished before elimination [2021-06-05 22:10:46,297 INFO L518 ElimStorePlain]: Eliminatee v_prenex_899 vanished before elimination [2021-06-05 22:10:46,303 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 4 treesize of output 2 [2021-06-05 22:10:46,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,486 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 22:10:46,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:46,492 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 4 treesize of output 2 [2021-06-05 22:10:46,492 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,497 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 4 treesize of output 2 [2021-06-05 22:10:46,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,666 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:10:46,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:46,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_904 vanished before elimination [2021-06-05 22:10:46,672 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 6 treesize of output 2 [2021-06-05 22:10:46,672 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,677 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 6 treesize of output 2 [2021-06-05 22:10:46,678 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,843 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:10:46,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:46,843 INFO L518 ElimStorePlain]: Eliminatee v_prenex_903 vanished before elimination [2021-06-05 22:10:46,848 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 4 treesize of output 2 [2021-06-05 22:10:46,849 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:46,854 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 4 treesize of output 2 [2021-06-05 22:10:46,854 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:47,014 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 22:10:47,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:47,018 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 3 treesize of output 1 [2021-06-05 22:10:47,019 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:47,176 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 22:10:47,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:47,176 INFO L518 ElimStorePlain]: Eliminatee v_prenex_896 vanished before elimination [2021-06-05 22:10:47,181 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 3 treesize of output 1 [2021-06-05 22:10:47,182 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:47,336 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 22:10:47,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:47,336 INFO L518 ElimStorePlain]: Eliminatee v_prenex_898 vanished before elimination [2021-06-05 22:10:47,336 INFO L518 ElimStorePlain]: Eliminatee v_prenex_897 vanished before elimination [2021-06-05 22:10:47,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 18 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 22:10:47,340 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 32 variables, input treesize:1102, output treesize:301 [2021-06-05 22:10:47,505 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 22:10:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:47,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512504843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:47,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:47,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:10:47,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703663228] [2021-06-05 22:10:47,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:10:47,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:10:47,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:47,673 INFO L87 Difference]: Start difference. First operand 867 states and 3027 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,508 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 121 [2021-06-05 22:10:48,723 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 22:10:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:48,752 INFO L93 Difference]: Finished difference Result 1113 states and 3719 transitions. [2021-06-05 22:10:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:10:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:48,754 INFO L225 Difference]: With dead ends: 1113 [2021-06-05 22:10:48,754 INFO L226 Difference]: Without dead ends: 1098 [2021-06-05 22:10:48,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1821.9ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-06-05 22:10:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 864. [2021-06-05 22:10:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4936268829663963) internal successors, (3015), 863 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 3015 transitions. [2021-06-05 22:10:48,763 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 3015 transitions. Word has length 20 [2021-06-05 22:10:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:48,763 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 3015 transitions. [2021-06-05 22:10:48,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 3015 transitions. [2021-06-05 22:10:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:48,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:48,765 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:48,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17196,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:48,965 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash 892897788, now seen corresponding path program 105 times [2021-06-05 22:10:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:48,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810661043] [2021-06-05 22:10:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:49,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:49,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810661043] [2021-06-05 22:10:49,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810661043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:49,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325332274] [2021-06-05 22:10:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:10:49,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:10:49,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:10:49,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:49,438 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-05 22:10:49,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,746 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:49,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,752 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:49,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,758 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:49,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,765 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:49,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,770 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:49,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,125 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 22:10:50,125 INFO L628 ElimStorePlain]: treesize reduction 296, result has 55.2 percent of original size [2021-06-05 22:10:50,129 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 6 treesize of output 2 [2021-06-05 22:10:50,130 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,134 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 6 treesize of output 2 [2021-06-05 22:10:50,135 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,294 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 22:10:50,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:50,298 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 3 treesize of output 1 [2021-06-05 22:10:50,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,302 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 3 treesize of output 1 [2021-06-05 22:10:50,303 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,459 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 22:10:50,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:50,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:10:50,463 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:766, output treesize:347 [2021-06-05 22:10:50,737 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 22:10:52,126 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_2], 6=[v_prenex_922], 15=[ends_with_10], 28=[v_prenex_923]} [2021-06-05 22:10:52,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,135 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:52,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:52,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,153 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:52,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:52,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,170 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:52,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:52,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:52,187 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:52,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:52,195 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,815 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 116 [2021-06-05 22:10:52,815 INFO L628 ElimStorePlain]: treesize reduction 1137, result has 31.5 percent of original size [2021-06-05 22:10:52,821 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 6 treesize of output 2 [2021-06-05 22:10:52,822 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,827 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 4 treesize of output 2 [2021-06-05 22:10:52,828 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,833 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 4 treesize of output 2 [2021-06-05 22:10:52,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,848 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 4 treesize of output 2 [2021-06-05 22:10:52,850 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,855 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 6 treesize of output 2 [2021-06-05 22:10:52,855 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,860 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 5 treesize of output 1 [2021-06-05 22:10:52,861 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,865 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 3 treesize of output 1 [2021-06-05 22:10:52,866 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,871 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 6 treesize of output 2 [2021-06-05 22:10:52,872 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,877 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 6 treesize of output 2 [2021-06-05 22:10:52,878 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,883 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 3 treesize of output 1 [2021-06-05 22:10:52,884 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,888 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 4 treesize of output 2 [2021-06-05 22:10:52,889 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,100 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 22:10:53,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:53,105 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 3 treesize of output 1 [2021-06-05 22:10:53,106 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,110 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 3 treesize of output 1 [2021-06-05 22:10:53,111 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,317 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 22:10:53,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:53,322 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 5 treesize of output 1 [2021-06-05 22:10:53,322 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,327 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 6 treesize of output 2 [2021-06-05 22:10:53,328 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,332 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 4 treesize of output 2 [2021-06-05 22:10:53,333 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,337 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 6 treesize of output 2 [2021-06-05 22:10:53,338 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,343 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 4 treesize of output 2 [2021-06-05 22:10:53,344 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,349 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 6 treesize of output 2 [2021-06-05 22:10:53,349 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,354 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 4 treesize of output 2 [2021-06-05 22:10:53,355 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,359 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 4 treesize of output 2 [2021-06-05 22:10:53,360 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,365 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 4 treesize of output 2 [2021-06-05 22:10:53,366 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,370 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 6 treesize of output 2 [2021-06-05 22:10:53,371 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,375 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 3 treesize of output 1 [2021-06-05 22:10:53,376 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,714 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2021-06-05 22:10:53,714 INFO L628 ElimStorePlain]: treesize reduction 30, result has 92.8 percent of original size [2021-06-05 22:10:53,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 22:10:53,719 INFO L247 ElimStorePlain]: Needed 33 recursive calls to eliminate 13 variables, input treesize:1956, output treesize:323 [2021-06-05 22:10:53,949 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 22:10:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:54,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325332274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:54,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:54,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:10:54,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811589911] [2021-06-05 22:10:54,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:10:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:10:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:54,205 INFO L87 Difference]: Start difference. First operand 864 states and 3015 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:55,190 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 22:10:55,430 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 22:10:55,658 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2021-06-05 22:10:55,951 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 22:10:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:56,076 INFO L93 Difference]: Finished difference Result 1225 states and 3997 transitions. [2021-06-05 22:10:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:10:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:56,078 INFO L225 Difference]: With dead ends: 1225 [2021-06-05 22:10:56,078 INFO L226 Difference]: Without dead ends: 1150 [2021-06-05 22:10:56,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2440.8ms TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:10:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-06-05 22:10:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 867. [2021-06-05 22:10:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.4988452655889146) internal successors, (3030), 866 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 3030 transitions. [2021-06-05 22:10:56,089 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 3030 transitions. Word has length 20 [2021-06-05 22:10:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:56,089 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 3030 transitions. [2021-06-05 22:10:56,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 3030 transitions. [2021-06-05 22:10:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:56,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:56,090 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:56,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17503,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:56,291 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:56,291 INFO L82 PathProgramCache]: Analyzing trace with hash 337780176, now seen corresponding path program 106 times [2021-06-05 22:10:56,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:56,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321658805] [2021-06-05 22:10:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:56,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:56,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321658805] [2021-06-05 22:10:56,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321658805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:56,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701564798] [2021-06-05 22:10:56,472 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 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 22:10:56,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:56,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:10:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:56,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,793 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:56,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,799 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:10:56,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,804 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:56,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,809 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:10:56,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,815 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:10:56,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,820 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:10:56,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,826 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:56,826 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:56,830 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,835 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:56,835 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:56,840 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,845 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:56,845 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,849 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:56,850 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,854 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:56,855 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,859 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:56,860 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,864 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:56,865 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,869 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:56,869 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,873 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:56,874 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,879 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:56,879 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,883 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:56,884 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:56,887 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:10:56,888 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,111 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 22:10:57,112 INFO L628 ElimStorePlain]: treesize reduction 33, result has 88.3 percent of original size [2021-06-05 22:10:57,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:10:57,115 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:789, output treesize:249 [2021-06-05 22:10:57,249 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:10:58,353 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, v_prenex_931, ends_with_6, v_prenex_932, v_prenex_937, v_prenex_936], 10=[v_prenex_933, v_prenex_938]} [2021-06-05 22:10:58,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:58,359 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:10:58,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,571 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 62 [2021-06-05 22:10:58,572 INFO L628 ElimStorePlain]: treesize reduction 514, result has 25.6 percent of original size [2021-06-05 22:10:58,572 INFO L518 ElimStorePlain]: Eliminatee v_prenex_931 vanished before elimination [2021-06-05 22:10:58,575 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 6 treesize of output 2 [2021-06-05 22:10:58,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,579 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 4 treesize of output 2 [2021-06-05 22:10:58,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:58,661 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 3 treesize of output 1 [2021-06-05 22:10:58,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:58,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_937 vanished before elimination [2021-06-05 22:10:58,742 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 3 treesize of output 1 [2021-06-05 22:10:58,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:58,822 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 6 treesize of output 2 [2021-06-05 22:10:58,823 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:58,899 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 5 treesize of output 1 [2021-06-05 22:10:58,900 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,902 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 5 treesize of output 1 [2021-06-05 22:10:58,903 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:58,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:10:58,973 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:701, output treesize:137 [2021-06-05 22:10:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:59,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701564798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:59,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:59,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:10:59,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504303408] [2021-06-05 22:10:59,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:10:59,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:10:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:59,191 INFO L87 Difference]: Start difference. First operand 867 states and 3030 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:59,748 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 22:11:00,677 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-06-05 22:11:01,233 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-06-05 22:11:01,716 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2021-06-05 22:11:02,147 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-05 22:11:02,534 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2021-06-05 22:11:03,040 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 81 [2021-06-05 22:11:03,596 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-06-05 22:11:04,003 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-06-05 22:11:04,463 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2021-06-05 22:11:04,661 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2021-06-05 22:11:05,150 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 86 [2021-06-05 22:11:05,630 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-06-05 22:11:06,067 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 77 [2021-06-05 22:11:06,547 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 84 [2021-06-05 22:11:06,755 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2021-06-05 22:11:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:06,760 INFO L93 Difference]: Finished difference Result 1510 states and 4938 transitions. [2021-06-05 22:11:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:11:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:06,762 INFO L225 Difference]: With dead ends: 1510 [2021-06-05 22:11:06,762 INFO L226 Difference]: Without dead ends: 1389 [2021-06-05 22:11:06,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 7592.2ms TimeCoverageRelationStatistics Valid=509, Invalid=2143, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:11:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-06-05 22:11:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 883. [2021-06-05 22:11:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.4909297052154193) internal successors, (3079), 882 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3079 transitions. [2021-06-05 22:11:06,774 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3079 transitions. Word has length 20 [2021-06-05 22:11:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:06,774 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 3079 transitions. [2021-06-05 22:11:06,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3079 transitions. [2021-06-05 22:11:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:06,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:06,775 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:06,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18039 [2021-06-05 22:11:06,976 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1550328280, now seen corresponding path program 107 times [2021-06-05 22:11:06,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:06,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722732679] [2021-06-05 22:11:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:07,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722732679] [2021-06-05 22:11:07,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722732679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880977477] [2021-06-05 22:11:07,348 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 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 22:11:07,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:07,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:11:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:07,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880977477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:07,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:07,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:11:07,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588632780] [2021-06-05 22:11:07,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:11:07,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:11:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:07,861 INFO L87 Difference]: Start difference. First operand 883 states and 3079 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:11:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:08,772 INFO L93 Difference]: Finished difference Result 1204 states and 4027 transitions. [2021-06-05 22:11:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:11:08,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:11:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:08,774 INFO L225 Difference]: With dead ends: 1204 [2021-06-05 22:11:08,774 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 22:11:08,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1204.2ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:11:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 22:11:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 886. [2021-06-05 22:11:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.488135593220339) internal successors, (3087), 885 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3087 transitions. [2021-06-05 22:11:08,784 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3087 transitions. Word has length 20 [2021-06-05 22:11:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:08,784 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3087 transitions. [2021-06-05 22:11:08,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:11:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3087 transitions. [2021-06-05 22:11:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:08,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:08,786 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:08,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18196 [2021-06-05 22:11:08,986 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:08,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:08,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1829557528, now seen corresponding path program 108 times [2021-06-05 22:11:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:08,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401709364] [2021-06-05 22:11:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:09,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:09,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401709364] [2021-06-05 22:11:09,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401709364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:09,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100028697] [2021-06-05 22:11:09,162 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 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 22:11:09,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:11:09,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:09,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:09,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:09,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,439 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:09,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,446 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:09,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:09,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,460 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:09,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,468 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:09,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,475 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:09,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,482 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:09,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,489 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:09,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,496 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:09,497 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,503 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:09,504 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,510 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:09,511 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,517 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:09,517 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,523 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:09,524 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,529 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:09,530 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,534 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:09,535 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,540 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:09,541 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,546 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:09,546 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,551 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:09,551 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,556 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:09,557 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,561 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:09,562 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,566 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:09,567 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,571 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:09,572 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:09,576 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,580 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:09,581 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,584 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:09,585 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,854 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:11:09,855 INFO L628 ElimStorePlain]: treesize reduction 64, result has 82.8 percent of original size [2021-06-05 22:11:09,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:11:09,858 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:991, output treesize:308 [2021-06-05 22:11:10,107 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 22:11:11,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:11,043 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:11,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:11,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:11,049 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:11,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:11,055 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:11,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,267 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-06-05 22:11:11,268 INFO L628 ElimStorePlain]: treesize reduction 260, result has 41.8 percent of original size [2021-06-05 22:11:11,271 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 5 treesize of output 1 [2021-06-05 22:11:11,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:11,356 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 4 treesize of output 2 [2021-06-05 22:11:11,357 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:11,439 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 3 treesize of output 1 [2021-06-05 22:11:11,440 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:11,530 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 3 treesize of output 1 [2021-06-05 22:11:11,531 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:11,609 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 6 treesize of output 2 [2021-06-05 22:11:11,610 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:11,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:11,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:11:11,686 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:505, output treesize:136 [2021-06-05 22:11:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:11,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100028697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:11,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:11,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454690582] [2021-06-05 22:11:11,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:11,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:11,899 INFO L87 Difference]: Start difference. First operand 886 states and 3087 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:12,230 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-05 22:11:12,474 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-06-05 22:11:12,791 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-05 22:11:13,154 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2021-06-05 22:11:13,373 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2021-06-05 22:11:13,699 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 72 [2021-06-05 22:11:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:13,721 INFO L93 Difference]: Finished difference Result 1266 states and 4160 transitions. [2021-06-05 22:11:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:13,723 INFO L225 Difference]: With dead ends: 1266 [2021-06-05 22:11:13,723 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 22:11:13,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2299.6ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:11:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 22:11:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 894. [2021-06-05 22:11:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4804031354983205) internal successors, (3108), 893 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3108 transitions. [2021-06-05 22:11:13,734 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3108 transitions. Word has length 20 [2021-06-05 22:11:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:13,734 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3108 transitions. [2021-06-05 22:11:13,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3108 transitions. [2021-06-05 22:11:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:13,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:13,735 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:13,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18215 [2021-06-05 22:11:13,936 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:13,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:13,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1863438574, now seen corresponding path program 109 times [2021-06-05 22:11:13,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:13,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897637205] [2021-06-05 22:11:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:14,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:14,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897637205] [2021-06-05 22:11:14,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897637205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:14,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015833841] [2021-06-05 22:11:14,133 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 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 22:11:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:14,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:14,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:14,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,545 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:14,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,551 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:14,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,556 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:14,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,562 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:14,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,568 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:14,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,573 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:14,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,579 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:14,580 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,584 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:14,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,589 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:14,590 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,595 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:14,595 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,600 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:14,601 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,605 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:14,606 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:14,610 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,615 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:14,615 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,620 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:14,621 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,625 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:14,626 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,630 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:14,631 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,635 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:14,636 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:14,640 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,644 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:14,645 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,782 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 22:11:14,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:14,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:11:14,786 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:889, output treesize:289 [2021-06-05 22:11:14,960 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 22:11:15,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:15,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:15,828 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:15,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:15,833 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:15,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:15,838 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:15,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:15,989 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-06-05 22:11:15,989 INFO L628 ElimStorePlain]: treesize reduction 153, result has 48.8 percent of original size [2021-06-05 22:11:15,992 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 3 treesize of output 1 [2021-06-05 22:11:15,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:16,062 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 6 treesize of output 2 [2021-06-05 22:11:16,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:16,129 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:11:16,131 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 6 treesize of output 2 [2021-06-05 22:11:16,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:16,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_954 vanished before elimination [2021-06-05 22:11:16,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:11:16,197 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:362, output treesize:131 [2021-06-05 22:11:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:16,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015833841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:16,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:16,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:16,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189205623] [2021-06-05 22:11:16,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:16,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:16,399 INFO L87 Difference]: Start difference. First operand 894 states and 3108 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:16,513 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 22:11:16,654 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 22:11:17,435 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2021-06-05 22:11:17,814 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 22:11:18,080 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 22:11:18,352 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 22:11:18,539 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-06-05 22:11:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:18,577 INFO L93 Difference]: Finished difference Result 1384 states and 4443 transitions. [2021-06-05 22:11:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:11:18,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:18,579 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 22:11:18,579 INFO L226 Difference]: Without dead ends: 1309 [2021-06-05 22:11:18,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2336.4ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:11:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-06-05 22:11:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 906. [2021-06-05 22:11:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.4917127071823204) internal successors, (3160), 905 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3160 transitions. [2021-06-05 22:11:18,591 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3160 transitions. Word has length 20 [2021-06-05 22:11:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:18,591 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 3160 transitions. [2021-06-05 22:11:18,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3160 transitions. [2021-06-05 22:11:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:18,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:18,592 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:18,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18548,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:18,792 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1246446742, now seen corresponding path program 110 times [2021-06-05 22:11:18,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:18,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531157853] [2021-06-05 22:11:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:18,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:18,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531157853] [2021-06-05 22:11:18,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531157853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:18,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311502664] [2021-06-05 22:11:18,981 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 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 22:11:19,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:19,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:11:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:19,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,380 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:19,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,385 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:19,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:19,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,396 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:19,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:19,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,406 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:19,407 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,411 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:19,412 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,417 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:19,417 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,422 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:19,422 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,427 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:19,428 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,432 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:19,433 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,438 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:19,438 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,443 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:19,444 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,448 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:19,449 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:19,453 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,458 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:19,458 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,463 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:19,463 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,468 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:19,468 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,472 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:19,473 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:19,477 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:19,477 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,600 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 22:11:19,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:19,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:11:19,604 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:837, output treesize:269 [2021-06-05 22:11:19,864 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-06-05 22:11:20,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:20,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:20,786 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:20,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:20,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:20,792 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:20,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:21,123 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2021-06-05 22:11:21,124 INFO L628 ElimStorePlain]: treesize reduction 325, result has 47.7 percent of original size [2021-06-05 22:11:21,128 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 4 treesize of output 2 [2021-06-05 22:11:21,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:21,261 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 22:11:21,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:21,265 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 3 treesize of output 1 [2021-06-05 22:11:21,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:21,396 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 22:11:21,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:21,400 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 4 treesize of output 2 [2021-06-05 22:11:21,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:21,528 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 22:11:21,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:21,532 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 3 treesize of output 1 [2021-06-05 22:11:21,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:21,657 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 22:11:21,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:21,662 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 4 treesize of output 2 [2021-06-05 22:11:21,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:21,788 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 22:11:21,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:21,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 22:11:21,792 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 10 variables, input treesize:671, output treesize:239 [2021-06-05 22:11:21,993 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 22:11:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:22,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311502664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:22,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:22,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532585747] [2021-06-05 22:11:22,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:22,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:22,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:22,250 INFO L87 Difference]: Start difference. First operand 906 states and 3160 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,139 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 22:11:23,354 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 22:11:23,531 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 22:11:23,775 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 22:11:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:23,810 INFO L93 Difference]: Finished difference Result 1251 states and 4123 transitions. [2021-06-05 22:11:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:11:23,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:23,812 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 22:11:23,812 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 22:11:23,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2021.7ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:11:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 22:11:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 903. [2021-06-05 22:11:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.491130820399113) internal successors, (3149), 902 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3149 transitions. [2021-06-05 22:11:23,822 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3149 transitions. Word has length 20 [2021-06-05 22:11:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:23,822 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3149 transitions. [2021-06-05 22:11:23,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3149 transitions. [2021-06-05 22:11:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:23,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:23,823 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:24,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18777,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:24,024 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:24,024 INFO L82 PathProgramCache]: Analyzing trace with hash 513606198, now seen corresponding path program 111 times [2021-06-05 22:11:24,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:24,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801962448] [2021-06-05 22:11:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:24,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:24,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801962448] [2021-06-05 22:11:24,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801962448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:24,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011650743] [2021-06-05 22:11:24,215 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 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 22:11:24,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:11:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:11:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:24,584 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 22:11:25,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,364 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:25,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,372 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:25,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,403 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,403 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,411 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:25,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,417 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:25,418 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,423 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,428 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,434 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,439 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,449 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:25,449 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,454 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,455 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,460 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:25,460 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,465 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:25,466 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,471 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:25,472 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,477 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,478 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,483 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,483 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,488 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,492 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:25,493 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,498 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,498 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,503 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,507 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,512 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:25,513 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,517 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:25,518 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,523 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:25,524 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,529 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,529 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,534 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,535 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,539 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:25,540 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,544 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,549 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:25,550 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,554 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,558 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,562 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:25,563 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,567 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,571 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:25,575 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,805 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 22:11:25,806 INFO L628 ElimStorePlain]: treesize reduction 24, result has 91.7 percent of original size [2021-06-05 22:11:25,809 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 4 treesize of output 2 [2021-06-05 22:11:25,810 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,813 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 3 treesize of output 1 [2021-06-05 22:11:25,814 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,817 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 4 treesize of output 2 [2021-06-05 22:11:25,818 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,821 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 4 treesize of output 2 [2021-06-05 22:11:25,822 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,825 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 3 treesize of output 1 [2021-06-05 22:11:25,826 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,829 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 4 treesize of output 2 [2021-06-05 22:11:25,830 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:26,027 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-05 22:11:26,028 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.2 percent of original size [2021-06-05 22:11:26,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 22:11:26,030 INFO L247 ElimStorePlain]: Needed 47 recursive calls to eliminate 3 variables, input treesize:1646, output treesize:200 [2021-06-05 22:11:26,179 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:11:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:26,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011650743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:26,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:26,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:26,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182015450] [2021-06-05 22:11:26,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:26,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:26,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:26,413 INFO L87 Difference]: Start difference. First operand 903 states and 3149 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:26,705 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 22:11:27,219 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 22:11:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:27,405 INFO L93 Difference]: Finished difference Result 1141 states and 3810 transitions. [2021-06-05 22:11:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:11:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:27,407 INFO L225 Difference]: With dead ends: 1141 [2021-06-05 22:11:27,407 INFO L226 Difference]: Without dead ends: 1126 [2021-06-05 22:11:27,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1293.3ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-05 22:11:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 903. [2021-06-05 22:11:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.491130820399113) internal successors, (3149), 902 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3149 transitions. [2021-06-05 22:11:27,417 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3149 transitions. Word has length 20 [2021-06-05 22:11:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:27,417 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3149 transitions. [2021-06-05 22:11:27,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3149 transitions. [2021-06-05 22:11:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:27,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:27,418 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:27,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19233 [2021-06-05 22:11:27,619 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash -998413246, now seen corresponding path program 112 times [2021-06-05 22:11:27,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:27,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752003354] [2021-06-05 22:11:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:27,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752003354] [2021-06-05 22:11:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752003354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646125424] [2021-06-05 22:11:27,926 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 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 22:11:27,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:27,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:27,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:28,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,725 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:28,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,738 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:28,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,743 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:28,743 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:28,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,753 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:28,753 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,757 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:28,762 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,766 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:28,767 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,771 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,774 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:28,779 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,782 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,786 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,789 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:28,790 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,794 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:28,797 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:28,798 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:28,801 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,917 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:11:28,917 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.9 percent of original size [2021-06-05 22:11:28,920 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 3 treesize of output 1 [2021-06-05 22:11:28,921 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,923 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 5 treesize of output 1 [2021-06-05 22:11:28,924 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,927 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 4 treesize of output 2 [2021-06-05 22:11:28,927 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,930 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 3 treesize of output 1 [2021-06-05 22:11:28,931 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,933 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 4 treesize of output 2 [2021-06-05 22:11:28,934 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:28,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:28,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:11:28,983 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:781, output treesize:89 [2021-06-05 22:11:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646125424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:29,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:29,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490154723] [2021-06-05 22:11:29,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:29,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:29,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:29,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:29,098 INFO L87 Difference]: Start difference. First operand 903 states and 3149 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:29,832 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 22:11:30,077 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 22:11:30,297 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-05 22:11:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:30,419 INFO L93 Difference]: Finished difference Result 1076 states and 3621 transitions. [2021-06-05 22:11:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:11:30,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:30,421 INFO L225 Difference]: With dead ends: 1076 [2021-06-05 22:11:30,421 INFO L226 Difference]: Without dead ends: 1061 [2021-06-05 22:11:30,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1653.0ms TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:11:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-05 22:11:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 903. [2021-06-05 22:11:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.491130820399113) internal successors, (3149), 902 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3149 transitions. [2021-06-05 22:11:30,431 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3149 transitions. Word has length 20 [2021-06-05 22:11:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:30,431 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3149 transitions. [2021-06-05 22:11:30,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3149 transitions. [2021-06-05 22:11:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:30,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:30,432 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:30,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19581,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:30,633 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1755439614, now seen corresponding path program 113 times [2021-06-05 22:11:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:30,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974468241] [2021-06-05 22:11:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:30,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:30,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974468241] [2021-06-05 22:11:30,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974468241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:30,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693592332] [2021-06-05 22:11:30,832 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 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 22:11:30,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:11:30,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:31,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693592332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:31,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:31,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:11:31,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715936253] [2021-06-05 22:11:31,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:11:31,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:11:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:31,324 INFO L87 Difference]: Start difference. First operand 903 states and 3149 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:11:32,175 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-05 22:11:32,476 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-06-05 22:11:32,627 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 22:11:32,827 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:11:33,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:33,047 INFO L93 Difference]: Finished difference Result 1208 states and 3960 transitions. [2021-06-05 22:11:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:11:33,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:11:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:33,049 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 22:11:33,049 INFO L226 Difference]: Without dead ends: 1148 [2021-06-05 22:11:33,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1845.6ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:11:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-06-05 22:11:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 909. [2021-06-05 22:11:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 3.495594713656388) internal successors, (3174), 908 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3174 transitions. [2021-06-05 22:11:33,059 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3174 transitions. Word has length 20 [2021-06-05 22:11:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:33,059 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 3174 transitions. [2021-06-05 22:11:33,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:11:33,059 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3174 transitions. [2021-06-05 22:11:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:33,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:33,060 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:33,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19745 [2021-06-05 22:11:33,261 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1403063924, now seen corresponding path program 114 times [2021-06-05 22:11:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:33,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855619486] [2021-06-05 22:11:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:33,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855619486] [2021-06-05 22:11:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855619486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886236319] [2021-06-05 22:11:33,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:11:33,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:34,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,382 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:34,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,392 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:34,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,406 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:34,407 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,416 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,420 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,425 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:34,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,430 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:34,430 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,434 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,439 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,443 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:34,444 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,447 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,452 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:34,452 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,457 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:34,457 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,461 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,465 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:34,466 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:34,470 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,474 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:34,475 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,479 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:34,479 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:34,483 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:34,483 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,663 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 22:11:34,664 INFO L628 ElimStorePlain]: treesize reduction 25, result has 88.3 percent of original size [2021-06-05 22:11:34,669 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 4 treesize of output 2 [2021-06-05 22:11:34,670 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,673 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 4 treesize of output 2 [2021-06-05 22:11:34,673 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,676 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 3 treesize of output 1 [2021-06-05 22:11:34,677 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,681 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 4 treesize of output 2 [2021-06-05 22:11:34,682 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,684 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 5 treesize of output 1 [2021-06-05 22:11:34,685 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,688 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 3 treesize of output 1 [2021-06-05 22:11:34,689 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:34,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:11:34,766 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 3 variables, input treesize:1029, output treesize:136 [2021-06-05 22:11:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886236319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:34,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:34,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:34,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994116024] [2021-06-05 22:11:34,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:34,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:34,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:34,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:34,973 INFO L87 Difference]: Start difference. First operand 909 states and 3174 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:35,220 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 22:11:35,614 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 22:11:36,504 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 22:11:36,684 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 22:11:36,920 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 22:11:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:37,023 INFO L93 Difference]: Finished difference Result 1303 states and 4232 transitions. [2021-06-05 22:11:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:11:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:37,025 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 22:11:37,025 INFO L226 Difference]: Without dead ends: 1243 [2021-06-05 22:11:37,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2126.3ms TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:11:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-05 22:11:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 921. [2021-06-05 22:11:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.501086956521739) internal successors, (3221), 920 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 3221 transitions. [2021-06-05 22:11:37,036 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 3221 transitions. Word has length 20 [2021-06-05 22:11:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:37,036 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 3221 transitions. [2021-06-05 22:11:37,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 3221 transitions. [2021-06-05 22:11:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:37,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:37,037 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:37,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19767 [2021-06-05 22:11:37,238 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1404631678, now seen corresponding path program 115 times [2021-06-05 22:11:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:37,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839769362] [2021-06-05 22:11:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:37,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:37,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839769362] [2021-06-05 22:11:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839769362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:37,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867375499] [2021-06-05 22:11:37,516 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 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 22:11:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:37,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,915 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:37,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,919 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:37,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,924 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:37,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,929 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:37,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,933 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:37,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,938 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:37,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,943 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:37,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,947 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:37,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,951 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:37,952 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,955 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:37,956 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,960 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:37,960 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:37,963 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:37,964 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:38,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:38,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 6 xjuncts. [2021-06-05 22:11:38,034 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:425, output treesize:169 [2021-06-05 22:11:38,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:38,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:38,950 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:38,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:38,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:38,955 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:38,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,162 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 22:11:39,163 INFO L628 ElimStorePlain]: treesize reduction 194, result has 48.8 percent of original size [2021-06-05 22:11:39,166 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 3 treesize of output 1 [2021-06-05 22:11:39,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:39,249 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 5 treesize of output 1 [2021-06-05 22:11:39,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:39,329 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 4 treesize of output 2 [2021-06-05 22:11:39,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:39,408 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 3 treesize of output 1 [2021-06-05 22:11:39,409 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:39,487 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 4 treesize of output 2 [2021-06-05 22:11:39,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:39,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:11:39,563 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 9 variables, input treesize:427, output treesize:136 [2021-06-05 22:11:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:39,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867375499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:39,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:39,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:39,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199193632] [2021-06-05 22:11:39,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:39,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:39,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:39,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:39,770 INFO L87 Difference]: Start difference. First operand 921 states and 3221 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:40,243 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-06-05 22:11:40,476 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2021-06-05 22:11:40,657 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 22:11:40,849 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-06-05 22:11:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:40,874 INFO L93 Difference]: Finished difference Result 1171 states and 3911 transitions. [2021-06-05 22:11:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:40,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:40,875 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 22:11:40,875 INFO L226 Difference]: Without dead ends: 1141 [2021-06-05 22:11:40,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1522.8ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:11:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-06-05 22:11:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 918. [2021-06-05 22:11:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.50381679389313) internal successors, (3213), 917 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3213 transitions. [2021-06-05 22:11:40,887 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3213 transitions. Word has length 20 [2021-06-05 22:11:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:40,887 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 3213 transitions. [2021-06-05 22:11:40,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3213 transitions. [2021-06-05 22:11:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:40,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:40,888 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:41,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20040,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:41,088 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash 294181020, now seen corresponding path program 116 times [2021-06-05 22:11:41,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:41,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418111850] [2021-06-05 22:11:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:41,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:41,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418111850] [2021-06-05 22:11:41,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418111850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:41,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854547642] [2021-06-05 22:11:41,301 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 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 22:11:41,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:42,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,383 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:42,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,394 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:42,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:42,400 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,405 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,409 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,414 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:42,415 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,420 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:42,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,426 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:42,426 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,431 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,436 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:42,436 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,441 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,445 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,450 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,454 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,458 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:42,459 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,463 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,467 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:42,468 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,472 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,476 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:42,477 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,481 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,485 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,489 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:42,490 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,494 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:42,495 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,499 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:42,499 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,504 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:42,504 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:42,509 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:42,509 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:42,513 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,734 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 22:11:42,735 INFO L628 ElimStorePlain]: treesize reduction 31, result has 87.6 percent of original size [2021-06-05 22:11:42,738 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 3 treesize of output 1 [2021-06-05 22:11:42,739 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,742 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 4 treesize of output 2 [2021-06-05 22:11:42,742 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,745 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 4 treesize of output 2 [2021-06-05 22:11:42,746 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,749 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 4 treesize of output 2 [2021-06-05 22:11:42,750 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,753 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 3 treesize of output 1 [2021-06-05 22:11:42,754 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,757 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 4 treesize of output 2 [2021-06-05 22:11:42,757 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,760 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 5 treesize of output 1 [2021-06-05 22:11:42,761 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:42,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:42,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:11:42,851 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 3 variables, input treesize:1292, output treesize:162 [2021-06-05 22:11:42,996 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-05 22:11:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:43,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854547642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:43,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:43,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:43,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162285558] [2021-06-05 22:11:43,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:43,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:43,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:43,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:43,124 INFO L87 Difference]: Start difference. First operand 918 states and 3213 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:43,745 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-05 22:11:43,952 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 22:11:44,199 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 22:11:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:44,293 INFO L93 Difference]: Finished difference Result 1205 states and 3958 transitions. [2021-06-05 22:11:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:11:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:44,296 INFO L225 Difference]: With dead ends: 1205 [2021-06-05 22:11:44,296 INFO L226 Difference]: Without dead ends: 1130 [2021-06-05 22:11:44,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1514.5ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:11:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-05 22:11:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 930. [2021-06-05 22:11:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.5156081808396125) internal successors, (3266), 929 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3266 transitions. [2021-06-05 22:11:44,307 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3266 transitions. Word has length 20 [2021-06-05 22:11:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:44,307 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 3266 transitions. [2021-06-05 22:11:44,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3266 transitions. [2021-06-05 22:11:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:44,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:44,309 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:44,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20421 [2021-06-05 22:11:44,509 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash -199712680, now seen corresponding path program 117 times [2021-06-05 22:11:44,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:44,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818948290] [2021-06-05 22:11:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:44,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:44,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818948290] [2021-06-05 22:11:44,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818948290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:44,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088492839] [2021-06-05 22:11:44,748 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 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 22:11:44,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:11:44,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:45,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,004 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:45,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,009 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:45,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:45,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,021 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:45,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,027 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:45,028 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,033 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:45,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,038 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:45,039 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,044 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:45,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,050 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:45,051 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,056 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:45,056 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,061 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:45,062 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,068 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:45,068 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,073 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:45,074 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,093 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:45,094 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,101 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:45,102 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,109 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:45,110 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,116 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:45,117 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,123 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:45,124 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,130 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:45,130 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,136 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:45,137 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,143 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:45,144 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,150 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:45,150 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:45,154 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,159 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:45,159 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:45,163 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:45,164 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:45,439 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:11:45,440 INFO L628 ElimStorePlain]: treesize reduction 60, result has 83.3 percent of original size [2021-06-05 22:11:45,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-06-05 22:11:45,443 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:971, output treesize:300 [2021-06-05 22:11:45,697 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 22:11:46,701 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_980, v_prenex_982, v_prenex_973, v_prenex_983, ends_with_10, v_prenex_986, v_prenex_975, ends_with_6, v_prenex_974, v_prenex_987, v_prenex_976], 15=[v_prenex_979]} [2021-06-05 22:11:46,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,707 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:46,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,922 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 77 [2021-06-05 22:11:46,922 INFO L628 ElimStorePlain]: treesize reduction 403, result has 32.4 percent of original size [2021-06-05 22:11:46,926 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 6 treesize of output 2 [2021-06-05 22:11:46,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:47,013 INFO L518 ElimStorePlain]: Eliminatee v_prenex_973 vanished before elimination [2021-06-05 22:11:47,017 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 3 treesize of output 1 [2021-06-05 22:11:47,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:47,106 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 4 treesize of output 2 [2021-06-05 22:11:47,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:47,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_986 vanished before elimination [2021-06-05 22:11:47,192 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 5 treesize of output 1 [2021-06-05 22:11:47,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:47,276 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 4 treesize of output 2 [2021-06-05 22:11:47,277 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:47,355 INFO L518 ElimStorePlain]: Eliminatee v_prenex_974 vanished before elimination [2021-06-05 22:11:47,358 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 6 treesize of output 2 [2021-06-05 22:11:47,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:47,434 INFO L518 ElimStorePlain]: Eliminatee v_prenex_976 vanished before elimination [2021-06-05 22:11:47,438 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 5 treesize of output 1 [2021-06-05 22:11:47,439 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:47,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:11:47,514 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 20 variables, input treesize:629, output treesize:136 [2021-06-05 22:11:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:47,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088492839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:47,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:47,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:47,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848506963] [2021-06-05 22:11:47,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:47,723 INFO L87 Difference]: Start difference. First operand 930 states and 3266 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,174 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 22:11:48,364 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 22:11:48,738 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 22:11:49,094 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2021-06-05 22:11:49,467 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2021-06-05 22:11:49,722 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2021-06-05 22:11:50,162 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-06-05 22:11:50,572 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 88 [2021-06-05 22:11:51,067 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2021-06-05 22:11:51,405 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-06-05 22:11:51,726 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2021-06-05 22:11:52,005 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-06-05 22:11:52,335 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2021-06-05 22:11:52,759 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2021-06-05 22:11:53,106 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2021-06-05 22:11:53,398 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 90 [2021-06-05 22:11:53,692 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 99 [2021-06-05 22:11:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,702 INFO L93 Difference]: Finished difference Result 1752 states and 5524 transitions. [2021-06-05 22:11:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:11:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,705 INFO L225 Difference]: With dead ends: 1752 [2021-06-05 22:11:53,705 INFO L226 Difference]: Without dead ends: 1662 [2021-06-05 22:11:53,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 6219.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1490, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:11:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-06-05 22:11:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 952. [2021-06-05 22:11:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.5341745531019977) internal successors, (3361), 951 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3361 transitions. [2021-06-05 22:11:53,719 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3361 transitions. Word has length 20 [2021-06-05 22:11:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,719 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3361 transitions. [2021-06-05 22:11:53,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3361 transitions. [2021-06-05 22:11:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:53,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,720 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20714,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:53,921 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash -837951760, now seen corresponding path program 118 times [2021-06-05 22:11:53,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346051836] [2021-06-05 22:11:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:54,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:54,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346051836] [2021-06-05 22:11:54,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346051836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:54,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178068751] [2021-06-05 22:11:54,137 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 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 22:11:54,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:54,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:11:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:54,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,572 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:54,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,578 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:54,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,583 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:54,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,588 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:54,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,594 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:54,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,601 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:54,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,606 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:54,607 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,612 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:54,613 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,617 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:54,618 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,622 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:54,623 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,628 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:54,629 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,633 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:54,634 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,638 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:54,639 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,643 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:54,644 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,648 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:54,649 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:54,654 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,658 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:54,659 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,663 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:11:54,663 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,667 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:54,668 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,671 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:11:54,672 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,900 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 22:11:54,900 INFO L628 ElimStorePlain]: treesize reduction 60, result has 80.1 percent of original size [2021-06-05 22:11:54,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:11:54,904 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:769, output treesize:241 [2021-06-05 22:11:55,038 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:11:55,218 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 22:11:55,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:55,824 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:11:55,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:55,922 INFO L628 ElimStorePlain]: treesize reduction 102, result has 49.5 percent of original size [2021-06-05 22:11:55,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_993 vanished before elimination [2021-06-05 22:11:55,924 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 4 treesize of output 2 [2021-06-05 22:11:55,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:55,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:55,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_994 vanished before elimination [2021-06-05 22:11:55,967 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 4 treesize of output 2 [2021-06-05 22:11:55,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:56,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:56,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:11:56,008 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:210, output treesize:92 [2021-06-05 22:11:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178068751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:56,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:56,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:11:56,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779135219] [2021-06-05 22:11:56,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:56,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:56,125 INFO L87 Difference]: Start difference. First operand 952 states and 3361 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,582 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 22:11:57,082 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2021-06-05 22:11:57,493 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-06-05 22:11:57,842 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2021-06-05 22:11:58,142 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-06-05 22:11:58,580 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 22:11:58,891 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-06-05 22:11:59,041 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:11:59,329 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-06-05 22:11:59,474 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:11:59,762 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2021-06-05 22:11:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:59,777 INFO L93 Difference]: Finished difference Result 1352 states and 4424 transitions. [2021-06-05 22:11:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:11:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:59,779 INFO L225 Difference]: With dead ends: 1352 [2021-06-05 22:11:59,779 INFO L226 Difference]: Without dead ends: 1322 [2021-06-05 22:11:59,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 4049.0ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:11:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-06-05 22:11:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 956. [2021-06-05 22:11:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 3.531937172774869) internal successors, (3373), 955 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 3373 transitions. [2021-06-05 22:11:59,791 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 3373 transitions. Word has length 20 [2021-06-05 22:11:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:59,791 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 3373 transitions. [2021-06-05 22:11:59,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 3373 transitions. [2021-06-05 22:11:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:59,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:59,792 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:59,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20844,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:59,993 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1678238390, now seen corresponding path program 119 times [2021-06-05 22:11:59,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:59,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163313609] [2021-06-05 22:11:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:00,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163313609] [2021-06-05 22:12:00,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163313609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:00,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439686740] [2021-06-05 22:12:00,208 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 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 22:12:00,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:12:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:00,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:12:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:00,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439686740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:00,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:00,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:12:00,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858999214] [2021-06-05 22:12:00,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:00,825 INFO L87 Difference]: Start difference. First operand 956 states and 3373 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:12:01,107 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 22:12:01,897 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 22:12:02,362 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 22:12:02,560 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 22:12:02,755 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 22:12:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:02,757 INFO L93 Difference]: Finished difference Result 1526 states and 4940 transitions. [2021-06-05 22:12:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:12:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:12:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:02,760 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 22:12:02,760 INFO L226 Difference]: Without dead ends: 1511 [2021-06-05 22:12:02,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2028.8ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:12:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-06-05 22:12:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 960. [2021-06-05 22:12:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.531803962460897) internal successors, (3387), 959 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3387 transitions. [2021-06-05 22:12:02,771 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3387 transitions. Word has length 20 [2021-06-05 22:12:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:02,771 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3387 transitions. [2021-06-05 22:12:02,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:12:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3387 transitions. [2021-06-05 22:12:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:02,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:02,773 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:02,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21006 [2021-06-05 22:12:02,973 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1060539052, now seen corresponding path program 120 times [2021-06-05 22:12:02,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:02,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65940036] [2021-06-05 22:12:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:03,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65940036] [2021-06-05 22:12:03,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65940036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380902168] [2021-06-05 22:12:03,169 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 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 22:12:03,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:03,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:12:03,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:03,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,640 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:03,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,645 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:03,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,650 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:03,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,655 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:03,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,660 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:03,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,665 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:03,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,670 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:03,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,676 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:03,676 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,681 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:03,682 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,686 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:03,687 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,691 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:03,692 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,696 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:03,697 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,701 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:03,702 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,707 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:03,707 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,711 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:03,712 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:03,717 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:03,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,830 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 22:12:03,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:03,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:12:03,833 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:609, output treesize:241 [2021-06-05 22:12:03,978 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:12:04,154 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 22:12:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:04,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:04,912 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:04,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:04,916 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:04,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,009 INFO L628 ElimStorePlain]: treesize reduction 76, result has 56.8 percent of original size [2021-06-05 22:12:05,012 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 4 treesize of output 2 [2021-06-05 22:12:05,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:05,054 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 4 treesize of output 2 [2021-06-05 22:12:05,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:05,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:05,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:210, output treesize:92 [2021-06-05 22:12:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:05,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380902168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:05,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:05,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:12:05,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463834201] [2021-06-05 22:12:05,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:05,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:05,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:05,213 INFO L87 Difference]: Start difference. First operand 960 states and 3387 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,969 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 98 [2021-06-05 22:12:06,245 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-06-05 22:12:06,694 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 102 [2021-06-05 22:12:06,926 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-06-05 22:12:07,246 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2021-06-05 22:12:07,697 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-06-05 22:12:07,848 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:12:08,154 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-06-05 22:12:08,488 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-06-05 22:12:08,628 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 22:12:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:08,639 INFO L93 Difference]: Finished difference Result 1393 states and 4537 transitions. [2021-06-05 22:12:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:12:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:08,642 INFO L225 Difference]: With dead ends: 1393 [2021-06-05 22:12:08,642 INFO L226 Difference]: Without dead ends: 1363 [2021-06-05 22:12:08,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3831.5ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:12:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-06-05 22:12:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 955. [2021-06-05 22:12:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.5335429769392035) internal successors, (3371), 954 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3371 transitions. [2021-06-05 22:12:08,659 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3371 transitions. Word has length 20 [2021-06-05 22:12:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:08,659 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3371 transitions. [2021-06-05 22:12:08,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3371 transitions. [2021-06-05 22:12:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:08,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:08,661 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:08,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21029 [2021-06-05 22:12:08,875 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:08,875 INFO L82 PathProgramCache]: Analyzing trace with hash 145457564, now seen corresponding path program 121 times [2021-06-05 22:12:08,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:08,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430761373] [2021-06-05 22:12:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:09,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430761373] [2021-06-05 22:12:09,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430761373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905471436] [2021-06-05 22:12:09,071 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 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 22:12:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:09,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:12:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:09,304 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 22:12:09,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,754 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:09,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:09,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,770 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:09,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:09,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:09,784 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:09,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,251 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 97 [2021-06-05 22:12:10,252 INFO L628 ElimStorePlain]: treesize reduction 434, result has 50.1 percent of original size [2021-06-05 22:12:10,256 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 3 treesize of output 1 [2021-06-05 22:12:10,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,261 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 5 treesize of output 1 [2021-06-05 22:12:10,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,449 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 22:12:10,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:10,454 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 5 treesize of output 1 [2021-06-05 22:12:10,455 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,459 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 3 treesize of output 1 [2021-06-05 22:12:10,460 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,644 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 22:12:10,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:10,649 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 6 treesize of output 2 [2021-06-05 22:12:10,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,654 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 6 treesize of output 2 [2021-06-05 22:12:10,655 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,660 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 6 treesize of output 2 [2021-06-05 22:12:10,661 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:10,839 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 22:12:10,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:10,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:12:10,850 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:995, output treesize:401 [2021-06-05 22:12:11,131 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 125 [2021-06-05 22:12:11,657 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 22:12:13,181 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, ends_with_6, v_prenex_1023, v_prenex_1012, v_prenex_1024, v_prenex_1013, v_prenex_1014, v_prenex_1015, v_prenex_1026, v_prenex_1027, v_prenex_1029, v_prenex_1020, v_prenex_1010, v_prenex_1021, v_prenex_1022, v_prenex_1011], 10=[v_prenex_1016, v_prenex_1017]} [2021-06-05 22:12:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:13,190 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:13,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:13,200 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:13,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:13,208 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:13,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,454 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 65 [2021-06-05 22:12:13,455 INFO L628 ElimStorePlain]: treesize reduction 746, result has 17.2 percent of original size [2021-06-05 22:12:13,459 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 4 treesize of output 2 [2021-06-05 22:12:13,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:13,522 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1023 vanished before elimination [2021-06-05 22:12:13,522 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1012 vanished before elimination [2021-06-05 22:12:13,525 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 3 treesize of output 1 [2021-06-05 22:12:13,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:13,589 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1013 vanished before elimination [2021-06-05 22:12:13,589 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1014 vanished before elimination [2021-06-05 22:12:13,589 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1015 vanished before elimination [2021-06-05 22:12:13,592 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 4 treesize of output 2 [2021-06-05 22:12:13,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:13,652 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1027 vanished before elimination [2021-06-05 22:12:13,652 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1029 vanished before elimination [2021-06-05 22:12:13,652 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1020 vanished before elimination [2021-06-05 22:12:13,656 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 5 treesize of output 1 [2021-06-05 22:12:13,657 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:13,714 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1021 vanished before elimination [2021-06-05 22:12:13,714 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1022 vanished before elimination [2021-06-05 22:12:13,717 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 5 treesize of output 1 [2021-06-05 22:12:13,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:13,776 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 6 treesize of output 2 [2021-06-05 22:12:13,777 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:13,834 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 5 treesize of output 1 [2021-06-05 22:12:13,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:13,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 18 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:13,888 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 26 variables, input treesize:966, output treesize:107 [2021-06-05 22:12:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:14,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905471436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:14,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:14,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:12:14,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615591815] [2021-06-05 22:12:14,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:14,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:14,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:14,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:14,022 INFO L87 Difference]: Start difference. First operand 955 states and 3371 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:14,804 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2021-06-05 22:12:14,979 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-05 22:12:15,484 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 116 [2021-06-05 22:12:15,908 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 105 [2021-06-05 22:12:16,443 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 83 [2021-06-05 22:12:16,891 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 115 [2021-06-05 22:12:17,275 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 118 [2021-06-05 22:12:17,620 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 114 [2021-06-05 22:12:18,020 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 111 [2021-06-05 22:12:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:18,033 INFO L93 Difference]: Finished difference Result 1361 states and 4487 transitions. [2021-06-05 22:12:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:12:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:18,035 INFO L225 Difference]: With dead ends: 1361 [2021-06-05 22:12:18,035 INFO L226 Difference]: Without dead ends: 1331 [2021-06-05 22:12:18,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 4647.1ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:12:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-05 22:12:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 951. [2021-06-05 22:12:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.533684210526316) internal successors, (3357), 950 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3357 transitions. [2021-06-05 22:12:18,046 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3357 transitions. Word has length 20 [2021-06-05 22:12:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:18,046 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3357 transitions. [2021-06-05 22:12:18,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3357 transitions. [2021-06-05 22:12:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:18,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:18,048 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:18,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21376 [2021-06-05 22:12:18,248 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1943695790, now seen corresponding path program 122 times [2021-06-05 22:12:18,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:18,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888660631] [2021-06-05 22:12:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:18,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:18,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888660631] [2021-06-05 22:12:18,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888660631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:18,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393834640] [2021-06-05 22:12:18,460 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:18,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:18,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:12:18,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:18,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,803 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:18,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,808 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:18,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,813 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:18,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,818 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:18,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:18,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,828 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:18,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,834 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:18,835 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:18,839 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,844 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:18,844 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,848 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:18,849 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,853 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:18,854 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:18,857 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:18,858 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:18,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 6 xjuncts. [2021-06-05 22:12:18,948 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:473, output treesize:193 [2021-06-05 22:12:19,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:19,636 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:19,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,844 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2021-06-05 22:12:19,844 INFO L628 ElimStorePlain]: treesize reduction 303, result has 37.0 percent of original size [2021-06-05 22:12:19,848 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 4 treesize of output 2 [2021-06-05 22:12:19,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:19,932 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 5 treesize of output 1 [2021-06-05 22:12:19,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:20,010 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1036 vanished before elimination [2021-06-05 22:12:20,010 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1037 vanished before elimination [2021-06-05 22:12:20,014 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 4 treesize of output 2 [2021-06-05 22:12:20,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:20,091 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1039 vanished before elimination [2021-06-05 22:12:20,094 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 4 treesize of output 2 [2021-06-05 22:12:20,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:20,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1040 vanished before elimination [2021-06-05 22:12:20,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1043 vanished before elimination [2021-06-05 22:12:20,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1032 vanished before elimination [2021-06-05 22:12:20,172 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 3 treesize of output 1 [2021-06-05 22:12:20,173 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:20,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:12:20,248 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 18 variables, input treesize:487, output treesize:134 [2021-06-05 22:12:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:20,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393834640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:20,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:20,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:12:20,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458738305] [2021-06-05 22:12:20,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:20,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:20,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:20,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:20,449 INFO L87 Difference]: Start difference. First operand 951 states and 3357 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:21,527 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 22:12:21,687 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 22:12:21,843 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 22:12:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:21,872 INFO L93 Difference]: Finished difference Result 1203 states and 4033 transitions. [2021-06-05 22:12:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:12:21,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:21,874 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 22:12:21,875 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 22:12:21,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1612.5ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:12:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 22:12:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 951. [2021-06-05 22:12:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.531578947368421) internal successors, (3355), 950 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3355 transitions. [2021-06-05 22:12:21,887 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3355 transitions. Word has length 20 [2021-06-05 22:12:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:21,887 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3355 transitions. [2021-06-05 22:12:21,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3355 transitions. [2021-06-05 22:12:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:21,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:21,889 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:22,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21663,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:22,105 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:22,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1175780862, now seen corresponding path program 123 times [2021-06-05 22:12:22,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:22,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769152005] [2021-06-05 22:12:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:22,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769152005] [2021-06-05 22:12:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769152005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30478340] [2021-06-05 22:12:22,327 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:22,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:12:22,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:22,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:12:22,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:23,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,189 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 4 treesize of output 2 [2021-06-05 22:12:23,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,194 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 4 treesize of output 2 [2021-06-05 22:12:23,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,205 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 4 treesize of output 2 [2021-06-05 22:12:23,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,211 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:23,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,216 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 5 treesize of output 1 [2021-06-05 22:12:23,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,221 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:23,222 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,227 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:23,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,233 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:23,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,248 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:23,248 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,253 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,258 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:23,259 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,263 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,268 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,272 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,277 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:23,278 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,282 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,287 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,291 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,295 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 3 treesize of output 1 [2021-06-05 22:12:23,296 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,300 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 4 treesize of output 2 [2021-06-05 22:12:23,301 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,305 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,310 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,314 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 5 treesize of output 1 [2021-06-05 22:12:23,315 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,319 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:23,320 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,325 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,329 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:23,330 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,334 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:23,335 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,338 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 5 treesize of output 1 [2021-06-05 22:12:23,339 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:23,343 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:23,344 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,349 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,352 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,544 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 22:12:23,545 INFO L628 ElimStorePlain]: treesize reduction 240, result has 44.7 percent of original size [2021-06-05 22:12:23,548 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 3 treesize of output 1 [2021-06-05 22:12:23,549 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,552 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 5 treesize of output 1 [2021-06-05 22:12:23,553 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,556 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 4 treesize of output 2 [2021-06-05 22:12:23,556 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,560 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 4 treesize of output 2 [2021-06-05 22:12:23,560 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,563 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 5 treesize of output 1 [2021-06-05 22:12:23,564 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,567 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 4 treesize of output 2 [2021-06-05 22:12:23,568 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,571 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 3 treesize of output 1 [2021-06-05 22:12:23,572 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,716 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 22:12:23,716 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.8 percent of original size [2021-06-05 22:12:23,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:12:23,719 INFO L247 ElimStorePlain]: Needed 43 recursive calls to eliminate 3 variables, input treesize:1308, output treesize:140 [2021-06-05 22:12:23,851 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 22:12:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:24,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30478340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:24,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:24,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:12:24,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950471680] [2021-06-05 22:12:24,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:24,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:24,010 INFO L87 Difference]: Start difference. First operand 951 states and 3355 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:24,818 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 22:12:25,238 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 22:12:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:25,262 INFO L93 Difference]: Finished difference Result 1092 states and 3750 transitions. [2021-06-05 22:12:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:12:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:25,264 INFO L225 Difference]: With dead ends: 1092 [2021-06-05 22:12:25,264 INFO L226 Difference]: Without dead ends: 1077 [2021-06-05 22:12:25,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1591.3ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:12:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-05 22:12:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 946. [2021-06-05 22:12:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.541798941798942) internal successors, (3347), 945 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3347 transitions. [2021-06-05 22:12:25,276 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3347 transitions. Word has length 20 [2021-06-05 22:12:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:25,276 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3347 transitions. [2021-06-05 22:12:25,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3347 transitions. [2021-06-05 22:12:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:25,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:25,278 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:25,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21818,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:25,485 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1662405226, now seen corresponding path program 124 times [2021-06-05 22:12:25,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:25,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558339665] [2021-06-05 22:12:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:25,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558339665] [2021-06-05 22:12:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558339665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920016054] [2021-06-05 22:12:25,724 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:25,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:25,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:12:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,393 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:26,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,401 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:12:26,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,409 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:26,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,417 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 22:12:26,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,838 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 107 [2021-06-05 22:12:26,839 INFO L628 ElimStorePlain]: treesize reduction 350, result has 52.5 percent of original size [2021-06-05 22:12:26,844 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 4 treesize of output 2 [2021-06-05 22:12:26,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,850 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 6 treesize of output 2 [2021-06-05 22:12:26,850 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:27,040 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:12:27,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:27,046 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 3 treesize of output 1 [2021-06-05 22:12:27,047 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:27,051 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 3 treesize of output 1 [2021-06-05 22:12:27,052 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:27,228 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 22:12:27,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:27,233 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 5 treesize of output 1 [2021-06-05 22:12:27,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:27,239 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 5 treesize of output 1 [2021-06-05 22:12:27,239 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:27,412 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 22:12:27,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:27,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-06-05 22:12:27,424 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 13 variables, input treesize:869, output treesize:361 [2021-06-05 22:12:27,615 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:12:29,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:29,726 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:29,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:29,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:29,749 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:12:29,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,336 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 138 [2021-06-05 22:12:30,336 INFO L628 ElimStorePlain]: treesize reduction 1252, result has 22.6 percent of original size [2021-06-05 22:12:30,342 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 4 treesize of output 2 [2021-06-05 22:12:30,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,519 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 22:12:30,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:30,520 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1079 vanished before elimination [2021-06-05 22:12:30,526 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 3 treesize of output 1 [2021-06-05 22:12:30,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,700 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 22:12:30,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:30,701 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1071 vanished before elimination [2021-06-05 22:12:30,701 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1072 vanished before elimination [2021-06-05 22:12:30,715 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 3 treesize of output 1 [2021-06-05 22:12:30,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,887 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 22:12:30,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:30,888 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1095 vanished before elimination [2021-06-05 22:12:30,894 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 5 treesize of output 1 [2021-06-05 22:12:30,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:31,065 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:12:31,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:31,065 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1075 vanished before elimination [2021-06-05 22:12:31,065 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1098 vanished before elimination [2021-06-05 22:12:31,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1076 vanished before elimination [2021-06-05 22:12:31,071 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 6 treesize of output 2 [2021-06-05 22:12:31,072 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:31,239 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:12:31,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:31,245 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 4 treesize of output 2 [2021-06-05 22:12:31,246 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:31,411 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 22:12:31,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:31,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1080 vanished before elimination [2021-06-05 22:12:31,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1100 vanished before elimination [2021-06-05 22:12:31,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1067 vanished before elimination [2021-06-05 22:12:31,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1089 vanished before elimination [2021-06-05 22:12:31,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1068 vanished before elimination [2021-06-05 22:12:31,418 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 3 treesize of output 1 [2021-06-05 22:12:31,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:31,580 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 22:12:31,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:31,586 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 3 treesize of output 1 [2021-06-05 22:12:31,587 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:31,747 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 22:12:31,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:31,754 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 6 treesize of output 2 [2021-06-05 22:12:31,755 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:31,921 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 22:12:31,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:31,926 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 4 treesize of output 2 [2021-06-05 22:12:31,927 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,084 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 22:12:32,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:32,089 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 5 treesize of output 1 [2021-06-05 22:12:32,090 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,244 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 22:12:32,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:32,249 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 4 treesize of output 2 [2021-06-05 22:12:32,250 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,401 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 22:12:32,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:32,401 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1063 vanished before elimination [2021-06-05 22:12:32,406 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 3 treesize of output 1 [2021-06-05 22:12:32,407 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,555 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:12:32,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:32,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1064 vanished before elimination [2021-06-05 22:12:32,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1065 vanished before elimination [2021-06-05 22:12:32,560 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 3 treesize of output 1 [2021-06-05 22:12:32,561 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,708 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:12:32,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:32,708 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1066 vanished before elimination [2021-06-05 22:12:32,713 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 4 treesize of output 2 [2021-06-05 22:12:32,714 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,861 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 22:12:32,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:32,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 32 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:12:32,866 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 48 variables, input treesize:1729, output treesize:245 [2021-06-05 22:12:33,121 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 22:12:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:33,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920016054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:33,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:33,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:12:33,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030433408] [2021-06-05 22:12:33,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:33,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:33,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:33,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:33,388 INFO L87 Difference]: Start difference. First operand 946 states and 3347 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:34,244 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 22:12:34,591 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 22:12:34,853 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 22:12:35,177 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 22:12:35,503 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-06-05 22:12:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:35,672 INFO L93 Difference]: Finished difference Result 1307 states and 4321 transitions. [2021-06-05 22:12:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:12:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:35,674 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 22:12:35,674 INFO L226 Difference]: Without dead ends: 1262 [2021-06-05 22:12:35,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2748.4ms TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:12:35,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-06-05 22:12:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 947. [2021-06-05 22:12:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.544397463002114) internal successors, (3353), 946 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3353 transitions. [2021-06-05 22:12:35,685 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3353 transitions. Word has length 20 [2021-06-05 22:12:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:35,685 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3353 transitions. [2021-06-05 22:12:35,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3353 transitions. [2021-06-05 22:12:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:35,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:35,687 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:35,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22051 [2021-06-05 22:12:35,887 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:35,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:35,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1732515262, now seen corresponding path program 125 times [2021-06-05 22:12:35,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:35,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362585068] [2021-06-05 22:12:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:36,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:36,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362585068] [2021-06-05 22:12:36,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362585068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:36,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907780984] [2021-06-05 22:12:36,147 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:36,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:12:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:36,641 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 22:12:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:36,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907780984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:36,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:36,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:12:36,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468846447] [2021-06-05 22:12:36,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:36,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:36,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:36,834 INFO L87 Difference]: Start difference. First operand 947 states and 3353 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:12:37,710 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 22:12:38,072 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-06-05 22:12:38,402 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 22:12:38,731 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-05 22:12:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:38,773 INFO L93 Difference]: Finished difference Result 1254 states and 4162 transitions. [2021-06-05 22:12:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:12:38,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:12:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:38,775 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 22:12:38,775 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 22:12:38,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2198.4ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:12:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 22:12:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 953. [2021-06-05 22:12:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.543067226890756) internal successors, (3373), 952 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3373 transitions. [2021-06-05 22:12:38,786 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3373 transitions. Word has length 20 [2021-06-05 22:12:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:38,786 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 3373 transitions. [2021-06-05 22:12:38,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:12:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3373 transitions. [2021-06-05 22:12:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:38,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:38,787 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:38,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22357 [2021-06-05 22:12:38,990 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:38,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1224657572, now seen corresponding path program 126 times [2021-06-05 22:12:38,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:38,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978518441] [2021-06-05 22:12:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:39,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:39,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978518441] [2021-06-05 22:12:39,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978518441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:39,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568153111] [2021-06-05 22:12:39,265 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:39,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:12:39,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:39,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568153111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:39,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:39,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:12:39,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73681022] [2021-06-05 22:12:39,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:39,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:39,784 INFO L87 Difference]: Start difference. First operand 953 states and 3373 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:12:40,347 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 22:12:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:40,620 INFO L93 Difference]: Finished difference Result 1214 states and 4111 transitions. [2021-06-05 22:12:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:12:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:12:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:40,622 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 22:12:40,622 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 22:12:40,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1089.7ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:12:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 22:12:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 954. [2021-06-05 22:12:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.5435466946484784) internal successors, (3377), 953 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3377 transitions. [2021-06-05 22:12:40,633 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3377 transitions. Word has length 20 [2021-06-05 22:12:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:40,633 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3377 transitions. [2021-06-05 22:12:40,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:12:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3377 transitions. [2021-06-05 22:12:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:40,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:40,634 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:40,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22385,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:40,835 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash 269945392, now seen corresponding path program 127 times [2021-06-05 22:12:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:40,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817561610] [2021-06-05 22:12:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:41,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:41,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817561610] [2021-06-05 22:12:41,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817561610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:41,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182950287] [2021-06-05 22:12:41,037 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:12:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:41,303 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 22:12:41,971 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_1108, v_prenex_1110], 28=[ends_with_2]} [2021-06-05 22:12:41,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:41,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:41,980 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:41,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:41,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:41,988 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:41,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:41,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:41,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:41,996 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:41,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:42,004 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:42,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,563 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 134 [2021-06-05 22:12:42,564 INFO L628 ElimStorePlain]: treesize reduction 490, result has 50.1 percent of original size [2021-06-05 22:12:42,569 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 6 treesize of output 2 [2021-06-05 22:12:42,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,576 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 6 treesize of output 2 [2021-06-05 22:12:42,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,801 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:12:42,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:42,807 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 5 treesize of output 1 [2021-06-05 22:12:42,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,813 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 4 treesize of output 2 [2021-06-05 22:12:42,814 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,818 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 6 treesize of output 2 [2021-06-05 22:12:42,819 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,824 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 3 treesize of output 1 [2021-06-05 22:12:42,825 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,831 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 4 treesize of output 2 [2021-06-05 22:12:42,832 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:42,837 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 4 treesize of output 2 [2021-06-05 22:12:42,837 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:43,056 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 22:12:43,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:43,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-06-05 22:12:43,069 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 12 variables, input treesize:1099, output treesize:453 [2021-06-05 22:12:43,416 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 129 [2021-06-05 22:12:43,801 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 91 [2021-06-05 22:12:44,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:44,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:44,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:44,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:44,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:44,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:44,706 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:12:44,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:44,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:44,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:44,712 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:44,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:44,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:44,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:44,897 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-06-05 22:12:44,898 INFO L628 ElimStorePlain]: treesize reduction 562, result has 21.0 percent of original size [2021-06-05 22:12:44,901 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 3 treesize of output 1 [2021-06-05 22:12:44,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:44,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:44,968 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 4 treesize of output 2 [2021-06-05 22:12:44,969 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:45,032 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 4 treesize of output 2 [2021-06-05 22:12:45,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:45,104 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 3 treesize of output 1 [2021-06-05 22:12:45,105 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:45,165 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 4 treesize of output 2 [2021-06-05 22:12:45,166 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:45,223 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 5 treesize of output 1 [2021-06-05 22:12:45,224 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:45,280 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 5 treesize of output 1 [2021-06-05 22:12:45,281 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:45,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:45,335 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:893, output treesize:105 [2021-06-05 22:12:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:45,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182950287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:45,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:45,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:12:45,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961252497] [2021-06-05 22:12:45,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:45,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:45,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:45,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:45,463 INFO L87 Difference]: Start difference. First operand 954 states and 3377 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:46,076 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 110 [2021-06-05 22:12:46,504 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-05 22:12:47,065 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-06-05 22:12:47,495 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 116 [2021-06-05 22:12:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:47,743 INFO L93 Difference]: Finished difference Result 1164 states and 3940 transitions. [2021-06-05 22:12:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:12:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:47,744 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 22:12:47,744 INFO L226 Difference]: Without dead ends: 1134 [2021-06-05 22:12:47,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3110.3ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:12:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-06-05 22:12:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 958. [2021-06-05 22:12:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.5454545454545454) internal successors, (3393), 957 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3393 transitions. [2021-06-05 22:12:47,755 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3393 transitions. Word has length 20 [2021-06-05 22:12:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:47,755 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3393 transitions. [2021-06-05 22:12:47,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3393 transitions. [2021-06-05 22:12:47,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:47,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:47,756 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:47,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22406,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:47,957 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -39575592, now seen corresponding path program 128 times [2021-06-05 22:12:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:47,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860403812] [2021-06-05 22:12:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:48,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:48,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860403812] [2021-06-05 22:12:48,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860403812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:48,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433234032] [2021-06-05 22:12:48,174 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:48,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:48,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:12:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:48,838 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_1133, ends_with_2], 28=[v_prenex_1131]} [2021-06-05 22:12:48,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,846 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:12:48,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:48,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,854 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:12:48,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:48,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,862 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:12:48,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:48,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,869 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:48,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,278 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 116 [2021-06-05 22:12:49,278 INFO L628 ElimStorePlain]: treesize reduction 362, result has 51.8 percent of original size [2021-06-05 22:12:49,283 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 6 treesize of output 2 [2021-06-05 22:12:49,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,289 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 4 treesize of output 2 [2021-06-05 22:12:49,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,469 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 22:12:49,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:49,474 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 3 treesize of output 1 [2021-06-05 22:12:49,475 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,479 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 4 treesize of output 2 [2021-06-05 22:12:49,480 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,485 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 6 treesize of output 2 [2021-06-05 22:12:49,486 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,490 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 5 treesize of output 1 [2021-06-05 22:12:49,491 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,667 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:12:49,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:49,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-06-05 22:12:49,678 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:869, output treesize:361 [2021-06-05 22:12:49,877 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:12:51,479 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, v_prenex_1177, v_prenex_1155, v_prenex_1157, v_prenex_1159, v_prenex_1138, v_prenex_1139, v_prenex_1170, v_prenex_1171, v_prenex_1150, v_prenex_1152, v_prenex_1153, v_prenex_1154, ends_with_6, v_prenex_1166, v_prenex_1167, v_prenex_1168, v_prenex_1169, v_prenex_1180, v_prenex_1182, v_prenex_1161, v_prenex_1183, v_prenex_1162, v_prenex_1140, v_prenex_1184, v_prenex_1163, v_prenex_1141, v_prenex_1185, v_prenex_1164, v_prenex_1142, v_prenex_1165, v_prenex_1143], 21=[v_prenex_1144, v_prenex_1145]} [2021-06-05 22:12:51,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:52,195 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 139 [2021-06-05 22:12:52,195 INFO L628 ElimStorePlain]: treesize reduction 1688, result has 18.3 percent of original size [2021-06-05 22:12:52,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1177 vanished before elimination [2021-06-05 22:12:52,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1155 vanished before elimination [2021-06-05 22:12:52,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1157 vanished before elimination [2021-06-05 22:12:52,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1159 vanished before elimination [2021-06-05 22:12:52,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1138 vanished before elimination [2021-06-05 22:12:52,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1139 vanished before elimination [2021-06-05 22:12:52,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1170 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1171 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1150 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1152 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1153 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1154 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1166 vanished before elimination [2021-06-05 22:12:52,196 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1167 vanished before elimination [2021-06-05 22:12:52,202 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 3 treesize of output 1 [2021-06-05 22:12:52,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:52,385 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-05 22:12:52,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:52,391 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 4 treesize of output 2 [2021-06-05 22:12:52,392 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:52,571 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 22:12:52,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:52,571 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1180 vanished before elimination [2021-06-05 22:12:52,571 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1182 vanished before elimination [2021-06-05 22:12:52,571 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1161 vanished before elimination [2021-06-05 22:12:52,571 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1183 vanished before elimination [2021-06-05 22:12:52,578 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 4 treesize of output 2 [2021-06-05 22:12:52,579 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:52,757 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 22:12:52,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:52,763 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 3 treesize of output 1 [2021-06-05 22:12:52,764 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:52,941 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:12:52,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:52,947 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 6 treesize of output 2 [2021-06-05 22:12:52,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,124 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:12:53,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:53,131 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 4 treesize of output 2 [2021-06-05 22:12:53,132 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,304 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 22:12:53,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:53,310 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 3 treesize of output 1 [2021-06-05 22:12:53,311 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,479 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 22:12:53,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:53,485 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 6 treesize of output 2 [2021-06-05 22:12:53,486 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,653 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 22:12:53,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:53,659 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 5 treesize of output 1 [2021-06-05 22:12:53,660 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,823 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 22:12:53,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:53,830 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 3 treesize of output 1 [2021-06-05 22:12:53,830 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,000 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 22:12:54,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:54,005 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 4 treesize of output 2 [2021-06-05 22:12:54,006 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,166 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 22:12:54,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:54,171 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 3 treesize of output 1 [2021-06-05 22:12:54,172 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,332 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:12:54,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:54,337 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 6 treesize of output 2 [2021-06-05 22:12:54,338 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,342 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 6 treesize of output 2 [2021-06-05 22:12:54,343 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,497 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:12:54,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:54,519 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 5 treesize of output 1 [2021-06-05 22:12:54,521 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,527 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 3 treesize of output 1 [2021-06-05 22:12:54,528 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,717 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 22:12:54,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:54,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 24 dim-0 vars, 34 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:12:54,722 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 58 variables, input treesize:2225, output treesize:243 [2021-06-05 22:12:54,978 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-05 22:12:55,179 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 22:12:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:55,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433234032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:55,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:55,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:12:55,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543225564] [2021-06-05 22:12:55,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:55,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:55,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:55,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:55,323 INFO L87 Difference]: Start difference. First operand 958 states and 3393 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:56,454 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 22:12:56,737 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 22:12:57,185 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2021-06-05 22:12:57,510 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 22:12:57,832 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 22:12:58,165 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-06-05 22:12:58,466 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 22:12:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:58,478 INFO L93 Difference]: Finished difference Result 1607 states and 5125 transitions. [2021-06-05 22:12:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:12:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:58,481 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 22:12:58,481 INFO L226 Difference]: Without dead ends: 1487 [2021-06-05 22:12:58,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 3578.0ms TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:12:58,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-05 22:12:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 960. [2021-06-05 22:12:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.5411887382690304) internal successors, (3396), 959 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3396 transitions. [2021-06-05 22:12:58,493 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3396 transitions. Word has length 20 [2021-06-05 22:12:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:58,493 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3396 transitions. [2021-06-05 22:12:58,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3396 transitions. [2021-06-05 22:12:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:58,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:58,495 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:58,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22800 [2021-06-05 22:12:58,695 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:58,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1720477348, now seen corresponding path program 129 times [2021-06-05 22:12:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:58,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416798129] [2021-06-05 22:12:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:58,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:58,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416798129] [2021-06-05 22:12:58,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416798129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:58,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020091463] [2021-06-05 22:12:58,944 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:59,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:12:59,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:59,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:12:59,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:59,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:59,428 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:12:59,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,825 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 92 [2021-06-05 22:12:59,825 INFO L628 ElimStorePlain]: treesize reduction 601, result has 36.1 percent of original size [2021-06-05 22:12:59,830 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 4 treesize of output 2 [2021-06-05 22:12:59,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,835 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 4 treesize of output 2 [2021-06-05 22:12:59,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,994 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:12:59,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:59,999 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 5 treesize of output 1 [2021-06-05 22:13:00,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,157 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 22:13:00,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:00,157 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1191 vanished before elimination [2021-06-05 22:13:00,161 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 3 treesize of output 1 [2021-06-05 22:13:00,162 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,317 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 22:13:00,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:00,321 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 4 treesize of output 2 [2021-06-05 22:13:00,322 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,326 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 4 treesize of output 2 [2021-06-05 22:13:00,327 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,478 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:13:00,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:00,482 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 3 treesize of output 1 [2021-06-05 22:13:00,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,633 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:13:00,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:00,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1187 vanished before elimination [2021-06-05 22:13:00,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:13:00,638 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:949, output treesize:313 [2021-06-05 22:13:00,929 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2021-06-05 22:13:02,334 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10], 6=[v_prenex_1198], 21=[ends_with_2], 36=[v_prenex_1197]} [2021-06-05 22:13:02,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,355 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:13:02,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:13:02,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,384 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 3 treesize of output 1 [2021-06-05 22:13:02,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,404 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:13:02,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,413 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,070 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 129 [2021-06-05 22:13:03,071 INFO L628 ElimStorePlain]: treesize reduction 1689, result has 23.7 percent of original size [2021-06-05 22:13:03,077 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 5 treesize of output 1 [2021-06-05 22:13:03,078 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,083 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 6 treesize of output 2 [2021-06-05 22:13:03,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,089 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 3 treesize of output 1 [2021-06-05 22:13:03,090 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,096 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 6 treesize of output 2 [2021-06-05 22:13:03,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,102 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 6 treesize of output 2 [2021-06-05 22:13:03,102 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,108 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 6 treesize of output 2 [2021-06-05 22:13:03,109 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,114 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 4 treesize of output 2 [2021-06-05 22:13:03,115 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,121 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 4 treesize of output 2 [2021-06-05 22:13:03,121 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,126 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 6 treesize of output 2 [2021-06-05 22:13:03,127 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,132 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 4 treesize of output 2 [2021-06-05 22:13:03,133 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,344 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 22:13:03,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:03,349 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 3 treesize of output 1 [2021-06-05 22:13:03,350 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,355 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 3 treesize of output 1 [2021-06-05 22:13:03,356 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,561 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 22:13:03,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:03,567 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 6 treesize of output 2 [2021-06-05 22:13:03,568 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,574 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 6 treesize of output 2 [2021-06-05 22:13:03,575 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,580 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 4 treesize of output 2 [2021-06-05 22:13:03,581 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,586 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 3 treesize of output 1 [2021-06-05 22:13:03,587 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,592 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 6 treesize of output 2 [2021-06-05 22:13:03,593 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,598 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 5 treesize of output 1 [2021-06-05 22:13:03,599 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,605 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 4 treesize of output 2 [2021-06-05 22:13:03,605 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,611 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 6 treesize of output 2 [2021-06-05 22:13:03,612 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,616 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 6 treesize of output 2 [2021-06-05 22:13:03,617 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,622 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 4 treesize of output 2 [2021-06-05 22:13:03,623 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:03,817 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:13:03,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:03,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 22:13:03,823 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 13 variables, input treesize:2528, output treesize:332 [2021-06-05 22:13:04,010 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 22:13:04,189 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 22:13:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:04,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020091463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:04,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:04,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:13:04,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531729984] [2021-06-05 22:13:04,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:13:04,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:04,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:13:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:04,382 INFO L87 Difference]: Start difference. First operand 960 states and 3396 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:04,562 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 22:13:04,709 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 22:13:04,973 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-05 22:13:05,165 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 22:13:05,735 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 22:13:06,161 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-06-05 22:13:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:06,189 INFO L93 Difference]: Finished difference Result 1216 states and 4123 transitions. [2021-06-05 22:13:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:13:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:06,191 INFO L225 Difference]: With dead ends: 1216 [2021-06-05 22:13:06,191 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 22:13:06,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2534.3ms TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:13:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 22:13:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 961. [2021-06-05 22:13:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 3.542708333333333) internal successors, (3401), 960 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 3401 transitions. [2021-06-05 22:13:06,202 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 3401 transitions. Word has length 20 [2021-06-05 22:13:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:06,202 INFO L482 AbstractCegarLoop]: Abstraction has 961 states and 3401 transitions. [2021-06-05 22:13:06,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 3401 transitions. [2021-06-05 22:13:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:06,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:06,203 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:06,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22992 [2021-06-05 22:13:06,404 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:06,404 INFO L82 PathProgramCache]: Analyzing trace with hash 208457904, now seen corresponding path program 130 times [2021-06-05 22:13:06,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:06,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689763060] [2021-06-05 22:13:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:06,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:06,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689763060] [2021-06-05 22:13:06,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689763060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:06,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645215760] [2021-06-05 22:13:06,654 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:06,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:06,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:06,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:13:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:07,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:07,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:07,184 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:07,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:07,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:07,190 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:07,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:07,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:07,196 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:07,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:07,202 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:07,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,561 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-05 22:13:07,562 INFO L628 ElimStorePlain]: treesize reduction 291, result has 52.5 percent of original size [2021-06-05 22:13:07,566 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 6 treesize of output 2 [2021-06-05 22:13:07,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,571 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 4 treesize of output 2 [2021-06-05 22:13:07,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,731 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 22:13:07,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:07,736 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 4 treesize of output 2 [2021-06-05 22:13:07,736 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,740 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 4 treesize of output 2 [2021-06-05 22:13:07,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,896 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 22:13:07,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:07,901 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 3 treesize of output 1 [2021-06-05 22:13:07,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:07,905 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 3 treesize of output 1 [2021-06-05 22:13:07,906 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,056 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 22:13:08,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:08,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-06-05 22:13:08,061 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:721, output treesize:297 [2021-06-05 22:13:08,227 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 22:13:08,567 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 22:13:09,211 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1212, ends_with_2, v_prenex_1215, ends_with_10, v_prenex_1209], 10=[v_prenex_1210, v_prenex_1211]} [2021-06-05 22:13:09,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:09,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:09,262 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:09,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:09,283 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:09,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,414 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-06-05 22:13:09,414 INFO L628 ElimStorePlain]: treesize reduction 230, result has 35.8 percent of original size [2021-06-05 22:13:09,414 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 22:13:09,417 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 6 treesize of output 2 [2021-06-05 22:13:09,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:09,469 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 4 treesize of output 2 [2021-06-05 22:13:09,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:09,520 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 3 treesize of output 1 [2021-06-05 22:13:09,521 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:09,574 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 5 treesize of output 1 [2021-06-05 22:13:09,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:09,621 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 6 treesize of output 2 [2021-06-05 22:13:09,622 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:09,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 7 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:09,665 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:541, output treesize:94 [2021-06-05 22:13:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:09,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645215760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:09,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:09,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:13:09,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055153573] [2021-06-05 22:13:09,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:13:09,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:09,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:13:09,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:13:09,785 INFO L87 Difference]: Start difference. First operand 961 states and 3401 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:13:10,185 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-05 22:13:10,586 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2021-06-05 22:13:10,825 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2021-06-05 22:13:11,274 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2021-06-05 22:13:11,407 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 22:13:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:11,692 INFO L93 Difference]: Finished difference Result 1108 states and 3780 transitions. [2021-06-05 22:13:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:13:11,693 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:13:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:11,694 INFO L225 Difference]: With dead ends: 1108 [2021-06-05 22:13:11,694 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 22:13:11,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2360.8ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:13:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 22:13:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 961. [2021-06-05 22:13:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 3.542708333333333) internal successors, (3401), 960 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 3401 transitions. [2021-06-05 22:13:11,704 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 3401 transitions. Word has length 20 [2021-06-05 22:13:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:11,704 INFO L482 AbstractCegarLoop]: Abstraction has 961 states and 3401 transitions. [2021-06-05 22:13:11,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:13:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 3401 transitions. [2021-06-05 22:13:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:11,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:11,706 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:11,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23404,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:11,929 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:11,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:11,929 INFO L82 PathProgramCache]: Analyzing trace with hash -548568464, now seen corresponding path program 131 times [2021-06-05 22:13:11,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:11,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879141986] [2021-06-05 22:13:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:12,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:12,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879141986] [2021-06-05 22:13:12,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879141986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:12,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341109748] [2021-06-05 22:13:12,145 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:12,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:12,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:13:12,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:12,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341109748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:12,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:12,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:13:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151596698] [2021-06-05 22:13:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:13:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:13:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:12,644 INFO L87 Difference]: Start difference. First operand 961 states and 3401 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:13:12,895 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 22:13:14,291 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-05 22:13:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:14,943 INFO L93 Difference]: Finished difference Result 1575 states and 5046 transitions. [2021-06-05 22:13:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:13:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:13:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:14,945 INFO L225 Difference]: With dead ends: 1575 [2021-06-05 22:13:14,945 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 22:13:14,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2318.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:13:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 22:13:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 976. [2021-06-05 22:13:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.555897435897436) internal successors, (3467), 975 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3467 transitions. [2021-06-05 22:13:14,961 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3467 transitions. Word has length 20 [2021-06-05 22:13:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:14,961 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3467 transitions. [2021-06-05 22:13:14,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:13:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3467 transitions. [2021-06-05 22:13:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:14,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:14,963 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:15,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23612 [2021-06-05 22:13:15,173 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:15,174 INFO L82 PathProgramCache]: Analyzing trace with hash -14102462, now seen corresponding path program 132 times [2021-06-05 22:13:15,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:15,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634925514] [2021-06-05 22:13:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:15,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:15,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634925514] [2021-06-05 22:13:15,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634925514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:15,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339972058] [2021-06-05 22:13:15,373 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:15,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:13:15,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:15,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:13:15,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:15,658 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 22:13:15,940 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_2, v_prenex_1216], 10=[v_prenex_1218]} [2021-06-05 22:13:15,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:15,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:15,946 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:13:15,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:15,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:15,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:15,953 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 22:13:15,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:15,959 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:15,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:16,284 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-05 22:13:16,285 INFO L628 ElimStorePlain]: treesize reduction 376, result has 44.5 percent of original size [2021-06-05 22:13:16,289 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 3 treesize of output 1 [2021-06-05 22:13:16,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:16,294 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 3 treesize of output 1 [2021-06-05 22:13:16,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:16,420 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 22:13:16,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:16,426 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 6 treesize of output 2 [2021-06-05 22:13:16,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:16,431 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 6 treesize of output 2 [2021-06-05 22:13:16,432 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:16,435 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 6 treesize of output 2 [2021-06-05 22:13:16,436 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:16,557 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 22:13:16,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:16,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 7 xjuncts. [2021-06-05 22:13:16,565 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:745, output treesize:277 [2021-06-05 22:13:16,796 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 22:13:17,056 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-06-05 22:13:17,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:17,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:17,953 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:13:17,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:17,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:17,961 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:13:17,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:17,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:17,968 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:17,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,170 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 62 [2021-06-05 22:13:18,170 INFO L628 ElimStorePlain]: treesize reduction 630, result has 19.3 percent of original size [2021-06-05 22:13:18,174 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 4 treesize of output 2 [2021-06-05 22:13:18,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,237 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1229 vanished before elimination [2021-06-05 22:13:18,240 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 3 treesize of output 1 [2021-06-05 22:13:18,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,303 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 6 treesize of output 2 [2021-06-05 22:13:18,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1234 vanished before elimination [2021-06-05 22:13:18,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1235 vanished before elimination [2021-06-05 22:13:18,375 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 3 treesize of output 1 [2021-06-05 22:13:18,376 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,433 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1226 vanished before elimination [2021-06-05 22:13:18,435 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 5 treesize of output 1 [2021-06-05 22:13:18,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,490 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1227 vanished before elimination [2021-06-05 22:13:18,490 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1228 vanished before elimination [2021-06-05 22:13:18,493 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 6 treesize of output 2 [2021-06-05 22:13:18,494 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,548 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 3 treesize of output 1 [2021-06-05 22:13:18,549 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,600 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1230 vanished before elimination [2021-06-05 22:13:18,600 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1231 vanished before elimination [2021-06-05 22:13:18,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 16 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:18,602 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 20 variables, input treesize:893, output treesize:105 [2021-06-05 22:13:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:18,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339972058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:18,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:18,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:13:18,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072183822] [2021-06-05 22:13:18,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:13:18,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:13:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:18,732 INFO L87 Difference]: Start difference. First operand 976 states and 3467 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:19,163 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 22:13:19,518 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2021-06-05 22:13:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:19,841 INFO L93 Difference]: Finished difference Result 1237 states and 4160 transitions. [2021-06-05 22:13:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:13:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:19,843 INFO L225 Difference]: With dead ends: 1237 [2021-06-05 22:13:19,844 INFO L226 Difference]: Without dead ends: 1192 [2021-06-05 22:13:19,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1693.7ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:13:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-06-05 22:13:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 982. [2021-06-05 22:13:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.5565749235474007) internal successors, (3489), 981 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3489 transitions. [2021-06-05 22:13:19,854 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3489 transitions. Word has length 20 [2021-06-05 22:13:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:19,854 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3489 transitions. [2021-06-05 22:13:19,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3489 transitions. [2021-06-05 22:13:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:19,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:19,856 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:20,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23627,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:20,056 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:20,056 INFO L82 PathProgramCache]: Analyzing trace with hash -196192774, now seen corresponding path program 133 times [2021-06-05 22:13:20,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:20,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250299031] [2021-06-05 22:13:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:20,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250299031] [2021-06-05 22:13:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250299031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640102457] [2021-06-05 22:13:20,232 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:13:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:20,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:20,710 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:20,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,969 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-06-05 22:13:20,969 INFO L628 ElimStorePlain]: treesize reduction 230, result has 54.1 percent of original size [2021-06-05 22:13:20,969 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1244 vanished before elimination [2021-06-05 22:13:20,973 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 5 treesize of output 1 [2021-06-05 22:13:20,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,086 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 22:13:21,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:21,090 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 3 treesize of output 1 [2021-06-05 22:13:21,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,201 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 22:13:21,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:21,204 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 3 treesize of output 1 [2021-06-05 22:13:21,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,316 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 22:13:21,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:21,320 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 5 treesize of output 1 [2021-06-05 22:13:21,321 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,511 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 22:13:21,512 INFO L628 ElimStorePlain]: treesize reduction 39, result has 84.7 percent of original size [2021-06-05 22:13:21,512 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:13:21,512 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1251 vanished before elimination [2021-06-05 22:13:21,516 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 4 treesize of output 2 [2021-06-05 22:13:21,517 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,520 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 4 treesize of output 2 [2021-06-05 22:13:21,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:21,611 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1242 vanished before elimination [2021-06-05 22:13:21,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 10 dim-1 vars, End of recursive call: 2 dim-0 vars, and 6 xjuncts. [2021-06-05 22:13:21,614 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 13 variables, input treesize:547, output treesize:208 [2021-06-05 22:13:23,484 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1258], 6=[ends_with_10], 10=[v_prenex_1257], 21=[ends_with_2]} [2021-06-05 22:13:23,491 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 3 treesize of output 1 [2021-06-05 22:13:23,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:23,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:23,499 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:13:23,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:23,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:23,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:23,513 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:13:23,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:23,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:23,520 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:13:23,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:23,527 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,867 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 78 [2021-06-05 22:13:23,867 INFO L628 ElimStorePlain]: treesize reduction 1000, result has 21.4 percent of original size [2021-06-05 22:13:23,871 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 4 treesize of output 2 [2021-06-05 22:13:23,872 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,876 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 4 treesize of output 2 [2021-06-05 22:13:23,877 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,880 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 4 treesize of output 2 [2021-06-05 22:13:23,881 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,885 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 4 treesize of output 2 [2021-06-05 22:13:23,886 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:23,890 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 5 treesize of output 1 [2021-06-05 22:13:23,890 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,000 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 22:13:24,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:24,004 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 3 treesize of output 1 [2021-06-05 22:13:24,005 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,008 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 3 treesize of output 1 [2021-06-05 22:13:24,009 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,111 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 22:13:24,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:24,116 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 5 treesize of output 1 [2021-06-05 22:13:24,117 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,120 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 4 treesize of output 2 [2021-06-05 22:13:24,121 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,124 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 3 treesize of output 1 [2021-06-05 22:13:24,125 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,129 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 6 treesize of output 2 [2021-06-05 22:13:24,129 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,133 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 6 treesize of output 2 [2021-06-05 22:13:24,134 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:24,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:13:24,231 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 9 variables, input treesize:1474, output treesize:179 [2021-06-05 22:13:24,381 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 22:13:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:24,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640102457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:24,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:24,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:13:24,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857122427] [2021-06-05 22:13:24,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:13:24,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:13:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:24,535 INFO L87 Difference]: Start difference. First operand 982 states and 3489 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:24,918 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 22:13:25,111 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 22:13:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:25,166 INFO L93 Difference]: Finished difference Result 1079 states and 3748 transitions. [2021-06-05 22:13:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:13:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:25,168 INFO L225 Difference]: With dead ends: 1079 [2021-06-05 22:13:25,168 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 22:13:25,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:13:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 22:13:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 982. [2021-06-05 22:13:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.5565749235474007) internal successors, (3489), 981 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3489 transitions. [2021-06-05 22:13:25,178 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3489 transitions. Word has length 20 [2021-06-05 22:13:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:25,178 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3489 transitions. [2021-06-05 22:13:25,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3489 transitions. [2021-06-05 22:13:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:25,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:25,179 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:25,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23943 [2021-06-05 22:13:25,380 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2073280044, now seen corresponding path program 134 times [2021-06-05 22:13:25,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:25,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479221222] [2021-06-05 22:13:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:25,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:25,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479221222] [2021-06-05 22:13:25,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479221222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:25,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93248397] [2021-06-05 22:13:25,684 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:25,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:25,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:13:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:26,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,321 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 22:13:26,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,328 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:26,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,336 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:13:26,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,342 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:26,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,743 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2021-06-05 22:13:26,743 INFO L628 ElimStorePlain]: treesize reduction 332, result has 52.0 percent of original size [2021-06-05 22:13:26,748 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 4 treesize of output 2 [2021-06-05 22:13:26,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,753 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 4 treesize of output 2 [2021-06-05 22:13:26,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,926 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 22:13:26,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:26,931 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 6 treesize of output 2 [2021-06-05 22:13:26,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,936 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 6 treesize of output 2 [2021-06-05 22:13:26,937 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:27,103 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 22:13:27,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:27,108 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 3 treesize of output 1 [2021-06-05 22:13:27,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:27,113 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 3 treesize of output 1 [2021-06-05 22:13:27,113 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:27,276 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 22:13:27,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:27,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-06-05 22:13:27,287 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:813, output treesize:333 [2021-06-05 22:13:27,473 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 22:13:27,843 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 84 [2021-06-05 22:13:29,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:29,227 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:29,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:29,237 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:13:29,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:29,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:29,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:29,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:29,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:29,589 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 102 [2021-06-05 22:13:29,590 INFO L628 ElimStorePlain]: treesize reduction 816, result has 23.1 percent of original size [2021-06-05 22:13:29,595 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 5 treesize of output 1 [2021-06-05 22:13:29,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:29,701 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 22:13:29,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:29,706 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 6 treesize of output 2 [2021-06-05 22:13:29,707 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:29,809 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:13:29,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:29,815 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 3 treesize of output 1 [2021-06-05 22:13:29,815 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:29,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:29,920 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 6 treesize of output 2 [2021-06-05 22:13:29,921 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,023 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 5 treesize of output 1 [2021-06-05 22:13:30,024 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,124 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 3 treesize of output 1 [2021-06-05 22:13:30,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,223 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 4 treesize of output 2 [2021-06-05 22:13:30,224 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,320 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 4 treesize of output 2 [2021-06-05 22:13:30,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,415 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 5 treesize of output 1 [2021-06-05 22:13:30,416 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,508 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 6 treesize of output 2 [2021-06-05 22:13:30,509 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,599 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 3 treesize of output 1 [2021-06-05 22:13:30,600 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:30,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:30,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:13:30,687 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:1213, output treesize:152 [2021-06-05 22:13:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:30,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93248397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:30,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:30,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:13:30,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060023228] [2021-06-05 22:13:30,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:13:30,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:30,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:13:30,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:13:30,986 INFO L87 Difference]: Start difference. First operand 982 states and 3489 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:13:31,930 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 97 [2021-06-05 22:13:32,354 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 22:13:32,567 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-05 22:13:32,768 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-06-05 22:13:32,995 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-05 22:13:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:33,022 INFO L93 Difference]: Finished difference Result 1272 states and 4270 transitions. [2021-06-05 22:13:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:13:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:13:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:33,024 INFO L225 Difference]: With dead ends: 1272 [2021-06-05 22:13:33,024 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 22:13:33,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2461.2ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:13:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 22:13:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 984. [2021-06-05 22:13:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.558494404883011) internal successors, (3498), 983 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3498 transitions. [2021-06-05 22:13:33,035 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3498 transitions. Word has length 20 [2021-06-05 22:13:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:33,035 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3498 transitions. [2021-06-05 22:13:33,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:13:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3498 transitions. [2021-06-05 22:13:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:33,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:33,036 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:33,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24206 [2021-06-05 22:13:33,237 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:33,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash -888198064, now seen corresponding path program 135 times [2021-06-05 22:13:33,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:33,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201666736] [2021-06-05 22:13:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:33,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:33,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201666736] [2021-06-05 22:13:33,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201666736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:33,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037298813] [2021-06-05 22:13:33,490 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:33,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:13:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:33,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:13:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:34,101 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_1286], 15=[v_prenex_1288, ends_with_2]} [2021-06-05 22:13:34,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:34,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:34,110 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:34,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:34,120 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:13:34,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:34,129 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:13:34,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:34,137 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:34,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,779 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 111 [2021-06-05 22:13:34,779 INFO L628 ElimStorePlain]: treesize reduction 657, result has 44.9 percent of original size [2021-06-05 22:13:34,785 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 6 treesize of output 2 [2021-06-05 22:13:34,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,791 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 4 treesize of output 2 [2021-06-05 22:13:34,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,797 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 6 treesize of output 2 [2021-06-05 22:13:34,798 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,804 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 4 treesize of output 2 [2021-06-05 22:13:34,804 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,810 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 6 treesize of output 2 [2021-06-05 22:13:34,810 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,816 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 4 treesize of output 2 [2021-06-05 22:13:34,816 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,068 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 22:13:35,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:35,074 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 3 treesize of output 1 [2021-06-05 22:13:35,075 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,080 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 3 treesize of output 1 [2021-06-05 22:13:35,081 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,086 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 5 treesize of output 1 [2021-06-05 22:13:35,086 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,330 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 22:13:35,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:35,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 11 xjuncts. [2021-06-05 22:13:35,346 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 10 variables, input treesize:1311, output treesize:495 [2021-06-05 22:13:35,691 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 129 [2021-06-05 22:13:36,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:36,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:36,807 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:36,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:36,819 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:13:36,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,421 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 139 [2021-06-05 22:13:37,422 INFO L628 ElimStorePlain]: treesize reduction 1571, result has 18.9 percent of original size [2021-06-05 22:13:37,429 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 4 treesize of output 2 [2021-06-05 22:13:37,430 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,611 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 22:13:37,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:37,617 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 3 treesize of output 1 [2021-06-05 22:13:37,618 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,804 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 22:13:37,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:37,811 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 3 treesize of output 1 [2021-06-05 22:13:37,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,985 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 22:13:37,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:37,991 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 6 treesize of output 2 [2021-06-05 22:13:37,992 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:38,161 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:13:38,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:38,167 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 5 treesize of output 1 [2021-06-05 22:13:38,168 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:38,339 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 22:13:38,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:38,345 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 3 treesize of output 1 [2021-06-05 22:13:38,346 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:38,514 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 22:13:38,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:38,520 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 4 treesize of output 2 [2021-06-05 22:13:38,521 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:38,685 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 22:13:38,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:38,691 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 3 treesize of output 1 [2021-06-05 22:13:38,692 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:38,852 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 22:13:38,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:38,858 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 5 treesize of output 1 [2021-06-05 22:13:38,859 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:39,017 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 22:13:39,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:39,023 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 3 treesize of output 1 [2021-06-05 22:13:39,024 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:39,179 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 22:13:39,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:39,185 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 4 treesize of output 2 [2021-06-05 22:13:39,186 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:39,340 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 22:13:39,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:39,345 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 4 treesize of output 2 [2021-06-05 22:13:39,346 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:39,499 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 22:13:39,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:39,505 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 4 treesize of output 2 [2021-06-05 22:13:39,506 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:39,667 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 22:13:39,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:39,672 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 3 treesize of output 1 [2021-06-05 22:13:39,673 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:39,822 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 22:13:39,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:39,827 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 6 treesize of output 2 [2021-06-05 22:13:39,828 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:39,973 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 22:13:39,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:39,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:13:39,978 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 24 variables, input treesize:2177, output treesize:245 [2021-06-05 22:13:40,272 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 22:13:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:40,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037298813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:40,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:40,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:13:40,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857384007] [2021-06-05 22:13:40,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:13:40,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:40,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:13:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:40,527 INFO L87 Difference]: Start difference. First operand 984 states and 3498 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:41,803 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 22:13:42,127 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 22:13:42,440 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 22:13:42,935 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 22:13:43,282 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-06-05 22:13:43,613 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-06-05 22:13:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:43,633 INFO L93 Difference]: Finished difference Result 1448 states and 4767 transitions. [2021-06-05 22:13:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:13:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:43,635 INFO L225 Difference]: With dead ends: 1448 [2021-06-05 22:13:43,635 INFO L226 Difference]: Without dead ends: 1373 [2021-06-05 22:13:43,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3796.8ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:13:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-05 22:13:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 983. [2021-06-05 22:13:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 3.5570264765784114) internal successors, (3493), 982 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 3493 transitions. [2021-06-05 22:13:43,646 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 3493 transitions. Word has length 20 [2021-06-05 22:13:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:43,647 INFO L482 AbstractCegarLoop]: Abstraction has 983 states and 3493 transitions. [2021-06-05 22:13:43,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 3493 transitions. [2021-06-05 22:13:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:43,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:43,648 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:43,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24866 [2021-06-05 22:13:43,848 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1846134258, now seen corresponding path program 136 times [2021-06-05 22:13:43,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:43,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624748778] [2021-06-05 22:13:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:44,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:44,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624748778] [2021-06-05 22:13:44,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624748778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:44,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823684643] [2021-06-05 22:13:44,078 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:44,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:44,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:13:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:44,355 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 22:13:44,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,781 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:13:44,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,787 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:44,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,793 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:13:44,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,799 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:13:44,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:44,805 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:13:44,805 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:45,111 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2021-06-05 22:13:45,111 INFO L628 ElimStorePlain]: treesize reduction 284, result has 51.8 percent of original size [2021-06-05 22:13:45,116 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 5 treesize of output 1 [2021-06-05 22:13:45,117 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:45,121 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 5 treesize of output 1 [2021-06-05 22:13:45,122 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:45,252 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 22:13:45,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:45,257 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 6 treesize of output 2 [2021-06-05 22:13:45,258 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:45,261 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 6 treesize of output 2 [2021-06-05 22:13:45,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:45,266 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 6 treesize of output 2 [2021-06-05 22:13:45,267 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:45,393 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 22:13:45,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:45,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 7 xjuncts. [2021-06-05 22:13:45,400 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:745, output treesize:277 [2021-06-05 22:13:45,626 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-05 22:13:45,853 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 22:13:46,973 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, ends_with_6, v_prenex_1317, v_prenex_1328, v_prenex_1318, v_prenex_1319, v_prenex_1320, v_prenex_1321, v_prenex_1333, v_prenex_1322, v_prenex_1334, v_prenex_1323, v_prenex_1324, v_prenex_1325, v_prenex_1316, v_prenex_1327], 10=[v_prenex_1331, v_prenex_1330]} [2021-06-05 22:13:46,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:46,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:46,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:46,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,191 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 65 [2021-06-05 22:13:47,191 INFO L628 ElimStorePlain]: treesize reduction 536, result has 22.4 percent of original size [2021-06-05 22:13:47,192 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:13:47,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1317 vanished before elimination [2021-06-05 22:13:47,195 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 3 treesize of output 1 [2021-06-05 22:13:47,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,259 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1318 vanished before elimination [2021-06-05 22:13:47,259 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1319 vanished before elimination [2021-06-05 22:13:47,259 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1320 vanished before elimination [2021-06-05 22:13:47,259 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1321 vanished before elimination [2021-06-05 22:13:47,263 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 3 treesize of output 1 [2021-06-05 22:13:47,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1322 vanished before elimination [2021-06-05 22:13:47,330 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 4 treesize of output 2 [2021-06-05 22:13:47,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,391 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1323 vanished before elimination [2021-06-05 22:13:47,394 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 4 treesize of output 2 [2021-06-05 22:13:47,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,457 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 4 treesize of output 2 [2021-06-05 22:13:47,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,513 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1316 vanished before elimination [2021-06-05 22:13:47,516 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 3 treesize of output 1 [2021-06-05 22:13:47,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,575 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 5 treesize of output 1 [2021-06-05 22:13:47,576 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,633 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 6 treesize of output 2 [2021-06-05 22:13:47,634 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 18 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:47,718 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 26 variables, input treesize:784, output treesize:107 [2021-06-05 22:13:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:47,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823684643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:47,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:47,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:13:47,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307497437] [2021-06-05 22:13:47,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:13:47,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:47,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:13:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:47,871 INFO L87 Difference]: Start difference. First operand 983 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,187 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 22:13:48,543 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-06-05 22:13:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:48,726 INFO L93 Difference]: Finished difference Result 1156 states and 3949 transitions. [2021-06-05 22:13:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:13:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:48,728 INFO L225 Difference]: With dead ends: 1156 [2021-06-05 22:13:48,728 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:13:48,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1503.4ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:13:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:13:48,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 987. [2021-06-05 22:13:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.554766734279919) internal successors, (3505), 986 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3505 transitions. [2021-06-05 22:13:48,739 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3505 transitions. Word has length 20 [2021-06-05 22:13:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:48,739 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3505 transitions. [2021-06-05 22:13:48,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3505 transitions. [2021-06-05 22:13:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:48,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:48,740 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:48,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25316,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:48,941 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1125010780, now seen corresponding path program 137 times [2021-06-05 22:13:48,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:48,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417992278] [2021-06-05 22:13:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:49,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:49,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417992278] [2021-06-05 22:13:49,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417992278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:49,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032945619] [2021-06-05 22:13:49,114 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:49,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:49,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:49,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:13:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:49,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032945619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:49,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:49,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:13:49,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289715958] [2021-06-05 22:13:49,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:13:49,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:13:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:49,574 INFO L87 Difference]: Start difference. First operand 987 states and 3505 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:13:50,229 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 22:13:50,506 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-05 22:13:51,240 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 22:13:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:51,263 INFO L93 Difference]: Finished difference Result 1298 states and 4377 transitions. [2021-06-05 22:13:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:13:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-06-05 22:13:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:51,265 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 22:13:51,265 INFO L226 Difference]: Without dead ends: 1253 [2021-06-05 22:13:51,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1718.8ms TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:13:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-06-05 22:13:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 987. [2021-06-05 22:13:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.554766734279919) internal successors, (3505), 986 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3505 transitions. [2021-06-05 22:13:51,277 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3505 transitions. Word has length 20 [2021-06-05 22:13:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:51,277 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3505 transitions. [2021-06-05 22:13:51,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 22:13:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3505 transitions. [2021-06-05 22:13:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:51,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:51,278 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:51,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25668 [2021-06-05 22:13:51,479 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash -818088028, now seen corresponding path program 138 times [2021-06-05 22:13:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:51,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813826731] [2021-06-05 22:13:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:51,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813826731] [2021-06-05 22:13:51,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813826731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146319751] [2021-06-05 22:13:51,730 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:51,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:13:51,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:51,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:13:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:51,996 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 22:13:52,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:52,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:52,423 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:13:52,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:52,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:52,431 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:13:52,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,438 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 3 treesize of output 1 [2021-06-05 22:13:52,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,445 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 4 treesize of output 2 [2021-06-05 22:13:52,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,453 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 4 treesize of output 2 [2021-06-05 22:13:52,453 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:52,461 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:13:52,461 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,468 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 6 treesize of output 2 [2021-06-05 22:13:52,469 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,957 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 127 [2021-06-05 22:13:52,957 INFO L628 ElimStorePlain]: treesize reduction 166, result has 76.1 percent of original size [2021-06-05 22:13:52,963 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 6 treesize of output 2 [2021-06-05 22:13:52,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,970 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 6 treesize of output 2 [2021-06-05 22:13:52,970 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,976 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 6 treesize of output 2 [2021-06-05 22:13:52,977 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,194 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 22:13:53,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:53,199 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 3 treesize of output 1 [2021-06-05 22:13:53,200 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,205 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 3 treesize of output 1 [2021-06-05 22:13:53,206 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,424 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 22:13:53,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:53,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 12 xjuncts. [2021-06-05 22:13:53,438 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:777, output treesize:495 [2021-06-05 22:13:53,768 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 116 [2021-06-05 22:13:56,097 INFO L446 ElimStorePlain]: Different costs {10=[ends_with_6, v_prenex_1360, v_prenex_1372, v_prenex_1351], 15=[v_prenex_1359, v_prenex_1371], 55=[ends_with_2]} [2021-06-05 22:13:56,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:56,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,124 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 4 treesize of output 2 [2021-06-05 22:13:56,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,138 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 4 treesize of output 2 [2021-06-05 22:13:56,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,152 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 4 treesize of output 2 [2021-06-05 22:13:56,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:56,166 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:56,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:56,179 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:13:56,180 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:56,193 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:13:56,194 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,814 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 150 [2021-06-05 22:13:56,815 INFO L628 ElimStorePlain]: treesize reduction 754, result has 43.9 percent of original size [2021-06-05 22:13:56,822 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 6 treesize of output 2 [2021-06-05 22:13:56,823 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,830 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 6 treesize of output 2 [2021-06-05 22:13:56,831 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,837 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 4 treesize of output 2 [2021-06-05 22:13:56,838 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,097 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-05 22:13:57,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:57,105 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 3 treesize of output 1 [2021-06-05 22:13:57,106 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,112 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 3 treesize of output 1 [2021-06-05 22:13:57,113 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,374 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-05 22:13:57,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:57,381 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 5 treesize of output 1 [2021-06-05 22:13:57,382 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,388 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 5 treesize of output 1 [2021-06-05 22:13:57,389 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,395 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 5 treesize of output 1 [2021-06-05 22:13:57,396 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,633 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 22:13:57,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:57,640 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 5 treesize of output 1 [2021-06-05 22:13:57,641 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,647 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 5 treesize of output 1 [2021-06-05 22:13:57,648 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,654 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 5 treesize of output 1 [2021-06-05 22:13:57,655 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,885 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 22:13:57,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:57,892 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 3 treesize of output 1 [2021-06-05 22:13:57,893 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,898 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 3 treesize of output 1 [2021-06-05 22:13:57,899 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,124 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-05 22:13:58,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:58,131 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 4 treesize of output 2 [2021-06-05 22:13:58,132 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,138 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 6 treesize of output 2 [2021-06-05 22:13:58,139 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,145 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 4 treesize of output 2 [2021-06-05 22:13:58,146 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,153 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 4 treesize of output 2 [2021-06-05 22:13:58,153 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,160 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 4 treesize of output 2 [2021-06-05 22:13:58,160 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,166 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 4 treesize of output 2 [2021-06-05 22:13:58,167 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,173 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 6 treesize of output 2 [2021-06-05 22:13:58,174 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,179 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 6 treesize of output 2 [2021-06-05 22:13:58,180 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,584 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2021-06-05 22:13:58,585 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 22:13:58,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 29 dim-0 vars, 7 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 22:13:58,591 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 36 variables, input treesize:1485, output treesize:401 [2021-06-05 22:13:58,803 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-05 22:13:58,994 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 22:13:59,151 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 22:13:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:59,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146319751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:59,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:59,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:13:59,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759655273] [2021-06-05 22:13:59,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:13:59,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:59,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:13:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:13:59,242 INFO L87 Difference]: Start difference. First operand 987 states and 3505 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:13:59,504 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 22:13:59,707 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 22:13:59,914 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-06-05 22:14:00,164 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 22:14:00,774 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 122 [2021-06-05 22:14:01,121 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-06-05 22:14:01,469 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 117 [2021-06-05 22:14:01,881 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 22:14:02,138 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 50 [2021-06-05 22:14:02,430 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2021-06-05 22:14:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:02,473 INFO L93 Difference]: Finished difference Result 1265 states and 4290 transitions. [2021-06-05 22:14:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:14:02,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:14:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:02,475 INFO L225 Difference]: With dead ends: 1265 [2021-06-05 22:14:02,475 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 22:14:02,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3964.8ms TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:14:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 22:14:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 987. [2021-06-05 22:14:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.554766734279919) internal successors, (3505), 986 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3505 transitions. [2021-06-05 22:14:02,487 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3505 transitions. Word has length 20 [2021-06-05 22:14:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:02,487 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3505 transitions. [2021-06-05 22:14:02,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:14:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3505 transitions. [2021-06-05 22:14:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:14:02,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:02,488 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:02,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25687 [2021-06-05 22:14:02,689 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -401078832, now seen corresponding path program 139 times [2021-06-05 22:14:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:02,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976722089] [2021-06-05 22:14:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:02,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:02,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976722089] [2021-06-05 22:14:02,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976722089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:02,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473725220] [2021-06-05 22:14:02,940 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:14:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:03,176 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 5 treesize of output 1 [2021-06-05 22:14:03,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,181 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 6 treesize of output 2 [2021-06-05 22:14:03,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,186 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 3 treesize of output 1 [2021-06-05 22:14:03,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,191 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 6 treesize of output 2 [2021-06-05 22:14:03,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,196 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 6 treesize of output 2 [2021-06-05 22:14:03,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,201 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 4 treesize of output 2 [2021-06-05 22:14:03,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:03,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,211 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 5 treesize of output 1 [2021-06-05 22:14:03,212 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,216 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 6 treesize of output 2 [2021-06-05 22:14:03,217 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,221 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 5 treesize of output 1 [2021-06-05 22:14:03,222 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,226 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 6 treesize of output 2 [2021-06-05 22:14:03,227 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,231 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 6 treesize of output 2 [2021-06-05 22:14:03,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:03,236 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:03,587 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 22:14:03,587 INFO L628 ElimStorePlain]: treesize reduction 41, result has 90.6 percent of original size [2021-06-05 22:14:03,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 10 xjuncts. [2021-06-05 22:14:03,592 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 2 variables, input treesize:592, output treesize:395 [2021-06-05 22:14:03,917 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2021-06-05 22:14:06,561 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_1387, v_prenex_1378, v_prenex_1379, v_prenex_1380, v_prenex_1381, v_prenex_1382, v_prenex_1383, v_prenex_1384], 21=[v_prenex_1397, ends_with_2, ends_with_10, v_prenex_1395], 28=[v_prenex_1389], 36=[v_prenex_1391, v_prenex_1392]} [2021-06-05 22:14:06,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:06,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:06,573 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:14:06,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:06,585 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:06,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:07,367 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 132 [2021-06-05 22:14:07,367 INFO L628 ElimStorePlain]: treesize reduction 1698, result has 21.8 percent of original size [2021-06-05 22:14:07,374 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 6 treesize of output 2 [2021-06-05 22:14:07,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:07,618 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 22:14:07,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:07,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1379 vanished before elimination [2021-06-05 22:14:07,625 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 5 treesize of output 1 [2021-06-05 22:14:07,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:07,867 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 22:14:07,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:07,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1381 vanished before elimination [2021-06-05 22:14:07,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1382 vanished before elimination [2021-06-05 22:14:07,874 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 6 treesize of output 2 [2021-06-05 22:14:07,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,113 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 22:14:08,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:08,113 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1384 vanished before elimination [2021-06-05 22:14:08,119 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 6 treesize of output 2 [2021-06-05 22:14:08,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,125 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 4 treesize of output 2 [2021-06-05 22:14:08,126 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,368 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 22:14:08,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:08,374 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 5 treesize of output 1 [2021-06-05 22:14:08,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,380 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 5 treesize of output 1 [2021-06-05 22:14:08,380 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,605 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 22:14:08,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:08,610 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 6 treesize of output 2 [2021-06-05 22:14:08,611 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,617 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 6 treesize of output 2 [2021-06-05 22:14:08,617 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,834 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 22:14:08,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:08,839 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 4 treesize of output 2 [2021-06-05 22:14:08,840 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,845 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 4 treesize of output 2 [2021-06-05 22:14:08,846 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,062 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 22:14:09,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:09,068 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 5 treesize of output 1 [2021-06-05 22:14:09,069 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,075 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 5 treesize of output 1 [2021-06-05 22:14:09,075 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,081 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 3 treesize of output 1 [2021-06-05 22:14:09,082 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,087 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 3 treesize of output 1 [2021-06-05 22:14:09,088 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,448 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2021-06-05 22:14:09,449 INFO L628 ElimStorePlain]: treesize reduction 44, result has 89.0 percent of original size [2021-06-05 22:14:09,455 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 3 treesize of output 1 [2021-06-05 22:14:09,456 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,473 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 3 treesize of output 1 [2021-06-05 22:14:09,475 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,661 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 22:14:09,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:09,667 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 3 treesize of output 1 [2021-06-05 22:14:09,668 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,672 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 3 treesize of output 1 [2021-06-05 22:14:09,673 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,843 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 22:14:09,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:09,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 15 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 22:14:09,848 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 26 variables, input treesize:2231, output treesize:253 [2021-06-05 22:14:09,988 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 22:14:10,194 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 22:14:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473725220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:10,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:10,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:14:10,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152760756] [2021-06-05 22:14:10,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:10,351 INFO L87 Difference]: Start difference. First operand 987 states and 3505 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:14:11,485 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-06-05 22:14:11,773 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 22:14:12,187 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 22:14:12,611 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 22:14:13,000 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-06-05 22:14:13,333 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-06-05 22:14:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:13,366 INFO L93 Difference]: Finished difference Result 1400 states and 4620 transitions. [2021-06-05 22:14:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:14:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-06-05 22:14:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:13,368 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 22:14:13,368 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 22:14:13,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3523.9ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:14:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 22:14:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 988. [2021-06-05 22:14:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.5602836879432624) internal successors, (3514), 987 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3514 transitions. [2021-06-05 22:14:13,380 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3514 transitions. Word has length 20 [2021-06-05 22:14:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:13,380 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 3514 transitions. [2021-06-05 22:14:13,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 22:14:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3514 transitions. [2021-06-05 22:14:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:14:13,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:13,381 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:13,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25891,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:13,585 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 376101076, now seen corresponding path program 140 times [2021-06-05 22:14:13,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:13,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207927194] [2021-06-05 22:14:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:13,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:13,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207927194] [2021-06-05 22:14:13,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207927194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:13,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578663758] [2021-06-05 22:14:13,734 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:13,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:13,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:13,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:14:13,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:14,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:14,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,089 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:14:14,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,093 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:14:14,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,098 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:14,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,102 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 3 treesize of output 1 [2021-06-05 22:14:14,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:14,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,110 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:14,111 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,114 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:14:14,115 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:14,118 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,122 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:14:14,123 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,127 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:14,127 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:14,130 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,134 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:14,135 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:14,138 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:14,141 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:14:14,142 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:14,145 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:14,306 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 22:14:14,306 INFO L628 ElimStorePlain]: treesize reduction 40, result has 84.2 percent of original size [2021-06-05 22:14:14,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-06-05 22:14:14,309 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:626, output treesize:203 [2021-06-05 22:14:14,450 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 22:14:15,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,142 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:15,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:15,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:15,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,152 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:14:15,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,257 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-06-05 22:14:15,257 INFO L628 ElimStorePlain]: treesize reduction 160, result has 39.4 percent of original size [2021-06-05 22:14:15,257 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:14:15,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:14:15,258 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:353, output treesize:104 [2021-06-05 22:14:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:15,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578663758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:15,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:15,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:14:15,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089194141] [2021-06-05 22:14:15,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:14:15,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:14:15,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:15,383 INFO L87 Difference]: Start difference. First operand 988 states and 3514 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:15,953 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 22:14:16,089 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 22:14:16,323 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 22:14:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:16,349 INFO L93 Difference]: Finished difference Result 1308 states and 4466 transitions. [2021-06-05 22:14:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:14:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:14:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:16,351 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 22:14:16,351 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 22:14:16,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1351.1ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:14:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 22:14:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 991. [2021-06-05 22:14:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.5585858585858587) internal successors, (3523), 990 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3523 transitions. [2021-06-05 22:14:16,362 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3523 transitions. Word has length 20 [2021-06-05 22:14:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:16,363 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3523 transitions. [2021-06-05 22:14:16,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3523 transitions. [2021-06-05 22:14:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:14:16,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:16,364 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:16,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26248 [2021-06-05 22:14:16,564 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:16,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1859344518, now seen corresponding path program 141 times [2021-06-05 22:14:16,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:16,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257696007] [2021-06-05 22:14:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:16,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:16,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257696007] [2021-06-05 22:14:16,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257696007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:16,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206426606] [2021-06-05 22:14:16,734 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:16,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:14:16,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,660 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:14:17,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,670 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:17,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,675 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:17,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,706 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:17,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,711 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:14:17,712 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,716 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,720 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,728 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,733 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:14:17,734 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,738 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,742 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,746 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:14:17,747 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,751 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 22:14:17,752 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,757 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:17,758 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,764 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:14:17,765 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,771 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:17,772 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,777 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:17,784 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,789 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:18,042 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 22:14:18,043 INFO L628 ElimStorePlain]: treesize reduction 21, result has 90.0 percent of original size [2021-06-05 22:14:18,047 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 3 treesize of output 1 [2021-06-05 22:14:18,048 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:18,052 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 6 treesize of output 2 [2021-06-05 22:14:18,053 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:18,057 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 6 treesize of output 2 [2021-06-05 22:14:18,058 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:18,062 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 5 treesize of output 1 [2021-06-05 22:14:18,063 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:18,067 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 3 treesize of output 1 [2021-06-05 22:14:18,068 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:18,072 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 4 treesize of output 2 [2021-06-05 22:14:18,073 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:18,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:18,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:14:18,171 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 3 variables, input treesize:1029, output treesize:132 [2021-06-05 22:14:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:18,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206426606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:18,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:18,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:14:18,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157445291] [2021-06-05 22:14:18,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:14:18,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:18,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:14:18,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:18,388 INFO L87 Difference]: Start difference. First operand 991 states and 3523 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:19,481 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 22:14:19,883 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 22:14:20,079 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 22:14:20,447 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 22:14:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:20,478 INFO L93 Difference]: Finished difference Result 1336 states and 4459 transitions. [2021-06-05 22:14:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:14:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:14:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:20,481 INFO L225 Difference]: With dead ends: 1336 [2021-06-05 22:14:20,481 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 22:14:20,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2152.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:14:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 22:14:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 995. [2021-06-05 22:14:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.558350100603622) internal successors, (3537), 994 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3537 transitions. [2021-06-05 22:14:20,492 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3537 transitions. Word has length 20 [2021-06-05 22:14:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:20,492 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 3537 transitions. [2021-06-05 22:14:20,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3537 transitions. [2021-06-05 22:14:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:14:20,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:20,493 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:20,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26461,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:20,694 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash -683853874, now seen corresponding path program 142 times [2021-06-05 22:14:20,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:20,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884134531] [2021-06-05 22:14:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:20,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:20,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884134531] [2021-06-05 22:14:20,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884134531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:20,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190727541] [2021-06-05 22:14:20,952 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:21,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:14:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:21,387 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2021-06-05 22:14:21,789 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_10], 15=[v_prenex_1406]} [2021-06-05 22:14:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,796 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:14:21,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,802 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 3 treesize of output 1 [2021-06-05 22:14:21,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,809 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:21,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,815 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:21,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,278 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2021-06-05 22:14:22,279 INFO L628 ElimStorePlain]: treesize reduction 298, result has 61.7 percent of original size [2021-06-05 22:14:22,284 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 3 treesize of output 1 [2021-06-05 22:14:22,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,290 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 6 treesize of output 2 [2021-06-05 22:14:22,291 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,295 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 4 treesize of output 2 [2021-06-05 22:14:22,296 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,301 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 4 treesize of output 2 [2021-06-05 22:14:22,302 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,307 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 4 treesize of output 2 [2021-06-05 22:14:22,308 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,313 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 4 treesize of output 2 [2021-06-05 22:14:22,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,319 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 6 treesize of output 2 [2021-06-05 22:14:22,319 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,324 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 4 treesize of output 2 [2021-06-05 22:14:22,325 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,329 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 6 treesize of output 2 [2021-06-05 22:14:22,330 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:22,699 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-06-05 22:14:22,699 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.3 percent of original size [2021-06-05 22:14:22,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 12 xjuncts. [2021-06-05 22:14:22,711 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:872, output treesize:430 [2021-06-05 22:14:23,038 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 92 [2021-06-05 22:14:25,487 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_2, ends_with_6, v_prenex_1416, v_prenex_1439, v_prenex_1417, v_prenex_1418, v_prenex_1429, v_prenex_1441, v_prenex_1430, v_prenex_1442, v_prenex_1445, v_prenex_1446, v_prenex_1413, v_prenex_1414, v_prenex_1437, v_prenex_1415], 10=[v_prenex_1420, v_prenex_1427, v_prenex_1428, v_prenex_1419]} [2021-06-05 22:14:25,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,504 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 22:14:25,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,522 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:14:25,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,541 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 22:14:25,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-05 22:14:25,561 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-06-05 22:14:25,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26732 [2021-06-05 22:14:25,781 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:14:25,783 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:14:25,784 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:14:25,784 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:14:25 BasicIcfg [2021-06-05 22:14:25,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:14:25,785 INFO L168 Benchmark]: Toolchain (without parser) took 733320.81 ms. Allocated memory was 362.8 MB in the beginning and 792.7 MB in the end (delta: 429.9 MB). Free memory was 342.1 MB in the beginning and 340.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 513.9 MB. Max. memory is 16.0 GB. [2021-06-05 22:14:25,785 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 362.8 MB. Free memory was 343.5 MB in the beginning and 343.5 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:14:25,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.07 ms. Allocated memory is still 362.8 MB. Free memory was 342.0 MB in the beginning and 340.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:14:25,785 INFO L168 Benchmark]: Boogie Preprocessor took 18.93 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:14:25,785 INFO L168 Benchmark]: RCFGBuilder took 579.61 ms. Allocated memory is still 362.8 MB. Free memory was 339.4 MB in the beginning and 329.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:14:25,785 INFO L168 Benchmark]: TraceAbstraction took 732679.05 ms. Allocated memory was 362.8 MB in the beginning and 792.7 MB in the end (delta: 429.9 MB). Free memory was 328.1 MB in the beginning and 340.3 MB in the end (delta: -12.2 MB). Peak memory consumption was 498.5 MB. Max. memory is 16.0 GB. [2021-06-05 22:14:25,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 362.8 MB. Free memory was 343.5 MB in the beginning and 343.5 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.07 ms. Allocated memory is still 362.8 MB. Free memory was 342.0 MB in the beginning and 340.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.93 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 579.61 ms. Allocated memory is still 362.8 MB. Free memory was 339.4 MB in the beginning and 329.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 732679.05 ms. Allocated memory was 362.8 MB in the beginning and 792.7 MB in the end (delta: 429.9 MB). Free memory was 328.1 MB in the beginning and 340.3 MB in the end (delta: -12.2 MB). Peak memory consumption was 498.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 288 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 732575.9ms, OverallIterations: 168, TraceHistogramMax: 1, EmptinessCheckTime: 186.3ms, AutomataDifference: 282159.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10450 SDtfs, 17242 SDslu, 66979 SDs, 0 SdLazy, 74871 SolverSat, 6656 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43715.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6453 GetRequests, 2005 SyntacticMatches, 170 SemanticMatches, 4278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32657 ImplicationChecksByTransitivity, 337478.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=995occurred in iteration=167, InterpolantAutomatonStates: 3117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1688.8ms AutomataMinimizationTime, 167 MinimizatonAttempts, 42796 StatesRemovedByMinimization, 163 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 898.1ms SsaConstructionTime, 2245.4ms SatisfiabilityAnalysisTime, 403644.3ms InterpolantComputationTime, 6115 NumberOfCodeBlocks, 6115 NumberOfCodeBlocksAsserted, 467 NumberOfCheckSat, 5803 ConstructedInterpolants, 214 QuantifiedInterpolants, 246909 SizeOfPredicates, 2139 NumberOfNonLiveVariables, 12068 ConjunctsInSsa, 5412 ConjunctsInUnsatCore, 312 InterpolantComputations, 22 PerfectInterpolantSequences, 18/872 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown