/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 05:10:58,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 05:10:58,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 05:10:58,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 05:10:59,018 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 [2021-04-15 05:10:59,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 05:10:59,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 05:10:59,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 05:10:59,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 05:10:59,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 05:10:59,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 05:10:59,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 05:10:59,042 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 05:10:59,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 05:10:59,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 05:10:59,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 05:10:59,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 05:10:59,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 05:10:59,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 05:10:59,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 05:10:59,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:10:59,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 05:10:59,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 05:10:59,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 05:10:59,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 05:10:59,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 05:10:59,044 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 05:10:59,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 05:10:59,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 05:10:59,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 05:10:59,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 05:10:59,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 05:10:59,361 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 05:10:59,366 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 05:10:59,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2021-04-15 05:10:59,367 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2021-04-15 05:10:59,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 05:10:59,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 05:10:59,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 05:10:59,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 05:10:59,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 05:10:59,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 05:10:59,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 05:10:59,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 05:10:59,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 05:10:59,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... [2021-04-15 05:10:59,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 05:10:59,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 05:10:59,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 05:10:59,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 05:10:59,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:10:59,483 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 05:10:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 05:10:59,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 05:10:59,483 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 05:10:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 05:10:59,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 05:10:59,483 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 05:10:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 05:10:59,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 05:10:59,484 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 05:10:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 05:10:59,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 05:10:59,484 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 05:10:59,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 05:10:59,625 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 05:10:59,626 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:10:59 BoogieIcfgContainer [2021-04-15 05:10:59,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 05:10:59,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 05:10:59,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 05:10:59,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 05:10:59,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:10:59" (1/2) ... [2021-04-15 05:10:59,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c86c3f and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:10:59, skipping insertion in model container [2021-04-15 05:10:59,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:10:59" (2/2) ... [2021-04-15 05:10:59,631 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2021-04-15 05:10:59,634 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 05:10:59,634 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 05:10:59,637 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 05:10:59,638 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 05:10:59,661 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 05:10:59,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 05:10:59,693 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 05:10:59,693 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 05:10:59,693 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 05:10:59,693 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 05:10:59,693 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 05:10:59,693 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 05:10:59,693 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 05:10:59,694 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 05:10:59,701 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-04-15 05:10:59,723 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 05:10:59,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:10:59,740 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:10:59,741 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:10:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:10:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-04-15 05:10:59,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:10:59,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248383561] [2021-04-15 05:10:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:10:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:10:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:59,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248383561] [2021-04-15 05:10:59,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:10:59,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 05:10:59,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787410026] [2021-04-15 05:10:59,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 05:10:59,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:10:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 05:10:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:10:59,929 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-04-15 05:10:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:10:59,971 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-04-15 05:10:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 05:10:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2021-04-15 05:10:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:10:59,986 INFO L225 Difference]: With dead ends: 217 [2021-04-15 05:10:59,986 INFO L226 Difference]: Without dead ends: 202 [2021-04-15 05:10:59,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:11:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-04-15 05:11:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-04-15 05:11:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-04-15 05:11:00,044 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-04-15 05:11:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:00,045 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-04-15 05:11:00,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-04-15 05:11:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-04-15 05:11:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 05:11:00,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:00,047 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:00,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 05:11:00,047 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:00,048 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-04-15 05:11:00,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:00,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030624980] [2021-04-15 05:11:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030624980] [2021-04-15 05:11:00,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:11:00,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:11:00,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569499474] [2021-04-15 05:11:00,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:11:00,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:11:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:11:00,082 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:00,110 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-04-15 05:11:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 05:11:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:11:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:00,111 INFO L225 Difference]: With dead ends: 158 [2021-04-15 05:11:00,111 INFO L226 Difference]: Without dead ends: 158 [2021-04-15 05:11:00,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:11:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-04-15 05:11:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-04-15 05:11:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-04-15 05:11:00,118 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-04-15 05:11:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:00,119 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-04-15 05:11:00,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-04-15 05:11:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 05:11:00,120 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:00,120 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:00,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 05:11:00,120 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-04-15 05:11:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:00,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948991987] [2021-04-15 05:11:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:00,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948991987] [2021-04-15 05:11:00,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:11:00,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:11:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379784922] [2021-04-15 05:11:00,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:11:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:11:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:11:00,153 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:00,194 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-04-15 05:11:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:11:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:11:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:00,197 INFO L225 Difference]: With dead ends: 183 [2021-04-15 05:11:00,197 INFO L226 Difference]: Without dead ends: 183 [2021-04-15 05:11:00,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:11:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-04-15 05:11:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-04-15 05:11:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-04-15 05:11:00,212 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-04-15 05:11:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:00,212 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-04-15 05:11:00,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-04-15 05:11:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:11:00,213 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:00,213 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:00,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 05:11:00,213 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-04-15 05:11:00,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:00,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654058050] [2021-04-15 05:11:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:00,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654058050] [2021-04-15 05:11:00,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95005460] [2021-04-15 05:11:00,567 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 [2021-04-15 05:11:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:11:00,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:00,936 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 23 treesize of output 15 [2021-04-15 05:11:00,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,942 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 18 treesize of output 12 [2021-04-15 05:11:00,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,948 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 16 treesize of output 10 [2021-04-15 05:11:00,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,952 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 5 treesize of output 3 [2021-04-15 05:11:00,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:00,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:11:00,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:120, output treesize:23 [2021-04-15 05:11:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:01,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:01,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:11:01,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836846335] [2021-04-15 05:11:01,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:01,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:01,029 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 05:11:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:01,257 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-04-15 05:11:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:11:01,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-04-15 05:11:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:01,260 INFO L225 Difference]: With dead ends: 330 [2021-04-15 05:11:01,260 INFO L226 Difference]: Without dead ends: 315 [2021-04-15 05:11:01,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:11:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-04-15 05:11:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-04-15 05:11:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-04-15 05:11:01,269 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-04-15 05:11:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:01,269 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-04-15 05:11:01,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 05:11:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-04-15 05:11:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:11:01,270 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:01,270 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:01,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:01,489 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-04-15 05:11:01,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:01,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624115846] [2021-04-15 05:11:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:01,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624115846] [2021-04-15 05:11:01,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330732831] [2021-04-15 05:11:01,718 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 [2021-04-15 05:11:01,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:01,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:11:01,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:01,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:01,941 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 05:11:01,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:01,954 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:11:01,955 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:11:01,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:01,965 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:11:01,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:11:01,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:01,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:01,974 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:11:01,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:02,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:02,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:11:02,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-04-15 05:11:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:02,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:02,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 05:11:02,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146389252] [2021-04-15 05:11:02,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:11:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:02,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:11:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:11:02,220 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:02,700 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-04-15 05:11:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:11:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:11:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:02,705 INFO L225 Difference]: With dead ends: 374 [2021-04-15 05:11:02,705 INFO L226 Difference]: Without dead ends: 359 [2021-04-15 05:11:02,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:11:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-04-15 05:11:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-04-15 05:11:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 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) [2021-04-15 05:11:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-04-15 05:11:02,713 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-04-15 05:11:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:02,713 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-04-15 05:11:02,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-04-15 05:11:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:11:02,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:02,714 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:02,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:02,931 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-04-15 05:11:02,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:02,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679495624] [2021-04-15 05:11:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679495624] [2021-04-15 05:11:03,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135331038] [2021-04-15 05:11:03,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:03,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:11:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 05:11:03,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:03,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:03,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:03,420 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 16 treesize of output 10 [2021-04-15 05:11:03,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:03,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:03,432 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 11 treesize of output 3 [2021-04-15 05:11:03,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:03,474 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-04-15 05:11:03,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:03,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 05:11:03,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:03,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:03,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:11:03,503 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-04-15 05:11:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:03,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:03,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 05:11:03,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879477733] [2021-04-15 05:11:03,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:03,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:03,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:03,551 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:03,748 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-04-15 05:11:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:11:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:11:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:03,750 INFO L225 Difference]: With dead ends: 296 [2021-04-15 05:11:03,750 INFO L226 Difference]: Without dead ends: 281 [2021-04-15 05:11:03,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:11:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-04-15 05:11:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-04-15 05:11:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-04-15 05:11:03,760 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-04-15 05:11:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:03,764 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-04-15 05:11:03,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-04-15 05:11:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:11:03,765 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:03,766 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:03,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 05:11:03,980 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-04-15 05:11:03,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:03,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146052515] [2021-04-15 05:11:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:04,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146052515] [2021-04-15 05:11:04,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526125022] [2021-04-15 05:11:04,150 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 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 [2021-04-15 05:11:04,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:11:04,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:11:04,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:04,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:04,350 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:11:04,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:04,361 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:11:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:11:04,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:04,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:04,459 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:11:04,460 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:11:04,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:04,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:04,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 05:11:04,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:04,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:04,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:11:04,544 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:122 [2021-04-15 05:11:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:04,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:04,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:11:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980928446] [2021-04-15 05:11:04,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:04,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:04,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:04,719 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:05,055 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-04-15 05:11:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:11:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:11:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:05,058 INFO L225 Difference]: With dead ends: 425 [2021-04-15 05:11:05,058 INFO L226 Difference]: Without dead ends: 410 [2021-04-15 05:11:05,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:11:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-04-15 05:11:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-04-15 05:11:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-04-15 05:11:05,066 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-04-15 05:11:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:05,068 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-04-15 05:11:05,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-04-15 05:11:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:05,069 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:05,069 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:05,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 05:11:05,288 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-04-15 05:11:05,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:05,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695453970] [2021-04-15 05:11:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:05,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695453970] [2021-04-15 05:11:05,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424456298] [2021-04-15 05:11:05,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:11:05,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:11:05,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:05,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:05,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:05,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:11:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747668330] [2021-04-15 05:11:05,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:05,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:05,448 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-04-15 05:11:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:05,834 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-04-15 05:11:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:11:05,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-04-15 05:11:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:05,838 INFO L225 Difference]: With dead ends: 619 [2021-04-15 05:11:05,838 INFO L226 Difference]: Without dead ends: 619 [2021-04-15 05:11:05,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:11:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-04-15 05:11:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-04-15 05:11:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-04-15 05:11:05,857 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-04-15 05:11:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:05,857 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-04-15 05:11:05,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-04-15 05:11:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-04-15 05:11:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:05,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:05,858 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:06,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 05:11:06,075 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:06,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:06,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-04-15 05:11:06,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:06,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310134277] [2021-04-15 05:11:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:06,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310134277] [2021-04-15 05:11:06,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95712387] [2021-04-15 05:11:06,114 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 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 [2021-04-15 05:11:06,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:11:06,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:06,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:06,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:06,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374534247] [2021-04-15 05:11:06,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:06,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:06,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:06,213 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:06,919 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-04-15 05:11:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:11:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:06,925 INFO L225 Difference]: With dead ends: 1078 [2021-04-15 05:11:06,925 INFO L226 Difference]: Without dead ends: 1078 [2021-04-15 05:11:06,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:11:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-04-15 05:11:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-04-15 05:11:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-04-15 05:11:06,939 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-04-15 05:11:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:06,939 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-04-15 05:11:06,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-04-15 05:11:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:06,941 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:06,941 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:07,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:07,159 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-04-15 05:11:07,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:07,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615321118] [2021-04-15 05:11:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615321118] [2021-04-15 05:11:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375714060] [2021-04-15 05:11:07,198 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 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 [2021-04-15 05:11:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:07,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:07,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:07,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:07,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946999690] [2021-04-15 05:11:07,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:07,293 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:07,948 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-04-15 05:11:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:11:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:07,953 INFO L225 Difference]: With dead ends: 951 [2021-04-15 05:11:07,953 INFO L226 Difference]: Without dead ends: 951 [2021-04-15 05:11:07,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:11:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-04-15 05:11:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-04-15 05:11:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-04-15 05:11:07,967 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-04-15 05:11:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:07,967 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-04-15 05:11:07,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-04-15 05:11:07,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:07,968 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:07,968 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:08,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 05:11:08,186 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-04-15 05:11:08,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:08,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610470008] [2021-04-15 05:11:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:08,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610470008] [2021-04-15 05:11:08,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937967774] [2021-04-15 05:11:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:11:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:08,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:08,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:11:08,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094702508] [2021-04-15 05:11:08,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:11:08,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:08,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:11:08,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:11:08,316 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:08,420 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-04-15 05:11:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:11:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:08,424 INFO L225 Difference]: With dead ends: 669 [2021-04-15 05:11:08,424 INFO L226 Difference]: Without dead ends: 663 [2021-04-15 05:11:08,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-04-15 05:11:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-04-15 05:11:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-04-15 05:11:08,437 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-04-15 05:11:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:08,437 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-04-15 05:11:08,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-04-15 05:11:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:08,439 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:08,439 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:08,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 05:11:08,653 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-04-15 05:11:08,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:08,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127707858] [2021-04-15 05:11:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:08,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127707858] [2021-04-15 05:11:08,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301977591] [2021-04-15 05:11:08,694 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 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 [2021-04-15 05:11:08,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:08,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:08,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:08,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:11:08,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589946073] [2021-04-15 05:11:08,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:08,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:08,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:08,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:08,829 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:08,994 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-04-15 05:11:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:11:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:08,997 INFO L225 Difference]: With dead ends: 710 [2021-04-15 05:11:08,997 INFO L226 Difference]: Without dead ends: 672 [2021-04-15 05:11:08,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:11:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-04-15 05:11:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-04-15 05:11:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-04-15 05:11:09,023 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-04-15 05:11:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:09,023 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-04-15 05:11:09,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-04-15 05:11:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:09,024 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:09,024 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:09,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 05:11:09,240 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-04-15 05:11:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:09,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201848687] [2021-04-15 05:11:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:09,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201848687] [2021-04-15 05:11:09,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928078747] [2021-04-15 05:11:09,269 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 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 [2021-04-15 05:11:09,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:09,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:09,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:11:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:09,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:09,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:11:09,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362891205] [2021-04-15 05:11:09,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:11:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:11:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:11:09,366 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:09,458 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-04-15 05:11:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:11:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:09,463 INFO L225 Difference]: With dead ends: 830 [2021-04-15 05:11:09,463 INFO L226 Difference]: Without dead ends: 830 [2021-04-15 05:11:09,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-04-15 05:11:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-04-15 05:11:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-04-15 05:11:09,478 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-04-15 05:11:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:09,478 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-04-15 05:11:09,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-04-15 05:11:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:09,479 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:09,479 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:09,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:09,684 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-04-15 05:11:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:09,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316728492] [2021-04-15 05:11:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:09,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316728492] [2021-04-15 05:11:09,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354435501] [2021-04-15 05:11:09,722 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 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 [2021-04-15 05:11:09,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:11:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:09,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:09,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:09,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:11:09,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073505862] [2021-04-15 05:11:09,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:11:09,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:09,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:11:09,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:11:09,814 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:10,118 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-04-15 05:11:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:11:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:10,124 INFO L225 Difference]: With dead ends: 1196 [2021-04-15 05:11:10,124 INFO L226 Difference]: Without dead ends: 1196 [2021-04-15 05:11:10,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:11:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-04-15 05:11:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-04-15 05:11:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 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) [2021-04-15 05:11:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-04-15 05:11:10,143 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-04-15 05:11:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:10,144 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-04-15 05:11:10,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-04-15 05:11:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:10,145 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:10,145 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:10,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-04-15 05:11:10,361 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-04-15 05:11:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:10,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160076972] [2021-04-15 05:11:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:10,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160076972] [2021-04-15 05:11:10,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993876045] [2021-04-15 05:11:10,396 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 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 [2021-04-15 05:11:10,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:11:10,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:10,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:10,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:10,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:11:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082237691] [2021-04-15 05:11:10,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:11:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:11:10,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:11:10,488 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:10,882 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-04-15 05:11:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:11:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:10,887 INFO L225 Difference]: With dead ends: 1492 [2021-04-15 05:11:10,887 INFO L226 Difference]: Without dead ends: 1492 [2021-04-15 05:11:10,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:11:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-04-15 05:11:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-04-15 05:11:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-04-15 05:11:10,907 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-04-15 05:11:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:10,907 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-04-15 05:11:10,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-04-15 05:11:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:10,908 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:10,908 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:11,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:11,124 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-04-15 05:11:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:11,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537502382] [2021-04-15 05:11:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537502382] [2021-04-15 05:11:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662520284] [2021-04-15 05:11:11,168 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:11:11,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:11,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:11,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:11,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:11,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:11:11,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075383499] [2021-04-15 05:11:11,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:11,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:11,274 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:11,490 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-04-15 05:11:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:11:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:11,495 INFO L225 Difference]: With dead ends: 1258 [2021-04-15 05:11:11,495 INFO L226 Difference]: Without dead ends: 1248 [2021-04-15 05:11:11,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:11:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-04-15 05:11:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-04-15 05:11:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-04-15 05:11:11,513 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-04-15 05:11:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:11,513 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-04-15 05:11:11,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-04-15 05:11:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:11,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:11,515 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:11,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-04-15 05:11:11,719 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:11,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-04-15 05:11:11,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:11,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841449154] [2021-04-15 05:11:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:11,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841449154] [2021-04-15 05:11:11,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675263916] [2021-04-15 05:11:11,759 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 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 [2021-04-15 05:11:11,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:11:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:11,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:11,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:11,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:11:11,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604296099] [2021-04-15 05:11:11,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:11,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:11,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:11,868 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 05:11:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:12,123 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-04-15 05:11:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:11:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-04-15 05:11:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:12,129 INFO L225 Difference]: With dead ends: 1329 [2021-04-15 05:11:12,129 INFO L226 Difference]: Without dead ends: 1329 [2021-04-15 05:11:12,129 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:11:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-04-15 05:11:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-04-15 05:11:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-04-15 05:11:12,145 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-04-15 05:11:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:12,146 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-04-15 05:11:12,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 05:11:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-04-15 05:11:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:12,147 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:12,147 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:12,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:12,363 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-04-15 05:11:12,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:12,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166954976] [2021-04-15 05:11:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166954976] [2021-04-15 05:11:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426228488] [2021-04-15 05:11:12,413 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 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 [2021-04-15 05:11:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:12,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:12,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:11:12,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591289278] [2021-04-15 05:11:12,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:11:12,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:12,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:11:12,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:11:12,496 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:12,849 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-04-15 05:11:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:11:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:12,855 INFO L225 Difference]: With dead ends: 1548 [2021-04-15 05:11:12,855 INFO L226 Difference]: Without dead ends: 1544 [2021-04-15 05:11:12,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:11:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-04-15 05:11:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-04-15 05:11:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-04-15 05:11:12,873 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-04-15 05:11:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:12,874 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-04-15 05:11:12,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-04-15 05:11:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:12,875 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:12,875 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:13,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 05:11:13,089 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-04-15 05:11:13,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:13,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932431240] [2021-04-15 05:11:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:13,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932431240] [2021-04-15 05:11:13,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763032803] [2021-04-15 05:11:13,122 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 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 [2021-04-15 05:11:13,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:13,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:13,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:13,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:13,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706440528] [2021-04-15 05:11:13,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:13,240 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:13,913 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-04-15 05:11:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:11:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:13,927 INFO L225 Difference]: With dead ends: 2734 [2021-04-15 05:11:13,927 INFO L226 Difference]: Without dead ends: 2734 [2021-04-15 05:11:13,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:11:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-04-15 05:11:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-04-15 05:11:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-04-15 05:11:13,962 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-04-15 05:11:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:13,962 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-04-15 05:11:13,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-04-15 05:11:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:13,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:13,964 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:14,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:14,165 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-04-15 05:11:14,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:14,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440013903] [2021-04-15 05:11:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:14,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440013903] [2021-04-15 05:11:14,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982518125] [2021-04-15 05:11:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:14,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:11:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:14,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:14,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:14,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:14,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213302831] [2021-04-15 05:11:14,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:14,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:14,307 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:14,963 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-04-15 05:11:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:11:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:14,971 INFO L225 Difference]: With dead ends: 2693 [2021-04-15 05:11:14,971 INFO L226 Difference]: Without dead ends: 2693 [2021-04-15 05:11:14,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:11:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-04-15 05:11:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-04-15 05:11:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-04-15 05:11:15,009 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-04-15 05:11:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:15,009 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-04-15 05:11:15,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-04-15 05:11:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:15,016 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:15,016 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:15,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 05:11:15,233 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-04-15 05:11:15,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:15,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475399572] [2021-04-15 05:11:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:15,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475399572] [2021-04-15 05:11:15,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801118412] [2021-04-15 05:11:15,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:15,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:11:15,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:15,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:15,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:15,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:15,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:11:15,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021740495] [2021-04-15 05:11:15,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:15,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:15,392 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:15,986 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-04-15 05:11:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:11:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-04-15 05:11:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:15,993 INFO L225 Difference]: With dead ends: 2677 [2021-04-15 05:11:15,993 INFO L226 Difference]: Without dead ends: 2677 [2021-04-15 05:11:15,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:11:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-04-15 05:11:16,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-04-15 05:11:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-04-15 05:11:16,022 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-04-15 05:11:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:16,023 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-04-15 05:11:16,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-04-15 05:11:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:16,026 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:16,026 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:16,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 05:11:16,241 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-04-15 05:11:16,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:16,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994043122] [2021-04-15 05:11:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:16,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994043122] [2021-04-15 05:11:16,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574994689] [2021-04-15 05:11:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:16,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:11:16,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:16,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:16,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:16,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:16,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:11:16,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780953013] [2021-04-15 05:11:16,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:16,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:16,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:16,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:16,360 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:16,850 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-04-15 05:11:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:11:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-04-15 05:11:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:16,855 INFO L225 Difference]: With dead ends: 2474 [2021-04-15 05:11:16,855 INFO L226 Difference]: Without dead ends: 2470 [2021-04-15 05:11:16,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:11:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-04-15 05:11:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-04-15 05:11:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-04-15 05:11:16,880 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-04-15 05:11:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:16,880 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-04-15 05:11:16,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-04-15 05:11:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:16,882 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:16,882 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:17,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 05:11:17,098 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-04-15 05:11:17,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:17,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901062853] [2021-04-15 05:11:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:17,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901062853] [2021-04-15 05:11:17,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289186730] [2021-04-15 05:11:17,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:17,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:11:17,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:17,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:17,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:17,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935384109] [2021-04-15 05:11:17,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:17,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:17,252 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:17,846 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-04-15 05:11:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:11:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 05:11:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:17,858 INFO L225 Difference]: With dead ends: 2514 [2021-04-15 05:11:17,858 INFO L226 Difference]: Without dead ends: 2514 [2021-04-15 05:11:17,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:11:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-04-15 05:11:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-04-15 05:11:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-04-15 05:11:17,884 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-04-15 05:11:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:17,884 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-04-15 05:11:17,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-04-15 05:11:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:17,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:17,887 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:18,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-04-15 05:11:18,101 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-04-15 05:11:18,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:18,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969368190] [2021-04-15 05:11:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:18,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969368190] [2021-04-15 05:11:18,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844984046] [2021-04-15 05:11:18,133 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:11:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:18,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:18,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:18,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:18,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065051424] [2021-04-15 05:11:18,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:18,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:18,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:18,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:18,228 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:18,822 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-04-15 05:11:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:11:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 05:11:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:18,828 INFO L225 Difference]: With dead ends: 2332 [2021-04-15 05:11:18,828 INFO L226 Difference]: Without dead ends: 2328 [2021-04-15 05:11:18,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:11:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-04-15 05:11:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-04-15 05:11:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-04-15 05:11:18,853 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-04-15 05:11:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:18,853 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-04-15 05:11:18,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-04-15 05:11:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:18,855 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:18,856 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:19,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:19,072 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-04-15 05:11:19,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:19,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774552251] [2021-04-15 05:11:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:19,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774552251] [2021-04-15 05:11:19,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559409851] [2021-04-15 05:11:19,097 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 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 [2021-04-15 05:11:19,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:11:19,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:19,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:11:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:19,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:19,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:11:19,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835761665] [2021-04-15 05:11:19,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:11:19,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:19,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:11:19,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:11:19,160 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:19,235 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-04-15 05:11:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:11:19,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:19,238 INFO L225 Difference]: With dead ends: 929 [2021-04-15 05:11:19,238 INFO L226 Difference]: Without dead ends: 929 [2021-04-15 05:11:19,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-04-15 05:11:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-04-15 05:11:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-04-15 05:11:19,252 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-04-15 05:11:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:19,252 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-04-15 05:11:19,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-04-15 05:11:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:19,254 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:19,254 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:19,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:19,467 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-04-15 05:11:19,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:19,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740531616] [2021-04-15 05:11:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:19,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740531616] [2021-04-15 05:11:19,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668032491] [2021-04-15 05:11:19,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:11:19,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:19,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:19,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:19,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 05:11:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457553636] [2021-04-15 05:11:19,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:11:19,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:11:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:11:19,575 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:19,826 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-04-15 05:11:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:11:19,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:19,830 INFO L225 Difference]: With dead ends: 1555 [2021-04-15 05:11:19,830 INFO L226 Difference]: Without dead ends: 1555 [2021-04-15 05:11:19,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:11:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-04-15 05:11:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-04-15 05:11:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-04-15 05:11:19,845 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-04-15 05:11:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:19,845 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-04-15 05:11:19,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-04-15 05:11:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:19,847 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:19,847 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:20,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 05:11:20,061 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-04-15 05:11:20,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:20,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124024410] [2021-04-15 05:11:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:20,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124024410] [2021-04-15 05:11:20,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800200804] [2021-04-15 05:11:20,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:20,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:11:20,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:20,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:20,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:11:20,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793874777] [2021-04-15 05:11:20,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:11:20,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:11:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:11:20,164 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:20,396 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-04-15 05:11:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:11:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:20,400 INFO L225 Difference]: With dead ends: 1605 [2021-04-15 05:11:20,400 INFO L226 Difference]: Without dead ends: 1605 [2021-04-15 05:11:20,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:11:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-04-15 05:11:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-04-15 05:11:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-04-15 05:11:20,420 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-04-15 05:11:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:20,421 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-04-15 05:11:20,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-04-15 05:11:20,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:20,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:20,423 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:20,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:20,637 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-04-15 05:11:20,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:20,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118071391] [2021-04-15 05:11:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:20,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118071391] [2021-04-15 05:11:20,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643311968] [2021-04-15 05:11:20,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:20,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:11:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:11:20,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:20,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:11:20,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749980812] [2021-04-15 05:11:20,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:11:20,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:11:20,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:11:20,725 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:20,910 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-04-15 05:11:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:11:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:20,914 INFO L225 Difference]: With dead ends: 1524 [2021-04-15 05:11:20,914 INFO L226 Difference]: Without dead ends: 1520 [2021-04-15 05:11:20,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:11:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-04-15 05:11:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-04-15 05:11:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-04-15 05:11:20,930 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-04-15 05:11:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:20,930 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-04-15 05:11:20,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-04-15 05:11:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:20,932 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:20,932 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:21,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-04-15 05:11:21,149 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-04-15 05:11:21,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:21,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375839684] [2021-04-15 05:11:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:21,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375839684] [2021-04-15 05:11:21,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055823871] [2021-04-15 05:11:21,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:21,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:11:21,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:21,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:21,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 05:11:21,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079815855] [2021-04-15 05:11:21,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:11:21,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:21,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:11:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:11:21,259 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:21,454 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-04-15 05:11:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:11:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:21,457 INFO L225 Difference]: With dead ends: 1508 [2021-04-15 05:11:21,457 INFO L226 Difference]: Without dead ends: 1496 [2021-04-15 05:11:21,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:11:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-04-15 05:11:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-04-15 05:11:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-04-15 05:11:21,472 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-04-15 05:11:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:21,472 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-04-15 05:11:21,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-04-15 05:11:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:21,474 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:21,474 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:21,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-15 05:11:21,689 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:21,689 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-04-15 05:11:21,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:21,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444447229] [2021-04-15 05:11:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:21,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444447229] [2021-04-15 05:11:21,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577719729] [2021-04-15 05:11:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:21,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:11:21,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:21,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:21,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:21,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168092363] [2021-04-15 05:11:21,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:21,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:21,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:21,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:21,821 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:22,320 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-04-15 05:11:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:11:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:22,325 INFO L225 Difference]: With dead ends: 2412 [2021-04-15 05:11:22,325 INFO L226 Difference]: Without dead ends: 2412 [2021-04-15 05:11:22,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:11:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-04-15 05:11:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-04-15 05:11:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-04-15 05:11:22,350 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-04-15 05:11:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:22,350 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-04-15 05:11:22,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-04-15 05:11:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:22,353 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:22,353 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:22,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-04-15 05:11:22,569 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-04-15 05:11:22,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:22,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145216944] [2021-04-15 05:11:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:22,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145216944] [2021-04-15 05:11:22,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382049035] [2021-04-15 05:11:22,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:22,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:22,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:22,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341746060] [2021-04-15 05:11:22,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:22,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:22,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:22,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:22,713 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:23,146 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-04-15 05:11:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:11:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:23,151 INFO L225 Difference]: With dead ends: 2335 [2021-04-15 05:11:23,151 INFO L226 Difference]: Without dead ends: 2335 [2021-04-15 05:11:23,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:11:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-04-15 05:11:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-04-15 05:11:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:11:23,171 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:11:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:23,171 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:11:23,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:11:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:23,173 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:23,173 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:23,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 05:11:23,389 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-04-15 05:11:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:23,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578231230] [2021-04-15 05:11:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:23,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578231230] [2021-04-15 05:11:23,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107274833] [2021-04-15 05:11:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:11:23,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:23,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:23,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:23,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:11:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888088408] [2021-04-15 05:11:23,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:23,517 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:23,925 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-04-15 05:11:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:11:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-04-15 05:11:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:23,931 INFO L225 Difference]: With dead ends: 2285 [2021-04-15 05:11:23,931 INFO L226 Difference]: Without dead ends: 2285 [2021-04-15 05:11:23,931 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:11:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-04-15 05:11:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-04-15 05:11:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 05:11:23,951 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 05:11:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:23,951 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 05:11:23,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 05:11:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:23,953 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:23,953 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:24,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 05:11:24,164 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-04-15 05:11:24,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:24,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352419184] [2021-04-15 05:11:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:24,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352419184] [2021-04-15 05:11:24,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615141103] [2021-04-15 05:11:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:11:24,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:11:24,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:24,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:24,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:11:24,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270894065] [2021-04-15 05:11:24,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:24,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:24,295 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:24,619 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-04-15 05:11:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:11:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-04-15 05:11:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:24,623 INFO L225 Difference]: With dead ends: 2176 [2021-04-15 05:11:24,623 INFO L226 Difference]: Without dead ends: 2172 [2021-04-15 05:11:24,623 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:11:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-04-15 05:11:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-04-15 05:11:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:11:24,642 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:11:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:24,642 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:11:24,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:11:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:24,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:24,644 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:24,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:24,849 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-04-15 05:11:24,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:24,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232878137] [2021-04-15 05:11:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:24,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232878137] [2021-04-15 05:11:24,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950119591] [2021-04-15 05:11:24,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:24,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:11:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:24,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:24,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:24,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:24,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211764537] [2021-04-15 05:11:24,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:24,974 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:25,357 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-04-15 05:11:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:11:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 05:11:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:25,361 INFO L225 Difference]: With dead ends: 2199 [2021-04-15 05:11:25,361 INFO L226 Difference]: Without dead ends: 2199 [2021-04-15 05:11:25,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:11:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-04-15 05:11:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-04-15 05:11:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 05:11:25,382 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 05:11:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:25,382 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 05:11:25,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 05:11:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:25,384 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:25,384 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:25,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:25,599 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:25,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-04-15 05:11:25,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:25,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487471255] [2021-04-15 05:11:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:25,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487471255] [2021-04-15 05:11:25,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125725388] [2021-04-15 05:11:25,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:25,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:11:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:25,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:25,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716377584] [2021-04-15 05:11:25,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:25,729 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:26,057 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-04-15 05:11:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:11:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 05:11:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:26,061 INFO L225 Difference]: With dead ends: 2156 [2021-04-15 05:11:26,061 INFO L226 Difference]: Without dead ends: 2152 [2021-04-15 05:11:26,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:11:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-04-15 05:11:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-04-15 05:11:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:11:26,085 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:11:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:26,085 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:11:26,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:11:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:26,087 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:26,088 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:26,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-04-15 05:11:26,301 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-04-15 05:11:26,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:26,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178718335] [2021-04-15 05:11:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178718335] [2021-04-15 05:11:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589646935] [2021-04-15 05:11:26,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:26,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:11:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:26,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:26,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:11:26,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925965116] [2021-04-15 05:11:26,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:11:26,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:26,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:11:26,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:11:26,445 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 05:11:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:26,754 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-04-15 05:11:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:11:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:26,758 INFO L225 Difference]: With dead ends: 2097 [2021-04-15 05:11:26,758 INFO L226 Difference]: Without dead ends: 2097 [2021-04-15 05:11:26,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:11:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-04-15 05:11:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-04-15 05:11:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-04-15 05:11:26,780 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-04-15 05:11:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:26,780 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-04-15 05:11:26,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 05:11:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-04-15 05:11:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:26,782 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:26,782 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:26,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:26,983 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-04-15 05:11:26,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:26,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551527212] [2021-04-15 05:11:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:27,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551527212] [2021-04-15 05:11:27,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069068617] [2021-04-15 05:11:27,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:27,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:27,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:11:27,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040585070] [2021-04-15 05:11:27,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:11:27,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:11:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:11:27,108 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 05:11:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:27,361 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-04-15 05:11:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:11:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:27,365 INFO L225 Difference]: With dead ends: 1963 [2021-04-15 05:11:27,365 INFO L226 Difference]: Without dead ends: 1959 [2021-04-15 05:11:27,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:11:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-04-15 05:11:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-04-15 05:11:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-04-15 05:11:27,383 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-04-15 05:11:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:27,384 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-04-15 05:11:27,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 05:11:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-04-15 05:11:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:27,386 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:27,386 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:27,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-04-15 05:11:27,602 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-04-15 05:11:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:27,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443827842] [2021-04-15 05:11:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:27,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443827842] [2021-04-15 05:11:27,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433266967] [2021-04-15 05:11:27,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:27,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:27,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:27,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:27,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:27,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:11:27,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047214474] [2021-04-15 05:11:27,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:11:27,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:11:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:11:27,703 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 05:11:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:27,904 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-04-15 05:11:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:11:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:11:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:27,907 INFO L225 Difference]: With dead ends: 1728 [2021-04-15 05:11:27,907 INFO L226 Difference]: Without dead ends: 1716 [2021-04-15 05:11:27,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:11:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-04-15 05:11:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-04-15 05:11:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-04-15 05:11:27,924 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-04-15 05:11:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:27,924 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-04-15 05:11:27,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 05:11:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-04-15 05:11:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:27,926 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:27,926 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:28,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:28,141 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-04-15 05:11:28,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:28,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960698349] [2021-04-15 05:11:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:28,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960698349] [2021-04-15 05:11:28,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614570366] [2021-04-15 05:11:28,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:28,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:11:28,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:28,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:28,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:28,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:28,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234650437] [2021-04-15 05:11:28,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:28,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:28,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:28,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:28,266 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:28,570 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-04-15 05:11:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:11:28,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 05:11:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:28,573 INFO L225 Difference]: With dead ends: 1821 [2021-04-15 05:11:28,573 INFO L226 Difference]: Without dead ends: 1821 [2021-04-15 05:11:28,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:11:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-04-15 05:11:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-04-15 05:11:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-04-15 05:11:28,608 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-04-15 05:11:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:28,608 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-04-15 05:11:28,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-04-15 05:11:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:28,610 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:28,610 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:28,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-04-15 05:11:28,825 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-04-15 05:11:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:28,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402895731] [2021-04-15 05:11:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:28,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402895731] [2021-04-15 05:11:28,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877027602] [2021-04-15 05:11:28,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:28,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:11:28,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:28,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:28,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:11:28,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237238919] [2021-04-15 05:11:28,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:11:28,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:28,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:11:28,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:11:28,947 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:29,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:29,206 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-04-15 05:11:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:11:29,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 05:11:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:29,209 INFO L225 Difference]: With dead ends: 1790 [2021-04-15 05:11:29,209 INFO L226 Difference]: Without dead ends: 1786 [2021-04-15 05:11:29,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:11:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-04-15 05:11:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-04-15 05:11:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-04-15 05:11:29,228 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-04-15 05:11:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:29,228 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-04-15 05:11:29,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 05:11:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-04-15 05:11:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:11:29,230 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:29,230 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:29,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-04-15 05:11:29,445 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:29,445 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-04-15 05:11:29,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:29,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768082721] [2021-04-15 05:11:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768082721] [2021-04-15 05:11:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243197590] [2021-04-15 05:11:29,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:29,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:11:29,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:29,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:11:29,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:29,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:29,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:11:29,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99494907] [2021-04-15 05:11:29,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:11:29,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:11:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:11:29,556 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:29,716 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-04-15 05:11:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:11:29,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-04-15 05:11:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:29,720 INFO L225 Difference]: With dead ends: 1649 [2021-04-15 05:11:29,720 INFO L226 Difference]: Without dead ends: 1637 [2021-04-15 05:11:29,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:11:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-04-15 05:11:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-04-15 05:11:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-04-15 05:11:29,737 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-04-15 05:11:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:29,737 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-04-15 05:11:29,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 05:11:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-04-15 05:11:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:29,739 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:29,739 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:29,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-15 05:11:29,940 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-04-15 05:11:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:29,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796642980] [2021-04-15 05:11:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:30,297 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-04-15 05:11:30,473 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-04-15 05:11:30,613 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-04-15 05:11:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:30,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796642980] [2021-04-15 05:11:30,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194870950] [2021-04-15 05:11:30,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:11:30,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:11:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:11:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:31,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:31,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:11:31,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:31,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:31,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:31,608 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-04-15 05:11:31,609 INFO L628 ElimStorePlain]: treesize reduction 114, result has 53.8 percent of original size [2021-04-15 05:11:31,609 INFO L518 ElimStorePlain]: Eliminatee A vanished before elimination [2021-04-15 05:11:31,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:11:31,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:31,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:31,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:11:31,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:31,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:31,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:31,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:31,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:11:31,725 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-04-15 05:11:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:31,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:31,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:11:31,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289400459] [2021-04-15 05:11:31,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:11:31,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:11:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:11:31,789 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:32,100 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-04-15 05:11:32,620 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-04-15 05:11:32,857 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-04-15 05:11:32,976 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-04-15 05:11:33,215 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2021-04-15 05:11:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:33,396 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-04-15 05:11:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:11:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:33,399 INFO L225 Difference]: With dead ends: 1517 [2021-04-15 05:11:33,399 INFO L226 Difference]: Without dead ends: 1502 [2021-04-15 05:11:33,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2313.0ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:11:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-04-15 05:11:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-04-15 05:11:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-04-15 05:11:33,417 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-04-15 05:11:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:33,417 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-04-15 05:11:33,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-04-15 05:11:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:33,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:33,419 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:33,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 05:11:33,633 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-04-15 05:11:33,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:33,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207730862] [2021-04-15 05:11:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:33,987 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-04-15 05:11:34,143 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-04-15 05:11:34,290 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-04-15 05:11:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207730862] [2021-04-15 05:11:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376821254] [2021-04-15 05:11:34,420 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 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 [2021-04-15 05:11:34,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:11:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:34,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:11:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:34,874 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 05:11:34,914 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_14, v_prenex_16]} [2021-04-15 05:11:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:34,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:11:34,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:35,036 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:11:35,037 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-04-15 05:11:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:35,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:35,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:11:35,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:35,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:35,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:35,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:35,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:35,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:35,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:35,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:35,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:35,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:11:35,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-04-15 05:11:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:35,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:35,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:11:35,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311452100] [2021-04-15 05:11:35,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:11:35,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:35,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:11:35,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:11:35,207 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:35,850 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-04-15 05:11:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:36,163 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-04-15 05:11:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:11:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:36,168 INFO L225 Difference]: With dead ends: 1495 [2021-04-15 05:11:36,168 INFO L226 Difference]: Without dead ends: 1480 [2021-04-15 05:11:36,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1638.7ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:11:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-04-15 05:11:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-04-15 05:11:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-04-15 05:11:36,186 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-04-15 05:11:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:36,186 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-04-15 05:11:36,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-04-15 05:11:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:36,188 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:36,188 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:36,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:36,404 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-04-15 05:11:36,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:36,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938167528] [2021-04-15 05:11:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:36,823 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-04-15 05:11:36,969 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-04-15 05:11:37,111 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-04-15 05:11:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938167528] [2021-04-15 05:11:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153282507] [2021-04-15 05:11:37,260 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 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 [2021-04-15 05:11:37,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:11:37,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:11:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:11:37,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:11:37,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:11:37,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:11:37,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:11:37,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:11:37,971 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:11:37,981 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:11:37,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:37,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:11:38,000 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:38,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:11:38,009 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:11:38,017 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:38,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:11:38,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:38,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:11:38,036 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:38,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:11:38,045 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:38,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:38,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:11:38,051 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:38,077 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-04-15 05:11:38,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:11:38,079 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:11:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:38,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:38,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:11:38,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140533428] [2021-04-15 05:11:38,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:11:38,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:11:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:11:38,113 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:39,440 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-04-15 05:11:40,108 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-04-15 05:11:40,589 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-04-15 05:11:40,729 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-04-15 05:11:40,854 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-04-15 05:11:41,012 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-04-15 05:11:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:41,022 INFO L93 Difference]: Finished difference Result 1660 states and 5351 transitions. [2021-04-15 05:11:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:11:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:41,026 INFO L225 Difference]: With dead ends: 1660 [2021-04-15 05:11:41,026 INFO L226 Difference]: Without dead ends: 1645 [2021-04-15 05:11:41,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3320.7ms TimeCoverageRelationStatistics Valid=391, Invalid=1961, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:11:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-04-15 05:11:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1180. [2021-04-15 05:11:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-04-15 05:11:41,044 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-04-15 05:11:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:41,044 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-04-15 05:11:41,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-04-15 05:11:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:41,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:41,046 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:41,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-15 05:11:41,247 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:41,248 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-04-15 05:11:41,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:41,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174287498] [2021-04-15 05:11:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:41,558 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2021-04-15 05:11:41,774 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-04-15 05:11:41,987 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-04-15 05:11:42,152 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-04-15 05:11:42,272 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-04-15 05:11:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:42,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174287498] [2021-04-15 05:11:42,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87834649] [2021-04-15 05:11:42,313 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 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 [2021-04-15 05:11:42,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:11:42,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:11:42,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:42,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:11:42,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:11:42,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,639 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:11:42,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:11:42,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,649 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:11:42,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,673 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:11:42,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:11:42,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:11:42,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:11:42,705 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:42,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:11:42,719 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,730 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:11:42,731 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,739 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:42,740 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:42,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:11:42,755 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,765 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:11:42,766 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:11:42,776 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,789 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:11:42,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:11:42,791 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:42,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:11:42,807 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:42,815 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:11:42,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:42,816 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:42,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:42,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:11:42,891 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:11:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:43,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:43,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:11:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643395201] [2021-04-15 05:11:43,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:11:43,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:11:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:11:43,093 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:43,674 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-04-15 05:11:43,872 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-04-15 05:11:44,019 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-04-15 05:11:44,170 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-04-15 05:11:44,303 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-04-15 05:11:44,724 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-04-15 05:11:44,933 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-04-15 05:11:45,091 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-04-15 05:11:45,293 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2021-04-15 05:11:45,469 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-04-15 05:11:46,041 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-04-15 05:11:46,320 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-04-15 05:11:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:46,443 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-04-15 05:11:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:11:46,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:46,447 INFO L225 Difference]: With dead ends: 1843 [2021-04-15 05:11:46,448 INFO L226 Difference]: Without dead ends: 1828 [2021-04-15 05:11:46,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3808.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:11:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-04-15 05:11:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-04-15 05:11:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-04-15 05:11:46,469 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-04-15 05:11:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:46,469 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-04-15 05:11:46,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-04-15 05:11:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:46,472 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:46,472 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:46,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:46,673 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-04-15 05:11:46,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:46,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520239341] [2021-04-15 05:11:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:46,932 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-04-15 05:11:47,188 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-04-15 05:11:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:47,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520239341] [2021-04-15 05:11:47,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756095638] [2021-04-15 05:11:47,419 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 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 [2021-04-15 05:11:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:11:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:48,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-04-15 05:11:48,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:11:48,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-04-15 05:11:48,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:11:48,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-04-15 05:11:48,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-04-15 05:11:48,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:11:48,087 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-04-15 05:11:48,095 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-04-15 05:11:48,103 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-04-15 05:11:48,112 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-04-15 05:11:48,120 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:11:48,128 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-04-15 05:11:48,137 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:11:48,145 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-04-15 05:11:48,155 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:48,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:11:48,161 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:48,200 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-04-15 05:11:48,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:11:48,202 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:809, output treesize:21 [2021-04-15 05:11:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:48,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:48,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:11:48,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671255624] [2021-04-15 05:11:48,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:11:48,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:48,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:11:48,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:11:48,237 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:49,441 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2021-04-15 05:11:50,150 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-04-15 05:11:50,681 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-04-15 05:11:51,110 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-04-15 05:11:51,260 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-04-15 05:11:51,391 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-04-15 05:11:51,552 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-04-15 05:11:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:51,563 INFO L93 Difference]: Finished difference Result 1879 states and 5994 transitions. [2021-04-15 05:11:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:11:51,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:51,567 INFO L225 Difference]: With dead ends: 1879 [2021-04-15 05:11:51,567 INFO L226 Difference]: Without dead ends: 1864 [2021-04-15 05:11:51,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 3557.0ms TimeCoverageRelationStatistics Valid=468, Invalid=2082, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:11:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-04-15 05:11:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1206. [2021-04-15 05:11:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-04-15 05:11:51,585 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-04-15 05:11:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:51,585 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-04-15 05:11:51,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-04-15 05:11:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:51,587 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:51,587 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:51,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-04-15 05:11:51,788 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-04-15 05:11:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:51,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252599360] [2021-04-15 05:11:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:52,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252599360] [2021-04-15 05:11:52,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270527950] [2021-04-15 05:11:52,351 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 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 [2021-04-15 05:11:52,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:11:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,019 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:11:53,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-04-15 05:11:53,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,053 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:11:53,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-04-15 05:11:53,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,095 INFO L354 Elim1Store]: treesize reduction 11, result has 62.1 percent of original size [2021-04-15 05:11:53,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 36 [2021-04-15 05:11:53,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-04-15 05:11:53,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,174 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:11:53,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 28 [2021-04-15 05:11:53,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,207 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:11:53,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-04-15 05:11:53,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,228 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:11:53,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-04-15 05:11:53,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,249 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:11:53,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-04-15 05:11:53,250 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,280 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:11:53,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-04-15 05:11:53,285 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,312 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:11:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 26 [2021-04-15 05:11:53,315 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,334 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:11:53,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-04-15 05:11:53,335 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,364 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:11:53,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-04-15 05:11:53,369 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,386 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:11:53,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:11:53,387 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,406 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:11:53,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:11:53,407 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,424 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:11:53,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-04-15 05:11:53,424 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:53,435 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:11:53,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:11:53,436 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:53,589 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 05:11:53,590 INFO L628 ElimStorePlain]: treesize reduction 172, result has 48.0 percent of original size [2021-04-15 05:11:53,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:11:53,592 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-04-15 05:11:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:53,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:53,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-04-15 05:11:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5111607] [2021-04-15 05:11:53,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:11:53,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:11:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:11:53,768 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:55,357 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-04-15 05:11:55,509 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-04-15 05:11:55,948 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2021-04-15 05:11:56,100 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-04-15 05:11:56,420 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-04-15 05:11:56,842 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-04-15 05:11:56,982 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-04-15 05:11:57,135 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-04-15 05:11:57,526 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-04-15 05:11:57,851 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-04-15 05:11:58,068 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-04-15 05:11:58,321 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-04-15 05:11:58,532 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-04-15 05:11:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:58,782 INFO L93 Difference]: Finished difference Result 2467 states and 7615 transitions. [2021-04-15 05:11:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:11:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:58,787 INFO L225 Difference]: With dead ends: 2467 [2021-04-15 05:11:58,787 INFO L226 Difference]: Without dead ends: 2422 [2021-04-15 05:11:58,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 5124.3ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 05:11:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-04-15 05:11:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1381. [2021-04-15 05:11:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-04-15 05:11:58,811 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-04-15 05:11:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:58,811 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-04-15 05:11:58,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-04-15 05:11:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:58,814 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:58,814 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:59,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-04-15 05:11:59,017 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-04-15 05:11:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:59,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96568551] [2021-04-15 05:11:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:59,240 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-04-15 05:11:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:59,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96568551] [2021-04-15 05:11:59,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090327624] [2021-04-15 05:11:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:59,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:11:59,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:00,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:00,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:00,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:00,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:00,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:00,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:12:00,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:00,433 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-04-15 05:12:00,433 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-04-15 05:12:00,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:00,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:00,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:00,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:00,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:00,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:00,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:00,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:00,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:00,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:00,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:00,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:00,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:00,541 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-04-15 05:12:00,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:12:00,543 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-04-15 05:12:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:00,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:00,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:12:00,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154546612] [2021-04-15 05:12:00,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:12:00,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:00,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:12:00,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:12:00,597 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:01,497 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-04-15 05:12:01,693 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-04-15 05:12:01,983 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2021-04-15 05:12:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:02,115 INFO L93 Difference]: Finished difference Result 1801 states and 5845 transitions. [2021-04-15 05:12:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:12:02,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:02,119 INFO L225 Difference]: With dead ends: 1801 [2021-04-15 05:12:02,119 INFO L226 Difference]: Without dead ends: 1786 [2021-04-15 05:12:02,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2116.3ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:12:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-04-15 05:12:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1398. [2021-04-15 05:12:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3149606299212597) internal successors, (4631), 1397 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4631 transitions. [2021-04-15 05:12:02,138 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4631 transitions. Word has length 26 [2021-04-15 05:12:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:02,138 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4631 transitions. [2021-04-15 05:12:02,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4631 transitions. [2021-04-15 05:12:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:02,140 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:02,140 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:02,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:02,356 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:02,356 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-04-15 05:12:02,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:02,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242789418] [2021-04-15 05:12:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:02,541 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-04-15 05:12:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:02,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242789418] [2021-04-15 05:12:02,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670687394] [2021-04-15 05:12:02,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:02,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:12:02,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:12:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:03,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,212 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:12:03,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,238 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:12:03,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 30 [2021-04-15 05:12:03,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,259 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:03,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,289 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:12:03,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 27 [2021-04-15 05:12:03,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,311 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:12:03,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,325 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:03,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,338 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-04-15 05:12:03,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,351 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:03,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,365 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:12:03,366 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,387 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:12:03,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-04-15 05:12:03,389 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:03,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-04-15 05:12:03,413 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:03,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-04-15 05:12:03,435 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,461 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:12:03,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-04-15 05:12:03,463 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,485 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:12:03,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-04-15 05:12:03,487 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:03,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:12:03,512 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:03,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,521 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:12:03,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:03,522 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,626 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:12:03,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:03,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:12:03,629 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:777, output treesize:249 [2021-04-15 05:12:03,755 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:12:03,966 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-04-15 05:12:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:04,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:04,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:12:04,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443302698] [2021-04-15 05:12:04,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:12:04,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:04,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:12:04,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:12:04,079 INFO L87 Difference]: Start difference. First operand 1398 states and 4631 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:04,750 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-04-15 05:12:05,200 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-04-15 05:12:05,398 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2021-04-15 05:12:05,655 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-04-15 05:12:05,809 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-04-15 05:12:06,133 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-04-15 05:12:06,308 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-04-15 05:12:06,531 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-04-15 05:12:06,659 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:12:06,962 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-04-15 05:12:07,272 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-04-15 05:12:07,724 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-04-15 05:12:08,035 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2021-04-15 05:12:08,586 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-04-15 05:12:09,019 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2021-04-15 05:12:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:09,118 INFO L93 Difference]: Finished difference Result 2032 states and 6448 transitions. [2021-04-15 05:12:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:12:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:09,122 INFO L225 Difference]: With dead ends: 2032 [2021-04-15 05:12:09,123 INFO L226 Difference]: Without dead ends: 2017 [2021-04-15 05:12:09,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 5102.3ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:12:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-04-15 05:12:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1420. [2021-04-15 05:12:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.320648343904158) internal successors, (4712), 1419 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 4712 transitions. [2021-04-15 05:12:09,146 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 4712 transitions. Word has length 26 [2021-04-15 05:12:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:09,146 INFO L480 AbstractCegarLoop]: Abstraction has 1420 states and 4712 transitions. [2021-04-15 05:12:09,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 4712 transitions. [2021-04-15 05:12:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:09,149 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:09,149 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:09,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-04-15 05:12:09,350 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:09,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-04-15 05:12:09,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:09,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153510362] [2021-04-15 05:12:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:09,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153510362] [2021-04-15 05:12:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280318174] [2021-04-15 05:12:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:09,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:12:09,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:09,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:12:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:10,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:10,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:10,642 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-04-15 05:12:10,642 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-04-15 05:12:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:10,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:10,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:10,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:10,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:10,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:10,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:10,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:10,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:10,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:10,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:10,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:10,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:10,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:10,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:10,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:10,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:12:10,821 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-04-15 05:12:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:10,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:10,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:12:10,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899387543] [2021-04-15 05:12:10,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:12:10,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:12:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:12:10,876 INFO L87 Difference]: Start difference. First operand 1420 states and 4712 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:11,598 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-04-15 05:12:12,010 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-04-15 05:12:12,205 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2021-04-15 05:12:12,566 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-04-15 05:12:12,887 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-04-15 05:12:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:12,949 INFO L93 Difference]: Finished difference Result 1935 states and 6256 transitions. [2021-04-15 05:12:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:12:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:12,952 INFO L225 Difference]: With dead ends: 1935 [2021-04-15 05:12:12,952 INFO L226 Difference]: Without dead ends: 1920 [2021-04-15 05:12:12,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2510.5ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:12:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-04-15 05:12:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1429. [2021-04-15 05:12:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.3249299719887957) internal successors, (4748), 1428 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4748 transitions. [2021-04-15 05:12:12,973 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4748 transitions. Word has length 26 [2021-04-15 05:12:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:12,973 INFO L480 AbstractCegarLoop]: Abstraction has 1429 states and 4748 transitions. [2021-04-15 05:12:12,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4748 transitions. [2021-04-15 05:12:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:12,975 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:12,975 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:13,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:13,176 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-04-15 05:12:13,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:13,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764177275] [2021-04-15 05:12:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:13,432 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-04-15 05:12:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764177275] [2021-04-15 05:12:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668464654] [2021-04-15 05:12:13,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:13,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:12:13,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:13,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:12:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:14,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:14,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:12:14,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:14,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:12:14,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:12:14,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:14,154 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:14,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:14,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:14,178 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:14,184 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:12:14,190 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:14,196 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:14,203 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:14,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:14,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:12:14,207 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:14,283 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:12:14,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:12:14,285 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:12:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:14,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:14,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:12:14,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762100677] [2021-04-15 05:12:14,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:12:14,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:14,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:12:14,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:12:14,348 INFO L87 Difference]: Start difference. First operand 1429 states and 4748 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:15,130 INFO L93 Difference]: Finished difference Result 1734 states and 5693 transitions. [2021-04-15 05:12:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:12:15,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:15,134 INFO L225 Difference]: With dead ends: 1734 [2021-04-15 05:12:15,134 INFO L226 Difference]: Without dead ends: 1719 [2021-04-15 05:12:15,134 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1186.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:12:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-04-15 05:12:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1438. [2021-04-15 05:12:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-04-15 05:12:15,154 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-04-15 05:12:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:15,154 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-04-15 05:12:15,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-04-15 05:12:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:15,156 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:15,156 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:15,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:15,357 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-04-15 05:12:15,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:15,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380538341] [2021-04-15 05:12:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:15,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380538341] [2021-04-15 05:12:15,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359399533] [2021-04-15 05:12:15,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:15,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:12:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:12:15,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,119 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:16,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:12:16,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:16,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:16,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,148 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:16,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:16,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:16,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:16,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:12:16,186 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:16,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:12:16,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:16,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:16,219 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,228 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:12:16,229 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:16,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:12:16,244 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,254 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:16,255 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:12:16,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,277 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:16,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:16,279 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:16,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:16,292 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:12:16,303 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:16,309 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:16,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:12:16,310 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:16,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:16,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:12:16,402 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-04-15 05:12:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:16,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:16,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:12:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311745244] [2021-04-15 05:12:16,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:12:16,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:12:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:12:16,617 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:17,369 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-04-15 05:12:17,615 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-04-15 05:12:17,873 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-04-15 05:12:18,110 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-04-15 05:12:18,244 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-04-15 05:12:18,477 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-04-15 05:12:18,662 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-04-15 05:12:18,877 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-04-15 05:12:19,160 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-04-15 05:12:19,563 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-04-15 05:12:19,688 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 05:12:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:19,835 INFO L93 Difference]: Finished difference Result 2377 states and 7644 transitions. [2021-04-15 05:12:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:12:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:19,839 INFO L225 Difference]: With dead ends: 2377 [2021-04-15 05:12:19,839 INFO L226 Difference]: Without dead ends: 2347 [2021-04-15 05:12:19,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3214.7ms TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:12:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-04-15 05:12:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1438. [2021-04-15 05:12:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-04-15 05:12:19,861 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-04-15 05:12:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:19,862 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-04-15 05:12:19,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-04-15 05:12:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:19,864 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:19,864 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:20,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:20,077 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-04-15 05:12:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:20,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524416882] [2021-04-15 05:12:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:20,377 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-04-15 05:12:20,530 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-04-15 05:12:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:20,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524416882] [2021-04-15 05:12:20,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918608378] [2021-04-15 05:12:20,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:20,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:12:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:12:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:20,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:12:20,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:20,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:20,981 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:20,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:12:20,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:20,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:20,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:12:20,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:21,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:12:21,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,021 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:21,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:21,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:12:21,041 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,052 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:21,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:12:21,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:21,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:12:21,068 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,079 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:21,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:21,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,090 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:21,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:21,091 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:21,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:21,107 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,116 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:21,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:21,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,126 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:21,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:12:21,127 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,139 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:21,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:21,140 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:21,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:21,153 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:21,161 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:21,162 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:21,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:21,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:12:21,240 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:12:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:21,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:21,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:12:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516623318] [2021-04-15 05:12:21,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:12:21,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:12:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:12:21,443 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:22,114 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-04-15 05:12:22,239 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-04-15 05:12:22,513 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-04-15 05:12:22,661 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-04-15 05:12:22,786 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-04-15 05:12:22,982 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-04-15 05:12:23,338 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-04-15 05:12:23,521 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-04-15 05:12:23,715 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-04-15 05:12:24,021 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-04-15 05:12:24,262 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-04-15 05:12:24,560 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 32 [2021-04-15 05:12:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:24,671 INFO L93 Difference]: Finished difference Result 2013 states and 6563 transitions. [2021-04-15 05:12:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:12:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:24,675 INFO L225 Difference]: With dead ends: 2013 [2021-04-15 05:12:24,675 INFO L226 Difference]: Without dead ends: 1998 [2021-04-15 05:12:24,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 3482.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:12:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-04-15 05:12:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1438. [2021-04-15 05:12:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-04-15 05:12:24,698 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-04-15 05:12:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:24,698 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-04-15 05:12:24,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-04-15 05:12:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:24,700 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:24,700 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:24,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:24,901 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:24,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-04-15 05:12:24,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:24,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582090770] [2021-04-15 05:12:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:25,230 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-04-15 05:12:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:25,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582090770] [2021-04-15 05:12:25,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361684615] [2021-04-15 05:12:25,465 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 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 [2021-04-15 05:12:25,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:12:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:12:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:26,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:26,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:12:26,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:12:26,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:12:26,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:12:26,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:12:26,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:26,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:12:26,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:12:26,216 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:12:26,226 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:12:26,236 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:12:26,246 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:12:26,256 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:12:26,264 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:26,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:12:26,270 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,298 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-04-15 05:12:26,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:12:26,299 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:12:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:26,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:26,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:12:26,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172371411] [2021-04-15 05:12:26,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:12:26,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:12:26,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:12:26,328 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:26,783 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-04-15 05:12:27,350 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-04-15 05:12:27,623 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-04-15 05:12:27,961 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-04-15 05:12:28,286 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-04-15 05:12:28,445 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-04-15 05:12:28,935 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-04-15 05:12:29,517 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-04-15 05:12:29,914 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-04-15 05:12:30,064 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-04-15 05:12:30,304 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-04-15 05:12:30,669 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-04-15 05:12:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:31,103 INFO L93 Difference]: Finished difference Result 3246 states and 10037 transitions. [2021-04-15 05:12:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:12:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:31,109 INFO L225 Difference]: With dead ends: 3246 [2021-04-15 05:12:31,109 INFO L226 Difference]: Without dead ends: 3201 [2021-04-15 05:12:31,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4694.6ms TimeCoverageRelationStatistics Valid=659, Invalid=3247, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:12:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-04-15 05:12:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 1453. [2021-04-15 05:12:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.34297520661157) internal successors, (4854), 1452 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4854 transitions. [2021-04-15 05:12:31,136 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4854 transitions. Word has length 26 [2021-04-15 05:12:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:31,136 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4854 transitions. [2021-04-15 05:12:31,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4854 transitions. [2021-04-15 05:12:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:31,138 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:31,138 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:31,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:31,339 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:31,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:31,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-04-15 05:12:31,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:31,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246721367] [2021-04-15 05:12:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:31,631 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-04-15 05:12:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:31,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246721367] [2021-04-15 05:12:31,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774727581] [2021-04-15 05:12:31,852 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 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 [2021-04-15 05:12:31,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:12:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:12:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:32,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:32,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:12:32,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:12:32,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:12:32,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:12:32,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:12:32,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:12:32,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:12:32,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:12:32,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:12:32,569 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:32,579 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:12:32,590 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:12:32,600 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:12:32,610 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:32,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:32,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:12:32,617 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:32,651 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-04-15 05:12:32,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:12:32,652 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:12:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:32,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:32,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:12:32,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868781734] [2021-04-15 05:12:32,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:12:32,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:12:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:12:32,681 INFO L87 Difference]: Start difference. First operand 1453 states and 4854 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:33,254 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-04-15 05:12:33,396 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2021-04-15 05:12:33,911 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2021-04-15 05:12:34,213 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-04-15 05:12:34,574 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-04-15 05:12:35,013 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-04-15 05:12:35,471 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-04-15 05:12:35,804 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-04-15 05:12:36,282 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-04-15 05:12:36,604 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-04-15 05:12:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:36,841 INFO L93 Difference]: Finished difference Result 3018 states and 9515 transitions. [2021-04-15 05:12:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:12:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:36,848 INFO L225 Difference]: With dead ends: 3018 [2021-04-15 05:12:36,848 INFO L226 Difference]: Without dead ends: 2973 [2021-04-15 05:12:36,848 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 4203.2ms TimeCoverageRelationStatistics Valid=591, Invalid=2601, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:12:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-04-15 05:12:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1456. [2021-04-15 05:12:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.3450171821305843) internal successors, (4867), 1455 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4867 transitions. [2021-04-15 05:12:36,875 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4867 transitions. Word has length 26 [2021-04-15 05:12:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:36,875 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 4867 transitions. [2021-04-15 05:12:36,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4867 transitions. [2021-04-15 05:12:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:36,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:36,878 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:37,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:37,078 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-04-15 05:12:37,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:37,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127872640] [2021-04-15 05:12:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:37,480 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-04-15 05:12:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:37,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127872640] [2021-04-15 05:12:37,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232388744] [2021-04-15 05:12:37,742 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 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 [2021-04-15 05:12:37,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:12:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:12:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:38,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-04-15 05:12:38,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,361 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:12:38,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-04-15 05:12:38,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,400 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:12:38,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-04-15 05:12:38,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,432 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:12:38,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-04-15 05:12:38,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,462 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 05:12:38,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-04-15 05:12:38,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,495 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:12:38,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-04-15 05:12:38,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,524 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 05:12:38,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-04-15 05:12:38,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,553 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:12:38,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-04-15 05:12:38,555 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,573 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:12:38,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-04-15 05:12:38,573 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,590 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:12:38,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:12:38,591 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,618 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-04-15 05:12:38,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-04-15 05:12:38,620 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,641 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:12:38,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:12:38,642 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,678 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-04-15 05:12:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-04-15 05:12:38,681 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,707 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-04-15 05:12:38,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-04-15 05:12:38,709 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,725 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:12:38,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-04-15 05:12:38,726 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,736 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:12:38,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:12:38,736 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,859 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-04-15 05:12:38,860 INFO L628 ElimStorePlain]: treesize reduction 171, result has 38.7 percent of original size [2021-04-15 05:12:38,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:12:38,862 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-04-15 05:12:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:38,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:38,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:12:38,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458902383] [2021-04-15 05:12:38,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:12:38,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:38,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:12:38,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:12:38,973 INFO L87 Difference]: Start difference. First operand 1456 states and 4867 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:39,329 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-04-15 05:12:39,699 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-04-15 05:12:39,849 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2021-04-15 05:12:40,050 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-04-15 05:12:40,196 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-04-15 05:12:40,417 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2021-04-15 05:12:40,566 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-04-15 05:12:40,875 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-04-15 05:12:41,377 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-04-15 05:12:41,583 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-04-15 05:12:41,724 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-04-15 05:12:41,936 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-04-15 05:12:42,223 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-04-15 05:12:42,353 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 05:12:42,571 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2021-04-15 05:12:43,195 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-04-15 05:12:43,736 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-04-15 05:12:44,041 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-04-15 05:12:44,196 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-04-15 05:12:44,510 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2021-04-15 05:12:44,779 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2021-04-15 05:12:44,965 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 05:12:45,162 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-04-15 05:12:45,351 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-04-15 05:12:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:45,548 INFO L93 Difference]: Finished difference Result 3484 states and 10843 transitions. [2021-04-15 05:12:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 05:12:45,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:45,556 INFO L225 Difference]: With dead ends: 3484 [2021-04-15 05:12:45,556 INFO L226 Difference]: Without dead ends: 3424 [2021-04-15 05:12:45,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 6309.5ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 05:12:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-04-15 05:12:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1469. [2021-04-15 05:12:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.356267029972752) internal successors, (4927), 1468 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 4927 transitions. [2021-04-15 05:12:45,584 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 4927 transitions. Word has length 26 [2021-04-15 05:12:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:45,584 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 4927 transitions. [2021-04-15 05:12:45,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 4927 transitions. [2021-04-15 05:12:45,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:45,587 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:45,587 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:45,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-04-15 05:12:45,787 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:45,788 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 13 times [2021-04-15 05:12:45,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:45,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605648581] [2021-04-15 05:12:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:46,007 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-04-15 05:12:46,261 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 05:12:46,405 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-04-15 05:12:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:46,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605648581] [2021-04-15 05:12:46,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556361290] [2021-04-15 05:12:46,534 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 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 [2021-04-15 05:12:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:12:46,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:47,049 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-04-15 05:12:47,104 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_38], 3=[v_prenex_40, v_prenex_36]} [2021-04-15 05:12:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:47,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:47,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:47,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:47,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:47,279 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-04-15 05:12:47,280 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-04-15 05:12:47,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:47,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:47,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:47,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:47,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:47,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:47,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:47,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:47,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:47,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:47,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:47,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:47,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:47,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 05:12:47,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:47,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:47,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:12:47,443 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:61 [2021-04-15 05:12:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:47,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:47,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:12:47,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425402932] [2021-04-15 05:12:47,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:12:47,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:12:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:12:47,506 INFO L87 Difference]: Start difference. First operand 1469 states and 4927 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:48,494 INFO L93 Difference]: Finished difference Result 1822 states and 6002 transitions. [2021-04-15 05:12:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:12:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:48,498 INFO L225 Difference]: With dead ends: 1822 [2021-04-15 05:12:48,498 INFO L226 Difference]: Without dead ends: 1807 [2021-04-15 05:12:48,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1731.3ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:12:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-04-15 05:12:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1461. [2021-04-15 05:12:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.3602739726027395) internal successors, (4906), 1460 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4906 transitions. [2021-04-15 05:12:48,519 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4906 transitions. Word has length 26 [2021-04-15 05:12:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:48,519 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 4906 transitions. [2021-04-15 05:12:48,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4906 transitions. [2021-04-15 05:12:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:48,522 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:48,522 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:48,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-04-15 05:12:48,723 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:48,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 14 times [2021-04-15 05:12:48,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:48,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371786009] [2021-04-15 05:12:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:49,029 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-04-15 05:12:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:49,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371786009] [2021-04-15 05:12:49,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665125949] [2021-04-15 05:12:49,239 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 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 [2021-04-15 05:12:49,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:12:49,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:12:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:49,880 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-04-15 05:12:49,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:12:49,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:49,912 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:12:49,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-04-15 05:12:49,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:50,103 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 05:12:50,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:50,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:50,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-04-15 05:12:50,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:50,163 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:12:50,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-04-15 05:12:50,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:50,534 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-04-15 05:12:50,534 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.8 percent of original size [2021-04-15 05:12:50,565 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:12:50,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-04-15 05:12:50,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:50,593 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:12:50,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-04-15 05:12:50,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:50,781 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-04-15 05:12:50,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:50,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-04-15 05:12:50,812 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:50,837 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:12:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-04-15 05:12:50,841 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:51,002 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-04-15 05:12:51,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:51,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:12:51,043 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:857 [2021-04-15 05:12:51,682 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2021-04-15 05:12:52,078 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-04-15 05:12:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:52,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:52,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 05:12:52,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991685997] [2021-04-15 05:12:52,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:12:52,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:52,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:12:52,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:12:52,226 INFO L87 Difference]: Start difference. First operand 1461 states and 4906 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:52,441 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 22 [2021-04-15 05:12:52,617 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-04-15 05:12:53,060 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2021-04-15 05:12:53,681 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 48 [2021-04-15 05:12:53,964 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-04-15 05:12:54,583 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2021-04-15 05:12:54,975 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 49 [2021-04-15 05:12:55,470 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 56 [2021-04-15 05:12:56,076 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 75 [2021-04-15 05:12:56,542 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 58 [2021-04-15 05:12:56,879 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-04-15 05:12:57,288 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-04-15 05:12:57,715 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-04-15 05:12:58,362 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 75 [2021-04-15 05:12:59,031 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2021-04-15 05:12:59,459 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 57 [2021-04-15 05:12:59,973 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2021-04-15 05:13:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:00,077 INFO L93 Difference]: Finished difference Result 2104 states and 6764 transitions. [2021-04-15 05:13:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:13:00,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:00,081 INFO L225 Difference]: With dead ends: 2104 [2021-04-15 05:13:00,081 INFO L226 Difference]: Without dead ends: 2089 [2021-04-15 05:13:00,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 8634.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:13:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-04-15 05:13:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1465. [2021-04-15 05:13:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.365437158469945) internal successors, (4927), 1464 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4927 transitions. [2021-04-15 05:13:00,103 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4927 transitions. Word has length 26 [2021-04-15 05:13:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:00,103 INFO L480 AbstractCegarLoop]: Abstraction has 1465 states and 4927 transitions. [2021-04-15 05:13:00,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4927 transitions. [2021-04-15 05:13:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:00,106 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:00,106 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:00,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:00,322 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:00,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 15 times [2021-04-15 05:13:00,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:00,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122970212] [2021-04-15 05:13:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:00,548 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-04-15 05:13:00,684 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-04-15 05:13:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:00,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122970212] [2021-04-15 05:13:00,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485783911] [2021-04-15 05:13:00,907 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 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 [2021-04-15 05:13:00,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:13:00,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:13:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,384 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:01,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:01,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-04-15 05:13:01,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,415 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:01,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,432 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:01,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,447 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:01,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:01,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-04-15 05:13:01,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:01,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-04-15 05:13:01,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:01,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-04-15 05:13:01,520 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,539 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:01,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-04-15 05:13:01,541 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:01,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-04-15 05:13:01,559 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,572 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:01,573 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:01,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-04-15 05:13:01,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,605 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:01,606 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-04-15 05:13:01,619 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,633 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:01,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:01,634 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:01,656 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:01,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-04-15 05:13:01,657 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:01,766 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:13:01,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:01,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:01,772 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:825, output treesize:196 [2021-04-15 05:13:01,957 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-04-15 05:13:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:02,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:02,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:13:02,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576163298] [2021-04-15 05:13:02,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:13:02,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:13:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:13:02,072 INFO L87 Difference]: Start difference. First operand 1465 states and 4927 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:02,596 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-04-15 05:13:02,731 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-04-15 05:13:02,969 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-04-15 05:13:03,283 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-04-15 05:13:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:03,314 INFO L93 Difference]: Finished difference Result 2031 states and 6671 transitions. [2021-04-15 05:13:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:13:03,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:03,318 INFO L225 Difference]: With dead ends: 2031 [2021-04-15 05:13:03,318 INFO L226 Difference]: Without dead ends: 2016 [2021-04-15 05:13:03,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1875.8ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:13:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-04-15 05:13:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1462. [2021-04-15 05:13:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.36208076659822) internal successors, (4912), 1461 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4912 transitions. [2021-04-15 05:13:03,339 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4912 transitions. Word has length 26 [2021-04-15 05:13:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:03,339 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 4912 transitions. [2021-04-15 05:13:03,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4912 transitions. [2021-04-15 05:13:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:03,342 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:03,342 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:03,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-04-15 05:13:03,542 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:03,543 INFO L82 PathProgramCache]: Analyzing trace with hash 576217266, now seen corresponding path program 16 times [2021-04-15 05:13:03,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:03,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244502119] [2021-04-15 05:13:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:03,921 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-04-15 05:13:04,041 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 05:13:04,157 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 05:13:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:04,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244502119] [2021-04-15 05:13:04,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854895580] [2021-04-15 05:13:04,187 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 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 [2021-04-15 05:13:04,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:04,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:13:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:04,570 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:13:04,815 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-04-15 05:13:04,878 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_55], 2=[A, v_prenex_56]} [2021-04-15 05:13:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:04,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:13:04,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:05,012 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:13:05,013 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-04-15 05:13:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:05,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:05,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:05,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:05,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:05,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:05,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:05,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:05,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:05,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:13:05,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:05,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:05,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:13:05,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-04-15 05:13:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:05,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:05,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:13:05,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212279318] [2021-04-15 05:13:05,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:13:05,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:13:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:05,199 INFO L87 Difference]: Start difference. First operand 1462 states and 4912 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:05,959 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-04-15 05:13:06,350 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-04-15 05:13:06,583 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-04-15 05:13:06,784 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:13:07,226 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-04-15 05:13:07,557 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-04-15 05:13:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:07,857 INFO L93 Difference]: Finished difference Result 2123 states and 6934 transitions. [2021-04-15 05:13:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:13:07,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:07,861 INFO L225 Difference]: With dead ends: 2123 [2021-04-15 05:13:07,862 INFO L226 Difference]: Without dead ends: 2108 [2021-04-15 05:13:07,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 3120.3ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:13:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-04-15 05:13:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1465. [2021-04-15 05:13:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3633879781420766) internal successors, (4924), 1464 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4924 transitions. [2021-04-15 05:13:07,895 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4924 transitions. Word has length 26 [2021-04-15 05:13:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:07,895 INFO L480 AbstractCegarLoop]: Abstraction has 1465 states and 4924 transitions. [2021-04-15 05:13:07,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4924 transitions. [2021-04-15 05:13:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:07,898 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:07,898 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:08,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1079,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:08,107 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:08,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1041315514, now seen corresponding path program 17 times [2021-04-15 05:13:08,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:08,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082256006] [2021-04-15 05:13:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:08,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082256006] [2021-04-15 05:13:08,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467260158] [2021-04-15 05:13:08,594 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 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 [2021-04-15 05:13:08,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:13:08,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:08,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:08,996 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:13:09,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:13:09,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,193 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-04-15 05:13:09,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,208 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:09,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:13:09,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,342 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-04-15 05:13:09,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:13:09,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,475 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-04-15 05:13:09,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,489 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:13:09,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,605 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-04-15 05:13:09,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,619 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:09,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:13:09,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,731 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-04-15 05:13:09,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:13:09,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,858 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-04-15 05:13:09,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:13:09,874 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,980 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:13:09,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:09,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:13:09,994 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:10,097 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 05:13:10,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:10,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:10,104 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-04-15 05:13:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:10,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:10,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:13:10,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364996405] [2021-04-15 05:13:10,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:13:10,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:13:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:13:10,325 INFO L87 Difference]: Start difference. First operand 1465 states and 4924 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:10,810 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2021-04-15 05:13:10,968 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-04-15 05:13:11,365 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-04-15 05:13:11,567 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-04-15 05:13:11,800 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-04-15 05:13:12,055 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-04-15 05:13:12,248 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:13:12,679 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-04-15 05:13:13,241 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-04-15 05:13:13,585 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 05:13:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:13,728 INFO L93 Difference]: Finished difference Result 2065 states and 6709 transitions. [2021-04-15 05:13:13,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:13:13,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:13,732 INFO L225 Difference]: With dead ends: 2065 [2021-04-15 05:13:13,732 INFO L226 Difference]: Without dead ends: 2035 [2021-04-15 05:13:13,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 3676.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:13:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-04-15 05:13:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1459. [2021-04-15 05:13:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.3607681755829906) internal successors, (4900), 1458 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4900 transitions. [2021-04-15 05:13:13,754 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4900 transitions. Word has length 26 [2021-04-15 05:13:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:13,754 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4900 transitions. [2021-04-15 05:13:13,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4900 transitions. [2021-04-15 05:13:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:13,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:13,757 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:13,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-04-15 05:13:13,957 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 18 times [2021-04-15 05:13:13,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:13,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718400857] [2021-04-15 05:13:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:14,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718400857] [2021-04-15 05:13:14,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565329413] [2021-04-15 05:13:14,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:13:14,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:13:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:14,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:14,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:13:14,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:14,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:13:14,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:13:14,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:14,932 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:13:14,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:13:14,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:13:14,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:13:14,967 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:13:14,975 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:14,983 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:13:14,990 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:14,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:14,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:13:14,998 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:15,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:15,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:15,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:15,006 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:15,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:15,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:13:15,011 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:15,102 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:13:15,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:13:15,103 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:13:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:15,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:15,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:13:15,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128442889] [2021-04-15 05:13:15,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:13:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:15,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:13:15,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:13:15,169 INFO L87 Difference]: Start difference. First operand 1459 states and 4900 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:16,042 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 05:13:16,332 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-04-15 05:13:16,492 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-04-15 05:13:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:16,783 INFO L93 Difference]: Finished difference Result 1950 states and 6361 transitions. [2021-04-15 05:13:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:13:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:16,786 INFO L225 Difference]: With dead ends: 1950 [2021-04-15 05:13:16,787 INFO L226 Difference]: Without dead ends: 1925 [2021-04-15 05:13:16,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1866.6ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:13:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-04-15 05:13:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1494. [2021-04-15 05:13:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.3563295378432687) internal successors, (5011), 1493 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5011 transitions. [2021-04-15 05:13:16,808 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5011 transitions. Word has length 26 [2021-04-15 05:13:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:16,808 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 5011 transitions. [2021-04-15 05:13:16,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5011 transitions. [2021-04-15 05:13:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:16,810 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:16,810 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:17,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1104,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:17,026 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 19 times [2021-04-15 05:13:17,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:17,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720268027] [2021-04-15 05:13:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:17,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720268027] [2021-04-15 05:13:17,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213084617] [2021-04-15 05:13:17,443 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 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 [2021-04-15 05:13:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:13:17,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:17,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:17,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:13:17,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,799 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:17,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:13:17,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:17,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:13:17,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:13:17,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:17,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:13:17,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,855 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:17,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:13:17,867 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,877 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:13:17,878 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:17,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:13:17,895 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:17,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:13:17,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:13:17,922 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,935 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:17,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:13:17,937 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:13:17,948 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,958 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:13:17,959 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,968 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:17,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:17,969 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:17,979 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:17,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:13:17,980 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:18,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:18,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:18,090 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-04-15 05:13:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:18,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:18,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:13:18,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695255025] [2021-04-15 05:13:18,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:13:18,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:13:18,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:18,315 INFO L87 Difference]: Start difference. First operand 1494 states and 5011 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:19,737 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:13:19,869 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 05:13:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:19,948 INFO L93 Difference]: Finished difference Result 2167 states and 7052 transitions. [2021-04-15 05:13:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:19,952 INFO L225 Difference]: With dead ends: 2167 [2021-04-15 05:13:19,952 INFO L226 Difference]: Without dead ends: 2142 [2021-04-15 05:13:19,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1832.9ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:13:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-04-15 05:13:19,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1497. [2021-04-15 05:13:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.356951871657754) internal successors, (5022), 1496 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5022 transitions. [2021-04-15 05:13:19,974 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5022 transitions. Word has length 26 [2021-04-15 05:13:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:19,974 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 5022 transitions. [2021-04-15 05:13:19,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5022 transitions. [2021-04-15 05:13:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:19,977 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:19,977 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:20,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-04-15 05:13:20,178 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 20 times [2021-04-15 05:13:20,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:20,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190805159] [2021-04-15 05:13:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:20,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190805159] [2021-04-15 05:13:20,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695060510] [2021-04-15 05:13:20,649 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 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 [2021-04-15 05:13:20,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:20,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:13:20,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:13:21,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:13:21,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,262 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:13:21,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:21,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:13:21,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:13:21,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,431 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 05:13:21,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,446 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:21,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:13:21,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:13:21,462 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,600 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-04-15 05:13:21,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,615 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:13:21,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:13:21,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:21,748 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:13:21,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:21,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:21,754 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:174 [2021-04-15 05:13:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:21,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:21,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-04-15 05:13:21,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087803538] [2021-04-15 05:13:21,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:13:21,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:13:21,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:13:21,972 INFO L87 Difference]: Start difference. First operand 1497 states and 5022 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:22,822 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-04-15 05:13:23,171 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-04-15 05:13:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:23,242 INFO L93 Difference]: Finished difference Result 1676 states and 5533 transitions. [2021-04-15 05:13:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:13:23,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:23,245 INFO L225 Difference]: With dead ends: 1676 [2021-04-15 05:13:23,245 INFO L226 Difference]: Without dead ends: 1651 [2021-04-15 05:13:23,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1655.7ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:13:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-04-15 05:13:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1510. [2021-04-15 05:13:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.3631544068919816) internal successors, (5075), 1509 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5075 transitions. [2021-04-15 05:13:23,265 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5075 transitions. Word has length 26 [2021-04-15 05:13:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:23,265 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5075 transitions. [2021-04-15 05:13:23,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5075 transitions. [2021-04-15 05:13:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:23,267 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:23,267 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:23,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-04-15 05:13:23,473 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 21 times [2021-04-15 05:13:23,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:23,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410268171] [2021-04-15 05:13:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:23,706 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-04-15 05:13:23,825 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-04-15 05:13:24,003 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-04-15 05:13:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:24,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410268171] [2021-04-15 05:13:24,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698366264] [2021-04-15 05:13:24,193 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 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 [2021-04-15 05:13:24,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:13:24,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:13:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:24,661 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-04-15 05:13:24,883 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-04-15 05:13:24,963 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_85, v_prenex_84]} [2021-04-15 05:13:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:24,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:13:24,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:25,097 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:13:25,097 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-04-15 05:13:25,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:25,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:25,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:25,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:25,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:25,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:25,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:25,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:25,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:13:25,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:25,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:25,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:13:25,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-04-15 05:13:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:25,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:25,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:13:25,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275624091] [2021-04-15 05:13:25,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:13:25,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:25,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:13:25,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:25,292 INFO L87 Difference]: Start difference. First operand 1510 states and 5075 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:25,788 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:13:25,976 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-04-15 05:13:26,390 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-04-15 05:13:26,810 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-04-15 05:13:27,048 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 05:13:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:27,225 INFO L93 Difference]: Finished difference Result 2093 states and 6807 transitions. [2021-04-15 05:13:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:13:27,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:27,230 INFO L225 Difference]: With dead ends: 2093 [2021-04-15 05:13:27,230 INFO L226 Difference]: Without dead ends: 2048 [2021-04-15 05:13:27,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2726.2ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:13:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-04-15 05:13:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1554. [2021-04-15 05:13:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 3.3708950418544754) internal successors, (5235), 1553 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5235 transitions. [2021-04-15 05:13:27,252 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5235 transitions. Word has length 26 [2021-04-15 05:13:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:27,252 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 5235 transitions. [2021-04-15 05:13:27,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5235 transitions. [2021-04-15 05:13:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:27,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:27,255 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:27,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:27,455 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:27,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:27,456 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 22 times [2021-04-15 05:13:27,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:27,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165722273] [2021-04-15 05:13:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:27,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165722273] [2021-04-15 05:13:27,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500464062] [2021-04-15 05:13:27,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:13:27,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:13:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:28,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:28,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-04-15 05:13:28,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:28,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:28,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-04-15 05:13:28,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,283 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:28,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-04-15 05:13:28,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:28,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-04-15 05:13:28,325 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,338 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:28,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,353 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:28,354 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:28,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-04-15 05:13:28,373 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:28,386 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,402 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:28,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-04-15 05:13:28,404 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,418 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:28,419 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,436 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:13:28,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-04-15 05:13:28,437 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-04-15 05:13:28,457 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-04-15 05:13:28,470 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:28,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:13:28,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:28,479 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:28,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:28,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:28,571 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-04-15 05:13:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:28,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:28,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:13:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948802827] [2021-04-15 05:13:28,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:13:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:13:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:13:28,809 INFO L87 Difference]: Start difference. First operand 1554 states and 5235 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:29,466 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-04-15 05:13:29,673 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-04-15 05:13:30,211 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-04-15 05:13:30,397 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-04-15 05:13:30,643 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-04-15 05:13:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:30,765 INFO L93 Difference]: Finished difference Result 2012 states and 6621 transitions. [2021-04-15 05:13:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:13:30,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:30,768 INFO L225 Difference]: With dead ends: 2012 [2021-04-15 05:13:30,768 INFO L226 Difference]: Without dead ends: 1993 [2021-04-15 05:13:30,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2217.0ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:13:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-04-15 05:13:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1545. [2021-04-15 05:13:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3678756476683938) internal successors, (5200), 1544 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5200 transitions. [2021-04-15 05:13:30,788 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5200 transitions. Word has length 26 [2021-04-15 05:13:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:30,788 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5200 transitions. [2021-04-15 05:13:30,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5200 transitions. [2021-04-15 05:13:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:30,790 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:30,790 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:30,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1218,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:30,990 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:30,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 23 times [2021-04-15 05:13:30,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:30,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416213818] [2021-04-15 05:13:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:31,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416213818] [2021-04-15 05:13:31,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767921932] [2021-04-15 05:13:31,506 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 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 [2021-04-15 05:13:31,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:13:31,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 05:13:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:32,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:32,115 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:13:32,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:13:32,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:32,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:32,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:32,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:13:32,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:32,537 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-04-15 05:13:32,537 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-04-15 05:13:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:32,566 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:32,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:13:32,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:32,595 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:32,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:13:32,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:32,775 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 05:13:32,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:32,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:32,803 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:32,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:13:32,805 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:32,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:32,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:13:32,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:33,165 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-04-15 05:13:33,166 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-04-15 05:13:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:33,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:33,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:13:33,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:33,211 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:13:33,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:13:33,213 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:33,369 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-04-15 05:13:33,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:33,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:33,387 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:361, output treesize:309 [2021-04-15 05:13:33,689 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-04-15 05:13:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:33,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:33,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:13:33,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896128414] [2021-04-15 05:13:33,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:13:33,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:33,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:13:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:13:33,824 INFO L87 Difference]: Start difference. First operand 1545 states and 5200 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:33,982 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 29 [2021-04-15 05:13:34,598 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-04-15 05:13:35,216 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-04-15 05:13:35,974 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-04-15 05:13:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:36,045 INFO L93 Difference]: Finished difference Result 2065 states and 6802 transitions. [2021-04-15 05:13:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:13:36,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:36,049 INFO L225 Difference]: With dead ends: 2065 [2021-04-15 05:13:36,050 INFO L226 Difference]: Without dead ends: 2040 [2021-04-15 05:13:36,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2795.6ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:13:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-04-15 05:13:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1545. [2021-04-15 05:13:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3678756476683938) internal successors, (5200), 1544 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5200 transitions. [2021-04-15 05:13:36,069 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5200 transitions. Word has length 26 [2021-04-15 05:13:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:36,070 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5200 transitions. [2021-04-15 05:13:36,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5200 transitions. [2021-04-15 05:13:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:36,072 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:36,072 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:36,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-04-15 05:13:36,272 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-04-15 05:13:36,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:36,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578303876] [2021-04-15 05:13:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:36,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578303876] [2021-04-15 05:13:36,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901084854] [2021-04-15 05:13:36,852 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 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 [2021-04-15 05:13:36,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:13:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:36,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:36,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:37,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:13:37,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:13:37,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:13:37,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:13:37,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-04-15 05:13:37,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-04-15 05:13:37,552 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:13:37,563 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:13:37,575 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:13:37,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-04-15 05:13:37,601 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:13:37,615 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:13:37,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:13:37,638 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-04-15 05:13:37,651 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:13:37,662 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:37,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:13:37,668 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:37,707 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-04-15 05:13:37,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:13:37,708 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-04-15 05:13:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:37,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:37,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:13:37,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874014490] [2021-04-15 05:13:37,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:13:37,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:13:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:13:37,745 INFO L87 Difference]: Start difference. First operand 1545 states and 5200 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,123 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-04-15 05:13:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:39,212 INFO L93 Difference]: Finished difference Result 1992 states and 6522 transitions. [2021-04-15 05:13:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:39,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:39,216 INFO L225 Difference]: With dead ends: 1992 [2021-04-15 05:13:39,216 INFO L226 Difference]: Without dead ends: 1966 [2021-04-15 05:13:39,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1782.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:13:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-04-15 05:13:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1549. [2021-04-15 05:13:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.3656330749354004) internal successors, (5210), 1548 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5210 transitions. [2021-04-15 05:13:39,234 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5210 transitions. Word has length 26 [2021-04-15 05:13:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:39,234 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 5210 transitions. [2021-04-15 05:13:39,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5210 transitions. [2021-04-15 05:13:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:39,236 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:39,236 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:39,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-04-15 05:13:39,437 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-04-15 05:13:39,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:39,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923022794] [2021-04-15 05:13:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:39,628 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-04-15 05:13:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:39,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923022794] [2021-04-15 05:13:39,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050873141] [2021-04-15 05:13:39,977 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 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 [2021-04-15 05:13:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:40,326 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-04-15 05:13:40,384 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_97, v_prenex_95], 5=[A, v_prenex_93]} [2021-04-15 05:13:40,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:40,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:40,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:40,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-04-15 05:13:40,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:40,515 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-04-15 05:13:40,515 INFO L628 ElimStorePlain]: treesize reduction 146, result has 43.6 percent of original size [2021-04-15 05:13:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:40,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:40,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-04-15 05:13:40,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:40,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:40,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:40,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:13:40,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:40,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:40,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:13:40,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:40,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:40,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:13:40,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-04-15 05:13:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:40,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:40,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:13:40,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861080895] [2021-04-15 05:13:40,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:13:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:13:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:13:40,697 INFO L87 Difference]: Start difference. First operand 1549 states and 5210 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:42,975 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:13:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:43,142 INFO L93 Difference]: Finished difference Result 2165 states and 7087 transitions. [2021-04-15 05:13:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:13:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:43,145 INFO L225 Difference]: With dead ends: 2165 [2021-04-15 05:13:43,145 INFO L226 Difference]: Without dead ends: 2150 [2021-04-15 05:13:43,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2657.6ms TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:13:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-04-15 05:13:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1549. [2021-04-15 05:13:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.3656330749354004) internal successors, (5210), 1548 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5210 transitions. [2021-04-15 05:13:43,165 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5210 transitions. Word has length 26 [2021-04-15 05:13:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:43,165 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 5210 transitions. [2021-04-15 05:13:43,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5210 transitions. [2021-04-15 05:13:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:43,167 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:43,167 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:43,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1417,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:43,368 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 24 times [2021-04-15 05:13:43,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:43,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468670166] [2021-04-15 05:13:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:43,675 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-04-15 05:13:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:44,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468670166] [2021-04-15 05:13:44,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563265437] [2021-04-15 05:13:44,033 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 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 [2021-04-15 05:13:44,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:13:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:13:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:44,486 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-04-15 05:13:44,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:44,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:13:44,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,061 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-04-15 05:13:45,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,089 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:45,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:13:45,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,250 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-04-15 05:13:45,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,274 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:13:45,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:13:45,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,420 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-04-15 05:13:45,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,447 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:45,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:13:45,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,600 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-04-15 05:13:45,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:13:45,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,768 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-04-15 05:13:45,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,790 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:13:45,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:13:45,793 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,934 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-04-15 05:13:45,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:45,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:13:45,955 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:46,101 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-04-15 05:13:46,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:46,126 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:13:46,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:46,276 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-04-15 05:13:46,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:46,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:46,289 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:349, output treesize:430 [2021-04-15 05:13:46,628 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-04-15 05:13:46,776 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:13:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:46,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:46,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:13:46,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025746479] [2021-04-15 05:13:46,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:13:46,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:46,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:13:46,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:13:46,902 INFO L87 Difference]: Start difference. First operand 1549 states and 5210 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,131 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 27 [2021-04-15 05:13:47,419 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-04-15 05:13:47,661 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-04-15 05:13:47,932 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 05:13:48,170 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2021-04-15 05:13:48,488 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-04-15 05:13:48,651 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-04-15 05:13:49,086 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-04-15 05:13:49,658 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-04-15 05:13:50,013 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2021-04-15 05:13:50,424 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-04-15 05:13:51,083 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-04-15 05:13:51,526 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-04-15 05:13:52,221 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-04-15 05:13:52,836 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2021-04-15 05:13:53,602 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-04-15 05:13:54,144 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-04-15 05:13:54,665 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-04-15 05:13:55,134 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-04-15 05:13:55,445 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-04-15 05:13:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:55,593 INFO L93 Difference]: Finished difference Result 2516 states and 7932 transitions. [2021-04-15 05:13:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:13:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:55,597 INFO L225 Difference]: With dead ends: 2516 [2021-04-15 05:13:55,597 INFO L226 Difference]: Without dead ends: 2452 [2021-04-15 05:13:55,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 9332.4ms TimeCoverageRelationStatistics Valid=411, Invalid=1941, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:13:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-04-15 05:13:55,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1584. [2021-04-15 05:13:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.370183196462413) internal successors, (5335), 1583 states have internal predecessors, (5335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5335 transitions. [2021-04-15 05:13:55,618 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5335 transitions. Word has length 26 [2021-04-15 05:13:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:55,618 INFO L480 AbstractCegarLoop]: Abstraction has 1584 states and 5335 transitions. [2021-04-15 05:13:55,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5335 transitions. [2021-04-15 05:13:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:55,620 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:55,620 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:55,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1431,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:55,821 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:55,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-04-15 05:13:55,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:55,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5890457] [2021-04-15 05:13:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:56,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5890457] [2021-04-15 05:13:56,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725998271] [2021-04-15 05:13:56,432 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 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 [2021-04-15 05:13:56,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:13:56,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:56,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:13:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:56,889 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-04-15 05:13:57,295 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_139], 5=[v_prenex_141, v_prenex_137]} [2021-04-15 05:13:57,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,326 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:57,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:13:57,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,358 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:57,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:13:57,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,581 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 05:13:57,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,608 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:13:57,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:13:57,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:57,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:13:57,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,847 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-04-15 05:13:57,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:57,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,875 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:13:57,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-04-15 05:13:57,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:57,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-04-15 05:13:57,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:58,084 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-04-15 05:13:58,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:58,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:58,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,115 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:58,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-04-15 05:13:58,118 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:58,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:58,142 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:13:58,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-04-15 05:13:58,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:58,304 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-04-15 05:13:58,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:58,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:13:58,317 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-04-15 05:13:58,454 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 05:13:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:58,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:58,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:13:58,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074275951] [2021-04-15 05:13:58,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:13:58,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:13:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:13:58,510 INFO L87 Difference]: Start difference. First operand 1584 states and 5335 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:58,970 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-04-15 05:13:59,300 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2021-04-15 05:13:59,463 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-04-15 05:13:59,747 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-04-15 05:14:00,311 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-04-15 05:14:00,740 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-04-15 05:14:01,100 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-04-15 05:14:01,530 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-04-15 05:14:01,785 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-04-15 05:14:02,034 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-04-15 05:14:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:02,455 INFO L93 Difference]: Finished difference Result 2425 states and 7700 transitions. [2021-04-15 05:14:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:14:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:02,459 INFO L225 Difference]: With dead ends: 2425 [2021-04-15 05:14:02,460 INFO L226 Difference]: Without dead ends: 2381 [2021-04-15 05:14:02,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 4376.2ms TimeCoverageRelationStatistics Valid=486, Invalid=2376, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:14:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-04-15 05:14:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1591. [2021-04-15 05:14:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3710691823899372) internal successors, (5360), 1590 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5360 transitions. [2021-04-15 05:14:02,488 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5360 transitions. Word has length 26 [2021-04-15 05:14:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:02,488 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5360 transitions. [2021-04-15 05:14:02,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5360 transitions. [2021-04-15 05:14:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:02,490 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:02,490 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:02,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1479 [2021-04-15 05:14:02,691 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-04-15 05:14:02,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:02,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776246547] [2021-04-15 05:14:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:03,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776246547] [2021-04-15 05:14:03,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383413802] [2021-04-15 05:14:03,239 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 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 [2021-04-15 05:14:03,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:14:03,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:03,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 05:14:03,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:03,752 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-04-15 05:14:03,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:14:03,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:14:03,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:14:03,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:14:03,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:14:03,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-04-15 05:14:03,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-04-15 05:14:03,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:14:03,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:14:03,910 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-04-15 05:14:03,922 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:14:03,934 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:14:03,945 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-04-15 05:14:03,957 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-04-15 05:14:03,969 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:14:03,980 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:03,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:03,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:14:03,997 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:04,064 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-04-15 05:14:04,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:14:04,066 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:913, output treesize:59 [2021-04-15 05:14:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:04,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:04,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 05:14:04,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114969161] [2021-04-15 05:14:04,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:14:04,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:14:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:14:04,250 INFO L87 Difference]: Start difference. First operand 1591 states and 5360 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:04,751 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 05:14:05,157 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-04-15 05:14:05,778 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-04-15 05:14:05,913 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 05:14:06,097 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-04-15 05:14:06,601 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-04-15 05:14:06,755 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-04-15 05:14:06,951 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-04-15 05:14:07,655 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-04-15 05:14:07,864 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-04-15 05:14:08,109 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-04-15 05:14:08,506 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-04-15 05:14:08,830 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-04-15 05:14:09,081 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-04-15 05:14:09,362 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-04-15 05:14:09,579 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-04-15 05:14:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:10,277 INFO L93 Difference]: Finished difference Result 3601 states and 11187 transitions. [2021-04-15 05:14:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 05:14:10,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:10,283 INFO L225 Difference]: With dead ends: 3601 [2021-04-15 05:14:10,283 INFO L226 Difference]: Without dead ends: 3565 [2021-04-15 05:14:10,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 5948.4ms TimeCoverageRelationStatistics Valid=846, Invalid=4124, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 05:14:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2021-04-15 05:14:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 1723. [2021-04-15 05:14:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.3792102206736354) internal successors, (5819), 1722 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5819 transitions. [2021-04-15 05:14:10,310 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5819 transitions. Word has length 26 [2021-04-15 05:14:10,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:10,310 INFO L480 AbstractCegarLoop]: Abstraction has 1723 states and 5819 transitions. [2021-04-15 05:14:10,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5819 transitions. [2021-04-15 05:14:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:10,313 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:10,313 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:10,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1549,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:10,513 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:10,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 25 times [2021-04-15 05:14:10,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:10,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816981560] [2021-04-15 05:14:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:10,774 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-04-15 05:14:10,958 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-04-15 05:14:11,080 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-04-15 05:14:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816981560] [2021-04-15 05:14:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914014213] [2021-04-15 05:14:11,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:14:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:11,796 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:14:12,113 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-04-15 05:14:12,196 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_150, v_prenex_151], 3=[A, v_prenex_152]} [2021-04-15 05:14:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:12,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:12,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:12,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:14:12,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:14:12,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:12,394 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-04-15 05:14:12,394 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-04-15 05:14:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:12,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:14:12,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:12,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:12,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:14:12,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:12,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:12,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-04-15 05:14:12,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:12,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:12,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:14:12,581 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-04-15 05:14:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:12,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:12,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:14:12,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952211717] [2021-04-15 05:14:12,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:12,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:12,658 INFO L87 Difference]: Start difference. First operand 1723 states and 5819 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:13,014 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-04-15 05:14:13,261 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-04-15 05:14:13,657 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-04-15 05:14:13,913 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-04-15 05:14:14,400 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-04-15 05:14:14,627 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-04-15 05:14:15,041 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-04-15 05:14:15,607 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-04-15 05:14:15,983 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-04-15 05:14:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:16,241 INFO L93 Difference]: Finished difference Result 2316 states and 7537 transitions. [2021-04-15 05:14:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:14:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:16,245 INFO L225 Difference]: With dead ends: 2316 [2021-04-15 05:14:16,245 INFO L226 Difference]: Without dead ends: 2301 [2021-04-15 05:14:16,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4149.5ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:14:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-04-15 05:14:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1730. [2021-04-15 05:14:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.3817235396182763) internal successors, (5847), 1729 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5847 transitions. [2021-04-15 05:14:16,267 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5847 transitions. Word has length 26 [2021-04-15 05:14:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:16,267 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5847 transitions. [2021-04-15 05:14:16,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5847 transitions. [2021-04-15 05:14:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:16,269 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:16,269 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:16,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1569 [2021-04-15 05:14:16,470 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 26 times [2021-04-15 05:14:16,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:16,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000670432] [2021-04-15 05:14:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:16,685 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-04-15 05:14:16,930 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-04-15 05:14:17,096 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-04-15 05:14:17,225 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-04-15 05:14:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:17,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000670432] [2021-04-15 05:14:17,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256986253] [2021-04-15 05:14:17,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:17,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:17,834 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-04-15 05:14:18,056 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-04-15 05:14:18,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:14:18,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:18,240 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-04-15 05:14:18,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:18,280 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:14:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-04-15 05:14:18,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:18,480 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-04-15 05:14:18,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:18,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:18,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-04-15 05:14:18,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:18,906 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-04-15 05:14:18,906 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.6 percent of original size [2021-04-15 05:14:18,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:18,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-04-15 05:14:18,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:19,139 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-04-15 05:14:19,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:19,176 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:14:19,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-04-15 05:14:19,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:19,376 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-04-15 05:14:19,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:19,411 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:14:19,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-04-15 05:14:19,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:19,600 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-04-15 05:14:19,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:19,638 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:14:19,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-04-15 05:14:19,645 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:19,992 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-04-15 05:14:19,993 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.2 percent of original size [2021-04-15 05:14:20,035 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:14:20,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-04-15 05:14:20,037 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:20,220 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 05:14:20,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:20,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:14:20,253 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:745 [2021-04-15 05:14:20,883 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-04-15 05:14:21,307 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-04-15 05:14:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:21,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:21,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:14:21,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796044226] [2021-04-15 05:14:21,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:21,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:21,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:21,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:21,467 INFO L87 Difference]: Start difference. First operand 1730 states and 5847 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:21,669 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2021-04-15 05:14:21,877 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 34 [2021-04-15 05:14:22,342 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2021-04-15 05:14:22,479 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2021-04-15 05:14:22,699 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-04-15 05:14:22,967 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-04-15 05:14:23,440 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2021-04-15 05:14:23,704 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-04-15 05:14:23,923 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-04-15 05:14:24,478 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-04-15 05:14:24,868 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-04-15 05:14:25,625 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2021-04-15 05:14:26,163 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-04-15 05:14:26,706 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-04-15 05:14:27,295 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-04-15 05:14:27,828 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-04-15 05:14:28,491 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 114 [2021-04-15 05:14:29,275 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 111 [2021-04-15 05:14:30,238 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-04-15 05:14:30,818 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-04-15 05:14:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:30,980 INFO L93 Difference]: Finished difference Result 2958 states and 9371 transitions. [2021-04-15 05:14:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:14:30,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:30,985 INFO L225 Difference]: With dead ends: 2958 [2021-04-15 05:14:30,985 INFO L226 Difference]: Without dead ends: 2920 [2021-04-15 05:14:30,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 10668.3ms TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:14:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-04-15 05:14:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1734. [2021-04-15 05:14:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.385458742065782) internal successors, (5867), 1733 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5867 transitions. [2021-04-15 05:14:31,011 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5867 transitions. Word has length 26 [2021-04-15 05:14:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:31,011 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5867 transitions. [2021-04-15 05:14:31,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5867 transitions. [2021-04-15 05:14:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:31,013 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:31,013 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:31,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:31,217 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:31,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-04-15 05:14:31,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:31,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538193587] [2021-04-15 05:14:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538193587] [2021-04-15 05:14:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439439973] [2021-04-15 05:14:31,856 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 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 [2021-04-15 05:14:31,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:14:31,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-04-15 05:14:32,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:14:32,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:14:32,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:14:32,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:14:32,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:14:32,728 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:14:32,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-04-15 05:14:32,755 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:14:32,768 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:14:32,781 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-04-15 05:14:32,797 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:14:32,812 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-04-15 05:14:32,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:14:32,839 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:14:32,851 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:32,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:14:32,857 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,905 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-04-15 05:14:32,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:14:32,906 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-04-15 05:14:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:32,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:32,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:14:32,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801329504] [2021-04-15 05:14:32,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:14:32,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:14:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:32,961 INFO L87 Difference]: Start difference. First operand 1734 states and 5867 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:33,301 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-04-15 05:14:33,624 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-04-15 05:14:33,866 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-04-15 05:14:34,041 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-04-15 05:14:34,231 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-04-15 05:14:34,736 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-04-15 05:14:34,972 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-04-15 05:14:35,134 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-04-15 05:14:35,289 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:14:35,854 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:14:36,116 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-04-15 05:14:36,456 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-04-15 05:14:36,647 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-04-15 05:14:37,025 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-04-15 05:14:37,275 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-04-15 05:14:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:37,578 INFO L93 Difference]: Finished difference Result 3422 states and 10960 transitions. [2021-04-15 05:14:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:14:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:37,585 INFO L225 Difference]: With dead ends: 3422 [2021-04-15 05:14:37,586 INFO L226 Difference]: Without dead ends: 3386 [2021-04-15 05:14:37,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 4490.4ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 05:14:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-04-15 05:14:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 1843. [2021-04-15 05:14:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 3.4044516829533116) internal successors, (6271), 1842 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 6271 transitions. [2021-04-15 05:14:37,616 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 6271 transitions. Word has length 26 [2021-04-15 05:14:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:37,616 INFO L480 AbstractCegarLoop]: Abstraction has 1843 states and 6271 transitions. [2021-04-15 05:14:37,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 6271 transitions. [2021-04-15 05:14:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:37,618 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:37,618 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:37,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1632 [2021-04-15 05:14:37,818 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-04-15 05:14:37,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:37,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307263568] [2021-04-15 05:14:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:38,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307263568] [2021-04-15 05:14:38,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430985375] [2021-04-15 05:14:38,507 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 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 [2021-04-15 05:14:38,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:14:38,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:14:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,198 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 05:14:39,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-04-15 05:14:39,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,237 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:14:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-04-15 05:14:39,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,279 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:14:39,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-04-15 05:14:39,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,320 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:14:39,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-04-15 05:14:39,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,346 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:14:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:14:39,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,382 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-04-15 05:14:39,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-04-15 05:14:39,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,424 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:14:39,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-04-15 05:14:39,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,467 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:14:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:14:39,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:39,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-04-15 05:14:39,514 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,550 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:14:39,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-04-15 05:14:39,553 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,588 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:14:39,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-04-15 05:14:39,590 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,626 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-04-15 05:14:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-04-15 05:14:39,628 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,650 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:14:39,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:14:39,651 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,674 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:14:39,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-04-15 05:14:39,675 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,697 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:14:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:14:39,698 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:39,711 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:14:39,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:14:39,712 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:39,875 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-04-15 05:14:39,875 INFO L628 ElimStorePlain]: treesize reduction 168, result has 39.1 percent of original size [2021-04-15 05:14:39,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:14:39,877 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-04-15 05:14:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:40,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:40,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:14:40,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125286739] [2021-04-15 05:14:40,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:14:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:14:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:14:40,029 INFO L87 Difference]: Start difference. First operand 1843 states and 6271 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:40,385 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-04-15 05:14:40,750 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-04-15 05:14:41,032 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-04-15 05:14:41,198 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-04-15 05:14:41,386 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-04-15 05:14:41,927 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-04-15 05:14:42,101 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2021-04-15 05:14:42,336 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-04-15 05:14:42,501 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:14:43,022 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-04-15 05:14:43,193 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:14:43,399 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-04-15 05:14:43,756 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-04-15 05:14:44,120 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 05:14:44,308 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 05:14:44,543 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-04-15 05:14:44,898 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-04-15 05:14:45,086 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-04-15 05:14:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:45,314 INFO L93 Difference]: Finished difference Result 3849 states and 12222 transitions. [2021-04-15 05:14:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:14:45,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:45,320 INFO L225 Difference]: With dead ends: 3849 [2021-04-15 05:14:45,320 INFO L226 Difference]: Without dead ends: 3792 [2021-04-15 05:14:45,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5329.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:14:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-04-15 05:14:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 1871. [2021-04-15 05:14:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.4085561497326204) internal successors, (6374), 1870 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6374 transitions. [2021-04-15 05:14:45,350 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6374 transitions. Word has length 26 [2021-04-15 05:14:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:45,350 INFO L480 AbstractCegarLoop]: Abstraction has 1871 states and 6374 transitions. [2021-04-15 05:14:45,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6374 transitions. [2021-04-15 05:14:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:45,352 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:45,352 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:45,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:45,552 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 27 times [2021-04-15 05:14:45,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:45,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766771232] [2021-04-15 05:14:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:45,845 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-04-15 05:14:46,123 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-04-15 05:14:46,364 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-04-15 05:14:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:46,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766771232] [2021-04-15 05:14:46,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499165562] [2021-04-15 05:14:46,616 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 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 [2021-04-15 05:14:46,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:14:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:14:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:47,239 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-04-15 05:14:47,567 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-04-15 05:14:47,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:47,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:14:47,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:47,964 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-04-15 05:14:47,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:47,998 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:14:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:14:48,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:48,210 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-04-15 05:14:48,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:48,242 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:14:48,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:14:48,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:48,457 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-04-15 05:14:48,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:48,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:48,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:14:48,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:48,688 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-04-15 05:14:48,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:48,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:48,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:14:48,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:48,909 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-04-15 05:14:48,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:48,940 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:14:48,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:14:48,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:49,137 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-04-15 05:14:49,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:49,164 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:14:49,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:14:49,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:49,357 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-04-15 05:14:49,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:49,383 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:14:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:14:49,386 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:49,578 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-04-15 05:14:49,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:49,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:14:49,593 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:376 [2021-04-15 05:14:50,094 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:14:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:50,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:50,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:14:50,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354010056] [2021-04-15 05:14:50,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:14:50,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:14:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:14:50,263 INFO L87 Difference]: Start difference. First operand 1871 states and 6374 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:50,504 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2021-04-15 05:14:50,999 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-04-15 05:14:51,463 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2021-04-15 05:14:51,684 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:14:52,050 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-04-15 05:14:52,449 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-04-15 05:14:52,938 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-04-15 05:14:53,285 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-04-15 05:14:53,688 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-04-15 05:14:54,772 WARN L205 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2021-04-15 05:14:55,438 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2021-04-15 05:14:56,249 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-04-15 05:14:57,805 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 123 DAG size of output: 109 [2021-04-15 05:14:58,759 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 139 [2021-04-15 05:14:59,399 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 77 [2021-04-15 05:14:59,818 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:15:00,564 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-04-15 05:15:01,040 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-04-15 05:15:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:01,280 INFO L93 Difference]: Finished difference Result 2616 states and 8514 transitions. [2021-04-15 05:15:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:15:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:01,285 INFO L225 Difference]: With dead ends: 2616 [2021-04-15 05:15:01,285 INFO L226 Difference]: Without dead ends: 2571 [2021-04-15 05:15:01,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 11629.4ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:15:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-04-15 05:15:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1887. [2021-04-15 05:15:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.4056203605514317) internal successors, (6423), 1886 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 6423 transitions. [2021-04-15 05:15:01,310 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 6423 transitions. Word has length 26 [2021-04-15 05:15:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:01,310 INFO L480 AbstractCegarLoop]: Abstraction has 1887 states and 6423 transitions. [2021-04-15 05:15:01,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 6423 transitions. [2021-04-15 05:15:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:01,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:01,312 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:01,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-04-15 05:15:01,513 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:01,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 28 times [2021-04-15 05:15:01,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:01,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537895035] [2021-04-15 05:15:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:01,726 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-04-15 05:15:01,874 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-04-15 05:15:02,006 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-04-15 05:15:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:02,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537895035] [2021-04-15 05:15:02,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011565805] [2021-04-15 05:15:02,257 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 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 [2021-04-15 05:15:02,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:15:02,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:15:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,642 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:15:02,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:15:02,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:02,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:15:02,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,714 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:15:02,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:15:02,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:02,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:15:02,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,774 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:15:02,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:15:02,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,819 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:15:02,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:02,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:15:02,849 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,865 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:15:02,866 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,884 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:15:02,885 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,907 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:15:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:15:02,910 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:02,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:15:02,933 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,950 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:15:02,951 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,972 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:15:02,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:15:02,975 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:02,984 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:15:02,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:15:02,986 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:03,149 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:15:03,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:03,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:15:03,152 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:737, output treesize:229 [2021-04-15 05:15:03,346 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:15:03,567 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-04-15 05:15:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:03,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:03,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:15:03,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885150752] [2021-04-15 05:15:03,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:15:03,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:03,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:15:03,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:15:03,677 INFO L87 Difference]: Start difference. First operand 1887 states and 6423 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:03,835 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-04-15 05:15:03,998 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 05:15:04,488 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-04-15 05:15:05,130 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-04-15 05:15:05,433 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-04-15 05:15:06,102 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-04-15 05:15:06,473 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-04-15 05:15:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:06,697 INFO L93 Difference]: Finished difference Result 2525 states and 8371 transitions. [2021-04-15 05:15:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:15:06,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:06,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:06,702 INFO L225 Difference]: With dead ends: 2525 [2021-04-15 05:15:06,702 INFO L226 Difference]: Without dead ends: 2479 [2021-04-15 05:15:06,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 3352.4ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:15:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-04-15 05:15:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1905. [2021-04-15 05:15:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.409138655462185) internal successors, (6491), 1904 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6491 transitions. [2021-04-15 05:15:06,726 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6491 transitions. Word has length 26 [2021-04-15 05:15:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:06,726 INFO L480 AbstractCegarLoop]: Abstraction has 1905 states and 6491 transitions. [2021-04-15 05:15:06,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6491 transitions. [2021-04-15 05:15:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:06,729 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:06,729 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:06,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1873,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:06,929 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 29 times [2021-04-15 05:15:06,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:06,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417891249] [2021-04-15 05:15:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:07,199 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-04-15 05:15:07,369 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-04-15 05:15:07,530 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:15:07,648 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-04-15 05:15:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:07,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417891249] [2021-04-15 05:15:07,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094270192] [2021-04-15 05:15:07,814 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 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 [2021-04-15 05:15:07,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:15:07,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:15:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:08,173 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:15:08,407 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 05:15:08,796 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-04-15 05:15:08,871 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_208, v_prenex_209, v_prenex_214], 3=[v_prenex_217, A, v_prenex_210, v_prenex_213, v_prenex_216]} [2021-04-15 05:15:08,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:08,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:15:08,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:09,163 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-04-15 05:15:09,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:09,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:09,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:15:09,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:09,450 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-04-15 05:15:09,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:09,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:09,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:15:09,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:09,711 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-04-15 05:15:09,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:09,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:09,735 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:15:09,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-04-15 05:15:09,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:09,971 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-04-15 05:15:09,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:09,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:09,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:09,992 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:15:09,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-04-15 05:15:09,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:10,225 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-04-15 05:15:10,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:10,246 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:15:10,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-04-15 05:15:10,249 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:10,467 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-04-15 05:15:10,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:10,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:10,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:10,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-04-15 05:15:10,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:10,702 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-04-15 05:15:10,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:10,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:10,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:10,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:15:10,728 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:10,927 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-04-15 05:15:10,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:10,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:15:10,938 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:383, output treesize:212 [2021-04-15 05:15:11,292 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-04-15 05:15:11,450 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-04-15 05:15:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:11,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:11,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:15:11,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672877392] [2021-04-15 05:15:11,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:15:11,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:15:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:15:11,502 INFO L87 Difference]: Start difference. First operand 1905 states and 6491 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:11,792 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 28 [2021-04-15 05:15:12,274 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-04-15 05:15:12,672 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-04-15 05:15:13,161 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2021-04-15 05:15:13,446 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-04-15 05:15:13,870 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-04-15 05:15:14,981 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-04-15 05:15:15,696 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-04-15 05:15:16,187 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-04-15 05:15:16,761 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 05:15:17,669 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-04-15 05:15:17,934 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:15:18,496 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-04-15 05:15:18,697 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-04-15 05:15:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:18,795 INFO L93 Difference]: Finished difference Result 2754 states and 9026 transitions. [2021-04-15 05:15:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:15:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:18,801 INFO L225 Difference]: With dead ends: 2754 [2021-04-15 05:15:18,801 INFO L226 Difference]: Without dead ends: 2720 [2021-04-15 05:15:18,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 8064.0ms TimeCoverageRelationStatistics Valid=328, Invalid=1478, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:15:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-04-15 05:15:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1898. [2021-04-15 05:15:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.4059040590405902) internal successors, (6461), 1897 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 6461 transitions. [2021-04-15 05:15:18,826 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 6461 transitions. Word has length 26 [2021-04-15 05:15:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:18,826 INFO L480 AbstractCegarLoop]: Abstraction has 1898 states and 6461 transitions. [2021-04-15 05:15:18,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 6461 transitions. [2021-04-15 05:15:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:18,828 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:18,829 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:19,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:19,029 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-04-15 05:15:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:19,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863028059] [2021-04-15 05:15:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:19,293 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-04-15 05:15:19,454 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-04-15 05:15:19,583 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-04-15 05:15:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:19,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863028059] [2021-04-15 05:15:19,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342219505] [2021-04-15 05:15:19,945 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 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 [2021-04-15 05:15:19,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:15:19,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:15:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-04-15 05:15:20,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:15:20,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:15:20,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:15:20,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:20,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:15:21,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:15:21,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-04-15 05:15:21,038 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:15:21,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-04-15 05:15:21,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:15:21,091 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:15:21,109 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-04-15 05:15:21,126 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:15:21,142 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:15:21,159 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:15:21,175 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:15:21,185 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,250 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-04-15 05:15:21,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:15:21,252 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-04-15 05:15:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:21,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:21,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:15:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195406376] [2021-04-15 05:15:21,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:15:21,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:15:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:15:21,315 INFO L87 Difference]: Start difference. First operand 1898 states and 6461 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:21,970 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-04-15 05:15:22,143 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-04-15 05:15:22,347 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-04-15 05:15:22,547 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-04-15 05:15:22,770 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-04-15 05:15:22,965 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-04-15 05:15:23,135 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-04-15 05:15:23,284 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-04-15 05:15:23,461 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 05:15:23,719 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-04-15 05:15:23,906 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-04-15 05:15:24,078 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2021-04-15 05:15:24,651 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-04-15 05:15:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:24,822 INFO L93 Difference]: Finished difference Result 2380 states and 7875 transitions. [2021-04-15 05:15:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:15:24,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:24,827 INFO L225 Difference]: With dead ends: 2380 [2021-04-15 05:15:24,827 INFO L226 Difference]: Without dead ends: 2358 [2021-04-15 05:15:24,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3930.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:15:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-04-15 05:15:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1890. [2021-04-15 05:15:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4033880359978825) internal successors, (6429), 1889 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6429 transitions. [2021-04-15 05:15:24,850 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6429 transitions. Word has length 26 [2021-04-15 05:15:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:24,850 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6429 transitions. [2021-04-15 05:15:24,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6429 transitions. [2021-04-15 05:15:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:24,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:24,852 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:25,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1906,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:25,053 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-04-15 05:15:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:25,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953344969] [2021-04-15 05:15:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:25,350 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-04-15 05:15:25,531 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-04-15 05:15:25,661 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-04-15 05:15:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:25,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953344969] [2021-04-15 05:15:25,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529162220] [2021-04-15 05:15:25,961 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 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 [2021-04-15 05:15:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:25,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:15:25,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:26,583 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-04-15 05:15:26,675 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_221], 6=[v_prenex_219, v_prenex_223]} [2021-04-15 05:15:26,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:26,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:26,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:15:26,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:26,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:26,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2021-04-15 05:15:26,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:26,899 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-04-15 05:15:26,900 INFO L628 ElimStorePlain]: treesize reduction 170, result has 42.4 percent of original size [2021-04-15 05:15:26,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:26,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-04-15 05:15:26,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:26,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:26,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:26,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:26,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-04-15 05:15:26,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:27,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:27,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:27,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:15:27,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:27,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:27,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:15:27,122 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:43 [2021-04-15 05:15:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:27,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:27,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:15:27,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844980883] [2021-04-15 05:15:27,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:15:27,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:15:27,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:15:27,220 INFO L87 Difference]: Start difference. First operand 1890 states and 6429 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:28,405 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-04-15 05:15:28,569 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2021-04-15 05:15:29,196 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-04-15 05:15:29,364 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-04-15 05:15:29,527 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-04-15 05:15:29,761 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-04-15 05:15:30,145 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-04-15 05:15:30,391 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-04-15 05:15:30,700 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-04-15 05:15:30,965 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-04-15 05:15:31,648 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-04-15 05:15:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:31,939 INFO L93 Difference]: Finished difference Result 2577 states and 8513 transitions. [2021-04-15 05:15:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:15:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:31,944 INFO L225 Difference]: With dead ends: 2577 [2021-04-15 05:15:31,944 INFO L226 Difference]: Without dead ends: 2562 [2021-04-15 05:15:31,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 4943.0ms TimeCoverageRelationStatistics Valid=476, Invalid=1876, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:15:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-04-15 05:15:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1890. [2021-04-15 05:15:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4033880359978825) internal successors, (6429), 1889 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6429 transitions. [2021-04-15 05:15:31,968 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6429 transitions. Word has length 26 [2021-04-15 05:15:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:31,968 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6429 transitions. [2021-04-15 05:15:31,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6429 transitions. [2021-04-15 05:15:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:31,970 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:31,970 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:32,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-04-15 05:15:32,170 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-04-15 05:15:32,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:32,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578736825] [2021-04-15 05:15:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:32,708 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-04-15 05:15:32,829 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-04-15 05:15:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:33,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578736825] [2021-04-15 05:15:33,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898764581] [2021-04-15 05:15:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:15:33,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:15:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:15:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,191 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-04-15 05:15:34,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-04-15 05:15:34,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,291 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-04-15 05:15:34,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 40 [2021-04-15 05:15:34,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,388 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-04-15 05:15:34,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-04-15 05:15:34,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,484 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-04-15 05:15:34,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-04-15 05:15:34,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,584 INFO L354 Elim1Store]: treesize reduction 17, result has 62.2 percent of original size [2021-04-15 05:15:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 46 [2021-04-15 05:15:34,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,676 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-04-15 05:15:34,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-04-15 05:15:34,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,786 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-04-15 05:15:34,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-04-15 05:15:34,805 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,903 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-04-15 05:15:34,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-04-15 05:15:34,910 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:34,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:34,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-04-15 05:15:35,006 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:35,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:35,110 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-04-15 05:15:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-04-15 05:15:35,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:35,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:35,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 63 [2021-04-15 05:15:35,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:35,263 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-04-15 05:15:35,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-04-15 05:15:35,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:35,357 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-04-15 05:15:35,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-04-15 05:15:35,369 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:35,409 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-04-15 05:15:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-04-15 05:15:35,411 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:35,509 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-04-15 05:15:35,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-04-15 05:15:35,512 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:35,548 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-04-15 05:15:35,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-04-15 05:15:35,549 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:37,063 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-04-15 05:15:37,063 INFO L628 ElimStorePlain]: treesize reduction 357, result has 50.3 percent of original size [2021-04-15 05:15:37,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-04-15 05:15:37,070 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:402 [2021-04-15 05:15:37,653 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-04-15 05:15:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:37,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 05:15:37,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681537988] [2021-04-15 05:15:37,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:15:37,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:15:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:37,879 INFO L87 Difference]: Start difference. First operand 1890 states and 6429 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:38,374 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-04-15 05:15:38,538 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-04-15 05:15:38,964 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-04-15 05:15:39,333 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-04-15 05:15:39,501 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-04-15 05:15:39,764 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-04-15 05:15:39,963 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-04-15 05:15:40,563 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-04-15 05:15:40,863 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-04-15 05:15:41,038 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-04-15 05:15:41,558 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-04-15 05:15:42,047 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-04-15 05:15:42,777 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-04-15 05:15:42,986 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-04-15 05:15:43,182 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-04-15 05:15:43,412 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 05:15:43,678 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-04-15 05:15:43,955 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-04-15 05:15:44,195 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-04-15 05:15:44,430 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:15:44,681 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-04-15 05:15:45,234 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-04-15 05:15:45,802 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-04-15 05:15:46,207 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-04-15 05:15:46,614 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-04-15 05:15:46,998 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-04-15 05:15:47,297 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-04-15 05:15:47,601 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:15:48,077 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-04-15 05:15:48,701 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-04-15 05:15:48,999 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-04-15 05:15:49,338 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-04-15 05:15:49,571 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-04-15 05:15:49,748 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-04-15 05:15:50,284 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-04-15 05:15:50,666 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-04-15 05:15:51,075 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-04-15 05:15:51,257 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-04-15 05:15:51,512 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-04-15 05:15:51,749 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-04-15 05:15:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:51,839 INFO L93 Difference]: Finished difference Result 3267 states and 10417 transitions. [2021-04-15 05:15:51,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:15:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:51,845 INFO L225 Difference]: With dead ends: 3267 [2021-04-15 05:15:51,845 INFO L226 Difference]: Without dead ends: 3226 [2021-04-15 05:15:51,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 14214.3ms TimeCoverageRelationStatistics Valid=871, Invalid=4531, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 05:15:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-04-15 05:15:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 1912. [2021-04-15 05:15:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 3.3966509680795394) internal successors, (6491), 1911 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 6491 transitions. [2021-04-15 05:15:51,873 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 6491 transitions. Word has length 26 [2021-04-15 05:15:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:51,874 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 6491 transitions. [2021-04-15 05:15:51,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 6491 transitions. [2021-04-15 05:15:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:51,876 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:51,876 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:52,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2026,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:52,077 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:52,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:52,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-04-15 05:15:52,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:52,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039583693] [2021-04-15 05:15:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:52,308 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-04-15 05:15:52,448 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-04-15 05:15:52,757 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-04-15 05:15:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:53,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039583693] [2021-04-15 05:15:53,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159197567] [2021-04-15 05:15:53,024 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 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 [2021-04-15 05:15:53,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:15:53,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:53,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:15:53,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,057 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-04-15 05:15:54,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 45 [2021-04-15 05:15:54,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,121 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-04-15 05:15:54,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 28 [2021-04-15 05:15:54,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,179 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-04-15 05:15:54,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 25 [2021-04-15 05:15:54,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,252 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-04-15 05:15:54,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2021-04-15 05:15:54,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,323 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-04-15 05:15:54,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 25 [2021-04-15 05:15:54,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,381 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-04-15 05:15:54,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 25 [2021-04-15 05:15:54,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,452 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-04-15 05:15:54,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-04-15 05:15:54,460 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,500 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:15:54,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:15:54,501 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,537 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:15:54,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-04-15 05:15:54,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,574 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:15:54,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-04-15 05:15:54,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,616 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:15:54,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:15:54,618 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,652 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:15:54,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:15:54,654 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,688 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:15:54,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:15:54,689 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,747 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-04-15 05:15:54,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-04-15 05:15:54,750 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-04-15 05:15:54,843 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:54,868 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:15:54,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:15:54,870 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:55,129 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 05:15:55,130 INFO L628 ElimStorePlain]: treesize reduction 157, result has 50.3 percent of original size [2021-04-15 05:15:55,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:15:55,132 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-04-15 05:15:55,284 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:15:55,520 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-04-15 05:15:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:55,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:55,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-04-15 05:15:55,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251645004] [2021-04-15 05:15:55,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:15:55,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:55,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:15:55,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:15:55,614 INFO L87 Difference]: Start difference. First operand 1912 states and 6491 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:56,339 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-04-15 05:15:56,671 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-04-15 05:15:56,905 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-04-15 05:15:57,252 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-04-15 05:15:57,459 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-04-15 05:15:57,682 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2021-04-15 05:15:58,062 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-04-15 05:15:58,583 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-04-15 05:15:58,961 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-04-15 05:15:59,339 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-04-15 05:15:59,644 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-04-15 05:15:59,875 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:16:00,149 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:16:00,501 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-04-15 05:16:00,878 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:16:01,320 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-04-15 05:16:01,524 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-04-15 05:16:01,858 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-04-15 05:16:02,038 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:16:02,438 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-04-15 05:16:02,794 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-04-15 05:16:03,315 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-04-15 05:16:03,672 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 05:16:03,927 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-04-15 05:16:04,588 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-04-15 05:16:04,965 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-04-15 05:16:05,262 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-04-15 05:16:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:05,470 INFO L93 Difference]: Finished difference Result 3131 states and 10142 transitions. [2021-04-15 05:16:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 05:16:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:05,477 INFO L225 Difference]: With dead ends: 3131 [2021-04-15 05:16:05,477 INFO L226 Difference]: Without dead ends: 3075 [2021-04-15 05:16:05,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 10154.1ms TimeCoverageRelationStatistics Valid=663, Invalid=3243, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:16:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-04-15 05:16:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 1900. [2021-04-15 05:16:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 3.3933649289099526) internal successors, (6444), 1899 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 6444 transitions. [2021-04-15 05:16:05,513 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 6444 transitions. Word has length 26 [2021-04-15 05:16:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:05,513 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 6444 transitions. [2021-04-15 05:16:05,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 6444 transitions. [2021-04-15 05:16:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:05,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:05,515 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:05,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2189 [2021-04-15 05:16:05,716 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-04-15 05:16:05,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:05,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432892505] [2021-04-15 05:16:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:06,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432892505] [2021-04-15 05:16:06,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26339233] [2021-04-15 05:16:06,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:16:06,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:16:06,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:07,133 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 05:16:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:07,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:07,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:07,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-04-15 05:16:07,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:07,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:07,713 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:16:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-04-15 05:16:07,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:09,037 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 164 DAG size of output: 153 [2021-04-15 05:16:09,038 INFO L628 ElimStorePlain]: treesize reduction 40, result has 94.9 percent of original size [2021-04-15 05:16:09,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:09,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-04-15 05:16:09,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,137 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:16:09,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:16:09,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:09,728 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-04-15 05:16:09,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:09,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,795 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:16:09,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-04-15 05:16:09,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:09,844 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 05:16:09,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-04-15 05:16:09,848 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:10,433 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-04-15 05:16:10,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:10,497 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:16:10,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-04-15 05:16:10,506 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:10,531 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:16:10,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:16:10,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:11,047 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-04-15 05:16:11,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,112 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:16:11,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-04-15 05:16:11,120 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,188 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-04-15 05:16:11,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-04-15 05:16:11,196 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:11,700 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-04-15 05:16:11,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,766 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:16:11,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-04-15 05:16:11,771 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:11,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:11,815 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 05:16:11,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-04-15 05:16:11,818 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:12,289 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-04-15 05:16:12,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:12,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:12,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-04-15 05:16:12,361 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,404 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:16:12,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-04-15 05:16:12,408 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:12,870 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-04-15 05:16:12,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,940 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:16:12,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-04-15 05:16:12,949 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:12,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:12,973 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:16:12,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-04-15 05:16:12,975 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:13,345 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-04-15 05:16:13,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:13,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-04-15 05:16:13,362 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-04-15 05:16:13,716 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-04-15 05:16:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:13,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:13,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:16:13,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258627489] [2021-04-15 05:16:13,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:16:13,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:13,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:16:13,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:16:13,812 INFO L87 Difference]: Start difference. First operand 1900 states and 6444 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:14,202 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-04-15 05:16:14,434 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:16:14,612 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-04-15 05:16:14,977 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-04-15 05:16:15,191 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-04-15 05:16:15,744 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-04-15 05:16:17,460 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-04-15 05:16:30,607 WARN L205 SmtUtils]: Spent 12.95 s on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-04-15 05:16:30,815 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:16:31,146 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-04-15 05:16:31,490 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-04-15 05:16:31,751 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 05:16:32,060 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-04-15 05:16:32,233 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-04-15 05:16:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:32,518 INFO L93 Difference]: Finished difference Result 2531 states and 8249 transitions. [2021-04-15 05:16:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:16:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:32,524 INFO L225 Difference]: With dead ends: 2531 [2021-04-15 05:16:32,524 INFO L226 Difference]: Without dead ends: 2486 [2021-04-15 05:16:32,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 18300.1ms TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 05:16:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-04-15 05:16:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1911. [2021-04-15 05:16:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.399476439790576) internal successors, (6493), 1910 states have internal predecessors, (6493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6493 transitions. [2021-04-15 05:16:32,554 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6493 transitions. Word has length 26 [2021-04-15 05:16:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:32,554 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 6493 transitions. [2021-04-15 05:16:32,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6493 transitions. [2021-04-15 05:16:32,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:32,556 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:32,556 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:32,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2318,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:32,756 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 53 times [2021-04-15 05:16:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:32,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492584197] [2021-04-15 05:16:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:33,044 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-04-15 05:16:33,196 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-04-15 05:16:33,390 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-04-15 05:16:33,521 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-04-15 05:16:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:33,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492584197] [2021-04-15 05:16:33,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469035942] [2021-04-15 05:16:33,759 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 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 [2021-04-15 05:16:33,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:16:33,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:33,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:16:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:34,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-04-15 05:16:34,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 59 [2021-04-15 05:16:34,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,609 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-04-15 05:16:34,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 40 [2021-04-15 05:16:34,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,702 INFO L354 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2021-04-15 05:16:34,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 36 [2021-04-15 05:16:34,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,752 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:16:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:16:34,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,827 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-04-15 05:16:34,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 23 [2021-04-15 05:16:34,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,915 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-04-15 05:16:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 32 [2021-04-15 05:16:34,919 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,965 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:16:34,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:16:34,967 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,040 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-04-15 05:16:35,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 26 [2021-04-15 05:16:35,043 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,105 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:16:35,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:16:35,107 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,179 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-04-15 05:16:35,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 26 [2021-04-15 05:16:35,183 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,230 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:16:35,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:16:35,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,320 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-04-15 05:16:35,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 36 [2021-04-15 05:16:35,331 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,401 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-04-15 05:16:35,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 27 [2021-04-15 05:16:35,406 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,450 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:16:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:16:35,452 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:35,480 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-04-15 05:16:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:16:35,482 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:35,774 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-04-15 05:16:35,775 INFO L628 ElimStorePlain]: treesize reduction 230, result has 32.2 percent of original size [2021-04-15 05:16:35,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:16:35,777 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:109 [2021-04-15 05:16:35,934 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 05:16:36,097 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:16:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:36,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:36,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-04-15 05:16:36,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363247621] [2021-04-15 05:16:36,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:36,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:36,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:36,250 INFO L87 Difference]: Start difference. First operand 1911 states and 6493 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:36,846 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-04-15 05:16:37,144 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-04-15 05:16:37,579 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-04-15 05:16:37,834 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-04-15 05:16:38,116 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2021-04-15 05:16:38,551 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 05:16:38,842 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-04-15 05:16:39,083 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-04-15 05:16:39,368 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-04-15 05:16:39,777 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-04-15 05:16:40,025 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-04-15 05:16:40,249 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-04-15 05:16:40,476 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-04-15 05:16:40,749 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-04-15 05:16:41,044 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 05:16:41,461 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-04-15 05:16:41,734 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-04-15 05:16:42,130 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2021-04-15 05:16:42,534 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-04-15 05:16:42,757 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-04-15 05:16:43,397 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-04-15 05:16:44,158 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2021-04-15 05:16:44,811 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-04-15 05:16:45,383 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-04-15 05:16:46,106 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-04-15 05:16:46,861 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2021-04-15 05:16:47,290 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-04-15 05:16:47,846 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-04-15 05:16:48,551 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-04-15 05:16:48,790 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2021-04-15 05:16:49,171 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-04-15 05:16:50,081 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-04-15 05:16:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:50,165 INFO L93 Difference]: Finished difference Result 3133 states and 9939 transitions. [2021-04-15 05:16:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:16:50,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:50,172 INFO L225 Difference]: With dead ends: 3133 [2021-04-15 05:16:50,172 INFO L226 Difference]: Without dead ends: 3095 [2021-04-15 05:16:50,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 12648.7ms TimeCoverageRelationStatistics Valid=642, Invalid=2898, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:16:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-04-15 05:16:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 1918. [2021-04-15 05:16:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.4042775169535733) internal successors, (6526), 1917 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6526 transitions. [2021-04-15 05:16:50,199 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6526 transitions. Word has length 26 [2021-04-15 05:16:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:50,199 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 6526 transitions. [2021-04-15 05:16:50,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6526 transitions. [2021-04-15 05:16:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:50,201 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:50,201 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:50,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2386 [2021-04-15 05:16:50,409 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 30 times [2021-04-15 05:16:50,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:50,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372250037] [2021-04-15 05:16:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:50,749 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-04-15 05:16:50,922 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-04-15 05:16:51,083 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 05:16:51,204 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-04-15 05:16:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:51,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372250037] [2021-04-15 05:16:51,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588226076] [2021-04-15 05:16:51,267 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 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 [2021-04-15 05:16:51,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:16:51,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:16:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:51,746 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:16:52,246 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-04-15 05:16:52,486 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 05:16:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:53,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:53,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:16:53,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:53,113 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:16:53,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:16:53,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:53,534 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-04-15 05:16:53,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:53,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:53,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:16:53,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:53,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:53,639 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:16:53,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:16:53,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:54,039 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-04-15 05:16:54,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:54,097 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:16:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:16:54,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:54,157 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:16:54,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:16:54,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:54,540 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-04-15 05:16:54,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:54,593 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:16:54,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:16:54,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:54,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:54,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:54,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:16:54,646 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:54,997 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-04-15 05:16:54,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:55,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:16:55,038 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:357, output treesize:334 [2021-04-15 05:16:55,715 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-04-15 05:16:55,942 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:16:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:55,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:55,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:16:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748869198] [2021-04-15 05:16:55,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:16:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:16:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:16:55,962 INFO L87 Difference]: Start difference. First operand 1918 states and 6526 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:56,232 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-04-15 05:16:56,732 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-04-15 05:16:57,324 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:16:57,707 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2021-04-15 05:16:58,157 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-04-15 05:16:58,893 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-04-15 05:16:59,699 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2021-04-15 05:17:01,035 WARN L205 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2021-04-15 05:17:01,244 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 05:17:01,806 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-04-15 05:17:02,340 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-04-15 05:17:02,925 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-04-15 05:17:03,403 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-04-15 05:17:04,184 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-04-15 05:17:04,832 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-04-15 05:17:05,547 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-04-15 05:17:06,466 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-04-15 05:17:07,475 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-04-15 05:17:08,198 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-04-15 05:17:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:08,401 INFO L93 Difference]: Finished difference Result 2567 states and 8413 transitions. [2021-04-15 05:17:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:17:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:17:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:08,406 INFO L225 Difference]: With dead ends: 2567 [2021-04-15 05:17:08,406 INFO L226 Difference]: Without dead ends: 2537 [2021-04-15 05:17:08,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 12188.7ms TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:17:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-04-15 05:17:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1920. [2021-04-15 05:17:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 3.4048983845753) internal successors, (6534), 1919 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 6534 transitions. [2021-04-15 05:17:08,430 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 6534 transitions. Word has length 26 [2021-04-15 05:17:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:08,430 INFO L480 AbstractCegarLoop]: Abstraction has 1920 states and 6534 transitions. [2021-04-15 05:17:08,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 6534 transitions. [2021-04-15 05:17:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:17:08,432 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:08,432 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:08,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2423 [2021-04-15 05:17:08,633 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:08,634 INFO L82 PathProgramCache]: Analyzing trace with hash -589649742, now seen corresponding path program 31 times [2021-04-15 05:17:08,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:08,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191585960] [2021-04-15 05:17:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:09,025 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-04-15 05:17:09,423 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-04-15 05:17:09,795 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-04-15 05:17:09,976 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-04-15 05:17:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:10,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191585960] [2021-04-15 05:17:10,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591363753] [2021-04-15 05:17:10,095 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 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 [2021-04-15 05:17:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:10,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:10,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:10,566 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:17:10,830 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 05:17:11,569 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-04-15 05:17:11,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:11,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:11,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:17:11,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:11,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:11,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:17:11,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:12,040 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:17:12,041 INFO L628 ElimStorePlain]: treesize reduction 55, result has 68.4 percent of original size [2021-04-15 05:17:12,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:12,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:12,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:17:12,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:12,185 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:17:12,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:17:12,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:12,334 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:17:12,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:12,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:17:12,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-04-15 05:17:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:12,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:12,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:17:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263816742] [2021-04-15 05:17:12,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:12,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:12,511 INFO L87 Difference]: Start difference. First operand 1920 states and 6534 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:12,690 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-04-15 05:17:13,194 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-04-15 05:17:13,465 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-04-15 05:17:14,190 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-04-15 05:17:14,350 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:17:14,719 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-04-15 05:17:14,983 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:17:15,735 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-04-15 05:17:16,109 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-04-15 05:17:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:16,373 INFO L93 Difference]: Finished difference Result 2316 states and 7767 transitions. [2021-04-15 05:17:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:17:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:17:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:16,379 INFO L225 Difference]: With dead ends: 2316 [2021-04-15 05:17:16,379 INFO L226 Difference]: Without dead ends: 2301 [2021-04-15 05:17:16,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 5325.3ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:17:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-04-15 05:17:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1912. [2021-04-15 05:17:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 3.4081632653061225) internal successors, (6513), 1911 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 6513 transitions. [2021-04-15 05:17:16,401 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 6513 transitions. Word has length 26 [2021-04-15 05:17:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:16,401 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 6513 transitions. [2021-04-15 05:17:16,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:16,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 6513 transitions. [2021-04-15 05:17:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:17:16,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:16,403 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:16,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2489 [2021-04-15 05:17:16,618 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 32 times [2021-04-15 05:17:16,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:16,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025515165] [2021-04-15 05:17:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:17,068 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-04-15 05:17:17,273 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-04-15 05:17:17,434 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 05:17:17,585 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 05:17:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:17,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025515165] [2021-04-15 05:17:17,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041205152] [2021-04-15 05:17:17,681 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 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 [2021-04-15 05:17:17,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:17,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:17:17,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:18,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:17:18,390 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:17:18,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-04-15 05:17:18,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-04-15 05:17:18,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-04-15 05:17:18,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-04-15 05:17:18,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-04-15 05:17:18,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-04-15 05:17:18,619 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-04-15 05:17:18,637 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-04-15 05:17:18,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-04-15 05:17:18,676 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-04-15 05:17:18,697 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-04-15 05:17:18,716 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 26 [2021-04-15 05:17:18,734 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2021-04-15 05:17:18,752 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-04-15 05:17:18,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-04-15 05:17:18,787 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:18,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:18,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:18,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-04-15 05:17:18,800 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:19,158 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-04-15 05:17:19,159 INFO L628 ElimStorePlain]: treesize reduction 343, result has 25.3 percent of original size [2021-04-15 05:17:19,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:17:19,161 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:116 [2021-04-15 05:17:19,343 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 05:17:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:19,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:19,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:17:19,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626700838] [2021-04-15 05:17:19,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:17:19,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:19,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:17:19,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:17:19,510 INFO L87 Difference]: Start difference. First operand 1912 states and 6513 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:19,727 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-04-15 05:17:20,213 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-04-15 05:17:20,581 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-04-15 05:17:21,082 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-04-15 05:17:21,810 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 05:17:22,327 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-04-15 05:17:22,485 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:17:23,131 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-04-15 05:17:23,499 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 05:17:23,938 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-04-15 05:17:24,215 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:17:24,920 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-04-15 05:17:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:25,288 INFO L93 Difference]: Finished difference Result 2750 states and 9029 transitions. [2021-04-15 05:17:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:17:25,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:17:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:25,295 INFO L225 Difference]: With dead ends: 2750 [2021-04-15 05:17:25,295 INFO L226 Difference]: Without dead ends: 2714 [2021-04-15 05:17:25,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 5987.9ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:17:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-04-15 05:17:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1938. [2021-04-15 05:17:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4021683014971607) internal successors, (6590), 1937 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6590 transitions. [2021-04-15 05:17:25,322 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6590 transitions. Word has length 26 [2021-04-15 05:17:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:25,323 INFO L480 AbstractCegarLoop]: Abstraction has 1938 states and 6590 transitions. [2021-04-15 05:17:25,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6590 transitions. [2021-04-15 05:17:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:17:25,325 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:25,325 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:25,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:25,526 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1013178648, now seen corresponding path program 33 times [2021-04-15 05:17:25,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:25,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785008458] [2021-04-15 05:17:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:25,894 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-04-15 05:17:26,151 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 05:17:26,320 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-04-15 05:17:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:26,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785008458] [2021-04-15 05:17:26,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517654424] [2021-04-15 05:17:26,471 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 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 [2021-04-15 05:17:26,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:17:26,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:26,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:27,079 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:17:27,356 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 05:17:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:27,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:17:27,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:17:27,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:28,611 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-04-15 05:17:28,612 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.0 percent of original size [2021-04-15 05:17:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:28,672 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:17:28,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:17:28,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:28,735 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:17:28,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:17:28,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:29,171 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-04-15 05:17:29,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:29,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:29,239 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:17:29,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:17:29,242 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:29,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:29,291 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:17:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:17:29,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:29,730 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-04-15 05:17:29,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:29,798 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:17:29,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:17:29,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:29,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:17:29,863 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:30,261 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-04-15 05:17:30,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:30,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:17:30,304 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:357, output treesize:292 [2021-04-15 05:17:31,060 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-04-15 05:17:31,322 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-04-15 05:17:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:31,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:31,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-04-15 05:17:31,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593317038] [2021-04-15 05:17:31,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:17:31,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:17:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:17:31,362 INFO L87 Difference]: Start difference. First operand 1938 states and 6590 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:31,745 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-04-15 05:17:32,021 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-04-15 05:17:32,518 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2021-04-15 05:17:33,400 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-04-15 05:17:34,652 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-04-15 05:17:35,182 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 47 [2021-04-15 05:17:35,997 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-04-15 05:17:36,862 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-04-15 05:17:37,496 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-04-15 05:17:38,483 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-04-15 05:17:38,944 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2021-04-15 05:17:39,458 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2021-04-15 05:17:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:39,565 INFO L93 Difference]: Finished difference Result 2529 states and 8394 transitions. [2021-04-15 05:17:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:17:39,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:17:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:39,571 INFO L225 Difference]: With dead ends: 2529 [2021-04-15 05:17:39,571 INFO L226 Difference]: Without dead ends: 2514 [2021-04-15 05:17:39,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 9504.6ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:17:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-04-15 05:17:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1937. [2021-04-15 05:17:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.4008264462809916) internal successors, (6584), 1936 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6584 transitions. [2021-04-15 05:17:39,595 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6584 transitions. Word has length 26 [2021-04-15 05:17:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:39,595 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 6584 transitions. [2021-04-15 05:17:39,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6584 transitions. [2021-04-15 05:17:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:17:39,597 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:39,597 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:39,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2527 [2021-04-15 05:17:39,801 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash -964138634, now seen corresponding path program 34 times [2021-04-15 05:17:39,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:39,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708578904] [2021-04-15 05:17:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:40,246 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-04-15 05:17:40,689 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-04-15 05:17:40,861 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-04-15 05:17:41,018 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 05:17:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708578904] [2021-04-15 05:17:41,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55736468] [2021-04-15 05:17:41,096 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 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 [2021-04-15 05:17:41,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:17:41,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:41,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:41,583 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:17:42,242 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-04-15 05:17:43,178 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2021-04-15 05:17:43,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:43,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:17:43,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:43,972 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-04-15 05:17:43,973 INFO L628 ElimStorePlain]: treesize reduction 62, result has 72.6 percent of original size [2021-04-15 05:17:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 05:17:43,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:44,189 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 05:17:44,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:44,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:44,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:17:44,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:44,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:44,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:17:44,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:44,387 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:17:44,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:44,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:44,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:44,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:17:44,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:44,549 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:17:44,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:44,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:17:44,556 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:247, output treesize:51 [2021-04-15 05:17:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:44,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:44,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:17:44,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766858241] [2021-04-15 05:17:44,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:44,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:44,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:44,722 INFO L87 Difference]: Start difference. First operand 1937 states and 6584 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:44,943 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2021-04-15 05:17:45,603 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-04-15 05:17:45,951 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-04-15 05:17:46,866 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-04-15 05:17:47,047 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:17:47,441 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-04-15 05:17:47,819 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-04-15 05:17:48,136 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:17:49,581 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 146 DAG size of output: 126 [2021-04-15 05:17:50,239 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-04-15 05:17:51,149 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-04-15 05:17:52,314 WARN L205 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 122 [2021-04-15 05:17:52,831 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 05:17:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:53,310 INFO L93 Difference]: Finished difference Result 2833 states and 9241 transitions. [2021-04-15 05:17:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:17:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:17:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:53,317 INFO L225 Difference]: With dead ends: 2833 [2021-04-15 05:17:53,317 INFO L226 Difference]: Without dead ends: 2788 [2021-04-15 05:17:53,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 9679.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:17:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-04-15 05:17:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 1948. [2021-04-15 05:17:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.403697996918336) internal successors, (6627), 1947 states have internal predecessors, (6627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6627 transitions. [2021-04-15 05:17:53,342 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6627 transitions. Word has length 26 [2021-04-15 05:17:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:53,342 INFO L480 AbstractCegarLoop]: Abstraction has 1948 states and 6627 transitions. [2021-04-15 05:17:53,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6627 transitions. [2021-04-15 05:17:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:17:53,344 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:53,345 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:53,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2569 [2021-04-15 05:17:53,545 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1713295882, now seen corresponding path program 35 times [2021-04-15 05:17:53,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:53,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977320969] [2021-04-15 05:17:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:54,056 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-04-15 05:17:54,317 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-04-15 05:17:54,522 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-04-15 05:17:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977320969] [2021-04-15 05:17:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626278973] [2021-04-15 05:17:54,713 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 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 [2021-04-15 05:17:54,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:17:54,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:17:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:55,142 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:17:55,304 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:17:55,839 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:17:55,957 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_305, A, v_prenex_293, v_prenex_295, v_prenex_297, v_prenex_301], 3=[v_prenex_299, v_prenex_303]} [2021-04-15 05:17:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:55,992 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:17:55,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:17:55,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:56,367 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-04-15 05:17:56,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:56,404 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:17:56,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:17:56,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:56,784 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-04-15 05:17:56,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:56,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:56,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:56,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:17:56,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:57,216 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-04-15 05:17:57,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:57,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:17:57,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:57,626 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-04-15 05:17:57,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:57,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:57,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:17:57,662 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,018 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-04-15 05:17:58,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:17:58,055 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,388 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 05:17:58,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,425 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:17:58,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-04-15 05:17:58,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,760 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-04-15 05:17:58,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-04-15 05:17:58,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:59,100 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-04-15 05:17:59,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:59,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:17:59,112 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-04-15 05:17:59,429 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:17:59,683 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:17:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:59,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:59,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:17:59,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123096353] [2021-04-15 05:17:59,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:17:59,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:59,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:17:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:17:59,753 INFO L87 Difference]: Start difference. First operand 1948 states and 6627 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:00,031 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-04-15 05:18:00,546 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-04-15 05:18:00,879 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-04-15 05:18:01,167 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 05:18:01,876 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-04-15 05:18:02,392 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2021-04-15 05:18:02,572 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:18:02,971 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-04-15 05:18:03,553 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:18:04,675 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-04-15 05:18:06,525 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2021-04-15 05:18:06,869 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:18:07,515 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-04-15 05:18:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:07,865 INFO L93 Difference]: Finished difference Result 2625 states and 8640 transitions. [2021-04-15 05:18:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:18:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:18:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:07,872 INFO L225 Difference]: With dead ends: 2625 [2021-04-15 05:18:07,872 INFO L226 Difference]: Without dead ends: 2595 [2021-04-15 05:18:07,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 9365.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 05:18:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-04-15 05:18:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 1935. [2021-04-15 05:18:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1934 states have (on average 3.4012409513960704) internal successors, (6578), 1934 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 6578 transitions. [2021-04-15 05:18:07,897 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 6578 transitions. Word has length 26 [2021-04-15 05:18:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:07,897 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 6578 transitions. [2021-04-15 05:18:07,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 6578 transitions. [2021-04-15 05:18:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:18:07,899 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:07,899 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:08,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2582,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:08,099 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:08,100 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 36 times [2021-04-15 05:18:08,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:08,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946847400] [2021-04-15 05:18:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:08,453 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-04-15 05:18:08,651 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-04-15 05:18:08,831 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 05:18:08,999 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 05:18:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:09,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946847400] [2021-04-15 05:18:09,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717613948] [2021-04-15 05:18:09,097 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 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 [2021-04-15 05:18:09,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:18:09,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:18:09,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:09,868 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:18:10,465 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-04-15 05:18:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:11,196 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:11,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:18:11,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:11,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:11,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:11,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:18:11,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:11,792 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-04-15 05:18:11,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:11,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:11,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:11,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:18:11,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:11,946 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:18:11,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:18:11,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:12,477 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-04-15 05:18:12,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:12,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:12,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:12,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:18:12,542 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:12,600 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:18:12,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:18:12,604 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:13,094 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-04-15 05:18:13,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:13,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:13,171 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:13,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:18:13,183 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:13,248 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:13,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:18:13,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:13,735 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-04-15 05:18:13,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:13,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:18:13,787 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:365 [2021-04-15 05:18:14,692 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-04-15 05:18:14,950 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-04-15 05:18:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:14,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:14,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:18:14,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302529929] [2021-04-15 05:18:14,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:18:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:18:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:18:14,979 INFO L87 Difference]: Start difference. First operand 1935 states and 6578 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:15,271 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-04-15 05:18:15,805 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-04-15 05:18:16,139 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 05:18:16,610 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-04-15 05:18:17,044 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-04-15 05:18:17,422 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 05:18:18,137 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-04-15 05:18:18,518 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 05:18:19,113 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2021-04-15 05:18:19,495 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:18:19,960 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-04-15 05:18:21,060 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-04-15 05:18:21,703 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-04-15 05:18:22,441 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-04-15 05:18:23,108 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-04-15 05:18:23,772 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-04-15 05:18:24,640 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-04-15 05:18:25,888 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-04-15 05:18:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:26,042 INFO L93 Difference]: Finished difference Result 2627 states and 8594 transitions. [2021-04-15 05:18:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:18:26,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:18:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:26,049 INFO L225 Difference]: With dead ends: 2627 [2021-04-15 05:18:26,049 INFO L226 Difference]: Without dead ends: 2587 [2021-04-15 05:18:26,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 11793.9ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:18:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-04-15 05:18:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1944. [2021-04-15 05:18:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 3.4040144107050954) internal successors, (6614), 1943 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 6614 transitions. [2021-04-15 05:18:26,073 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 6614 transitions. Word has length 26 [2021-04-15 05:18:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:26,073 INFO L480 AbstractCegarLoop]: Abstraction has 1944 states and 6614 transitions. [2021-04-15 05:18:26,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 6614 transitions. [2021-04-15 05:18:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:18:26,075 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:26,075 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:26,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2597,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:26,290 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:26,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 37 times [2021-04-15 05:18:26,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:26,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230864479] [2021-04-15 05:18:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:26,738 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 05:18:26,894 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 05:18:27,060 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-04-15 05:18:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230864479] [2021-04-15 05:18:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689666683] [2021-04-15 05:18:27,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:18:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:18:27,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:27,856 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:18:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:28,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:18:28,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,194 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:18:28,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:18:28,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:28,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:18:28,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:18:28,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,317 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:18:28,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:18:28,321 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,353 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:18:28,356 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,383 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:18:28,387 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,415 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:18:28,418 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,460 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:18:28,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:18:28,465 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:28,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:18:28,511 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,540 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:18:28,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:28,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:18:28,586 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,615 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:18:28,618 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:18:28,668 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:18:28,700 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:28,716 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:18:28,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:18:28,719 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:29,001 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:18:29,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:29,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:18:29,011 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-04-15 05:18:29,310 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:18:29,568 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:18:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:29,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:29,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:18:29,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066455780] [2021-04-15 05:18:29,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:18:29,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:29,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:18:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:18:29,636 INFO L87 Difference]: Start difference. First operand 1944 states and 6614 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:30,186 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-04-15 05:18:30,346 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-04-15 05:18:31,078 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 05:18:31,473 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:18:31,952 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-04-15 05:18:32,451 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:18:33,222 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-04-15 05:18:33,685 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 05:18:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:33,899 INFO L93 Difference]: Finished difference Result 2697 states and 8928 transitions. [2021-04-15 05:18:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:18:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:18:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:33,907 INFO L225 Difference]: With dead ends: 2697 [2021-04-15 05:18:33,907 INFO L226 Difference]: Without dead ends: 2672 [2021-04-15 05:18:33,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 5065.0ms TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:18:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-15 05:18:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1935. [2021-04-15 05:18:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1934 states have (on average 3.4012409513960704) internal successors, (6578), 1934 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 6578 transitions. [2021-04-15 05:18:33,932 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 6578 transitions. Word has length 26 [2021-04-15 05:18:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:33,932 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 6578 transitions. [2021-04-15 05:18:33,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 6578 transitions. [2021-04-15 05:18:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:18:33,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:33,935 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:34,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2667 [2021-04-15 05:18:34,135 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 38 times [2021-04-15 05:18:34,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:34,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191347457] [2021-04-15 05:18:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:34,559 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-04-15 05:18:34,696 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-04-15 05:18:34,959 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-04-15 05:18:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191347457] [2021-04-15 05:18:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149968502] [2021-04-15 05:18:35,058 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 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 [2021-04-15 05:18:35,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:18:35,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:18:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:35,850 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:18:36,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:36,441 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:18:36,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:18:36,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:36,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:36,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:18:36,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:37,024 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:18:37,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:37,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:37,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:37,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:18:37,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:37,178 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:18:37,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:18:37,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:38,139 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-04-15 05:18:38,140 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-04-15 05:18:38,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:38,221 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:38,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:18:38,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:38,300 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:38,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:18:38,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:38,753 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-04-15 05:18:38,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:38,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:38,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:38,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:18:38,823 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:38,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:38,887 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:38,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:18:38,891 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:39,750 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-04-15 05:18:39,751 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-04-15 05:18:39,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:18:39,807 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-04-15 05:18:40,559 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-04-15 05:18:40,837 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:18:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:40,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:40,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-04-15 05:18:40,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099620216] [2021-04-15 05:18:40,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:18:40,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:18:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:18:40,892 INFO L87 Difference]: Start difference. First operand 1935 states and 6578 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:41,376 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-04-15 05:18:41,684 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-04-15 05:18:42,081 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:18:42,442 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-04-15 05:18:42,869 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:18:43,460 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 05:18:44,215 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-04-15 05:18:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:44,368 INFO L93 Difference]: Finished difference Result 2142 states and 7177 transitions. [2021-04-15 05:18:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:18:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:18:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:44,374 INFO L225 Difference]: With dead ends: 2142 [2021-04-15 05:18:44,374 INFO L226 Difference]: Without dead ends: 2117 [2021-04-15 05:18:44,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4842.4ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:18:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-04-15 05:18:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1917. [2021-04-15 05:18:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 3.405010438413361) internal successors, (6524), 1916 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 6524 transitions. [2021-04-15 05:18:44,396 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 6524 transitions. Word has length 26 [2021-04-15 05:18:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:44,396 INFO L480 AbstractCegarLoop]: Abstraction has 1917 states and 6524 transitions. [2021-04-15 05:18:44,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 6524 transitions. [2021-04-15 05:18:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:18:44,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:44,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:44,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2704 [2021-04-15 05:18:44,598 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 39 times [2021-04-15 05:18:44,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:44,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775479817] [2021-04-15 05:18:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:44,999 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-04-15 05:18:45,216 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-04-15 05:18:45,392 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-04-15 05:18:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775479817] [2021-04-15 05:18:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061150479] [2021-04-15 05:18:45,514 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 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 [2021-04-15 05:18:45,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:18:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:18:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:46,033 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:18:46,524 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-04-15 05:18:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:47,170 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:18:47,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:18:47,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:47,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:47,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:18:47,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:48,324 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-04-15 05:18:48,326 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.7 percent of original size [2021-04-15 05:18:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:48,407 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:18:48,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:18:48,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:48,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:48,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:18:48,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:49,003 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-04-15 05:18:49,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:49,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:49,087 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:18:49,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:49,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:49,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:18:49,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:50,117 WARN L205 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-04-15 05:18:50,118 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-04-15 05:18:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:50,199 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:50,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:18:50,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:50,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:50,287 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:18:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:18:50,292 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:50,782 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 05:18:50,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:50,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:18:50,825 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:381, output treesize:277 [2021-04-15 05:18:51,622 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-04-15 05:18:51,920 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-04-15 05:18:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:51,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:51,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:18:51,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62248632] [2021-04-15 05:18:51,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:18:51,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:51,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:18:51,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:18:51,994 INFO L87 Difference]: Start difference. First operand 1917 states and 6524 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:53,108 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-04-15 05:18:53,733 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-04-15 05:18:54,257 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:18:54,611 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-04-15 05:18:55,383 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 05:18:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:55,557 INFO L93 Difference]: Finished difference Result 2427 states and 8111 transitions. [2021-04-15 05:18:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:18:55,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:18:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:55,564 INFO L225 Difference]: With dead ends: 2427 [2021-04-15 05:18:55,564 INFO L226 Difference]: Without dead ends: 2402 [2021-04-15 05:18:55,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5076.5ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:18:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-04-15 05:18:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1906. [2021-04-15 05:18:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.4031496062992126) internal successors, (6483), 1905 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6483 transitions. [2021-04-15 05:18:55,596 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6483 transitions. Word has length 26 [2021-04-15 05:18:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:55,596 INFO L480 AbstractCegarLoop]: Abstraction has 1906 states and 6483 transitions. [2021-04-15 05:18:55,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6483 transitions. [2021-04-15 05:18:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:18:55,599 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:55,599 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:55,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-04-15 05:18:55,799 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 40 times [2021-04-15 05:18:55,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:55,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887632978] [2021-04-15 05:18:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:56,192 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-04-15 05:18:56,424 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-04-15 05:18:56,697 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-04-15 05:18:56,952 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-04-15 05:18:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887632978] [2021-04-15 05:18:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414431809] [2021-04-15 05:18:57,008 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 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 [2021-04-15 05:18:57,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:18:57,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:18:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:57,635 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:18:58,364 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-04-15 05:18:59,186 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2021-04-15 05:18:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:59,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:18:59,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:18:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:18:59,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:59,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:18:59,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:18:59,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:59,994 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:18:59,995 INFO L628 ElimStorePlain]: treesize reduction 55, result has 68.4 percent of original size [2021-04-15 05:19:00,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:00,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:19:00,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:00,201 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:19:00,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:00,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:19:00,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:19:00,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:00,405 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:19:00,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:00,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:19:00,413 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-04-15 05:19:00,568 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:19:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:00,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:00,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:19:00,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695699336] [2021-04-15 05:19:00,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:19:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:19:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:19:00,622 INFO L87 Difference]: Start difference. First operand 1906 states and 6483 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:00,816 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-04-15 05:19:01,368 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-04-15 05:19:02,282 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-04-15 05:19:02,424 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:19:02,768 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-04-15 05:19:03,081 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 05:19:03,530 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:19:04,313 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-04-15 05:19:05,936 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 116 DAG size of output: 95 [2021-04-15 05:19:06,471 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-04-15 05:19:06,943 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:19:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:07,029 INFO L93 Difference]: Finished difference Result 2670 states and 8741 transitions. [2021-04-15 05:19:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:19:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:19:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:07,037 INFO L225 Difference]: With dead ends: 2670 [2021-04-15 05:19:07,037 INFO L226 Difference]: Without dead ends: 2625 [2021-04-15 05:19:07,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 7624.2ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:19:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-04-15 05:19:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1911. [2021-04-15 05:19:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.4078534031413614) internal successors, (6509), 1910 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6509 transitions. [2021-04-15 05:19:07,060 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6509 transitions. Word has length 26 [2021-04-15 05:19:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:07,060 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 6509 transitions. [2021-04-15 05:19:07,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6509 transitions. [2021-04-15 05:19:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:19:07,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:07,062 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:07,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2819,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:07,263 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1098739190, now seen corresponding path program 41 times [2021-04-15 05:19:07,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:07,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612589958] [2021-04-15 05:19:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:07,904 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-04-15 05:19:08,409 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-04-15 05:19:08,668 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 05:19:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:08,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612589958] [2021-04-15 05:19:08,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555902986] [2021-04-15 05:19:08,895 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 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 [2021-04-15 05:19:08,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:19:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:19:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:09,624 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:19:10,462 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-04-15 05:19:10,602 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_366, v_prenex_369, v_prenex_359], 3=[v_prenex_360, v_prenex_361, v_prenex_363, v_prenex_364]} [2021-04-15 05:19:10,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:10,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:10,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:19:10,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:11,090 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-04-15 05:19:11,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:11,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:11,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:19:11,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:11,597 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-04-15 05:19:11,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:11,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:11,639 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:19:11,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:19:11,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:12,101 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-04-15 05:19:12,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:12,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:12,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:19:12,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:12,578 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-04-15 05:19:12,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:12,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:12,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-04-15 05:19:12,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:13,064 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-04-15 05:19:13,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:13,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:13,106 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:19:13,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-04-15 05:19:13,112 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:13,526 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-04-15 05:19:13,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:13,567 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:19:13,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-04-15 05:19:13,572 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:13,971 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-04-15 05:19:13,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:13,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:14,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:14,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:19:14,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:14,395 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:19:14,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:14,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:19:14,410 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:329, output treesize:194 [2021-04-15 05:19:14,802 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:19:15,097 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-04-15 05:19:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:15,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:15,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:19:15,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698092867] [2021-04-15 05:19:15,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:19:15,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:15,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:19:15,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:19:15,177 INFO L87 Difference]: Start difference. First operand 1911 states and 6509 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:15,409 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-04-15 05:19:15,661 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:19:16,100 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-04-15 05:19:16,912 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-04-15 05:19:17,394 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-04-15 05:19:18,013 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:19:18,905 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-04-15 05:19:20,341 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-04-15 05:19:20,824 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:19:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:21,299 INFO L93 Difference]: Finished difference Result 2475 states and 8242 transitions. [2021-04-15 05:19:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:19:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:19:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:21,306 INFO L225 Difference]: With dead ends: 2475 [2021-04-15 05:19:21,306 INFO L226 Difference]: Without dead ends: 2456 [2021-04-15 05:19:21,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 8092.6ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:19:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-04-15 05:19:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1892. [2021-04-15 05:19:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.401374933897409) internal successors, (6432), 1891 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6432 transitions. [2021-04-15 05:19:21,329 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6432 transitions. Word has length 26 [2021-04-15 05:19:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:21,329 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 6432 transitions. [2021-04-15 05:19:21,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6432 transitions. [2021-04-15 05:19:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:19:21,331 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:21,331 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:21,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2831,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:21,532 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:21,532 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 42 times [2021-04-15 05:19:21,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:21,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337393191] [2021-04-15 05:19:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:21,883 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 05:19:22,051 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-04-15 05:19:22,255 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 05:19:22,444 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 05:19:22,609 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-04-15 05:19:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:22,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337393191] [2021-04-15 05:19:22,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984242010] [2021-04-15 05:19:22,612 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 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 [2021-04-15 05:19:22,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:19:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:19:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:23,488 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:19:24,160 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:19:24,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:25,021 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:19:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:19:25,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:25,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:25,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:25,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:19:25,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:25,699 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-04-15 05:19:25,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:25,790 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:19:25,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:19:25,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:25,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:25,883 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:19:25,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:19:25,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:26,464 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-04-15 05:19:26,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:26,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:26,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:19:26,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:26,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:26,617 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:19:26,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:19:26,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:27,184 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-04-15 05:19:27,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:27,295 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:19:27,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:19:27,309 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:27,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:27,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:19:27,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:27,868 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 05:19:27,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:27,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:19:27,922 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:329 [2021-04-15 05:19:28,821 WARN L205 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:19:29,142 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:19:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:29,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:29,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:19:29,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611518697] [2021-04-15 05:19:29,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:19:29,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:29,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:19:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:19:29,173 INFO L87 Difference]: Start difference. First operand 1892 states and 6432 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:29,586 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-04-15 05:19:29,956 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-04-15 05:19:30,565 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-04-15 05:19:30,978 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 05:19:31,567 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-04-15 05:19:32,318 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-04-15 05:19:33,080 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-04-15 05:19:33,844 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2021-04-15 05:19:34,693 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-04-15 05:19:35,150 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:19:35,686 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:19:36,725 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-04-15 05:19:37,422 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 05:19:39,071 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-04-15 05:19:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:39,164 INFO L93 Difference]: Finished difference Result 2514 states and 8295 transitions. [2021-04-15 05:19:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:19:39,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:19:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:39,171 INFO L225 Difference]: With dead ends: 2514 [2021-04-15 05:19:39,171 INFO L226 Difference]: Without dead ends: 2484 [2021-04-15 05:19:39,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 11555.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 05:19:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-04-15 05:19:39,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1937. [2021-04-15 05:19:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.396694214876033) internal successors, (6576), 1936 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6576 transitions. [2021-04-15 05:19:39,194 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6576 transitions. Word has length 26 [2021-04-15 05:19:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:39,195 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 6576 transitions. [2021-04-15 05:19:39,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6576 transitions. [2021-04-15 05:19:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:19:39,197 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:39,197 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:39,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2847,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:39,397 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 43 times [2021-04-15 05:19:39,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:39,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76552058] [2021-04-15 05:19:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:39,780 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 05:19:39,953 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-04-15 05:19:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:40,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76552058] [2021-04-15 05:19:40,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075717343] [2021-04-15 05:19:40,305 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 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 [2021-04-15 05:19:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:40,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:19:40,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:40,829 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:19:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:41,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:41,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:19:41,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:41,710 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:19:41,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-04-15 05:19:41,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:41,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:41,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:41,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2021-04-15 05:19:41,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:41,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:41,803 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:41,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2021-04-15 05:19:41,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:41,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:41,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2021-04-15 05:19:41,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:41,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:41,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2021-04-15 05:19:41,938 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:41,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:41,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:19:41,984 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:41,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,028 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-04-15 05:19:42,031 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,068 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-04-15 05:19:42,072 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,108 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-04-15 05:19:42,112 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,148 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-04-15 05:19:42,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,204 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:19:42,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:19:42,211 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,250 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-04-15 05:19:42,254 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:19:42,312 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,347 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-04-15 05:19:42,351 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:42,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:19:42,406 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,448 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-04-15 05:19:42,451 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:19:42,492 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:19:42,532 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,567 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-04-15 05:19:42,571 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,607 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-04-15 05:19:42,611 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,645 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:19:42,649 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 05:19:42,661 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-04-15 05:19:42,701 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,734 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:19:42,737 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,768 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-04-15 05:19:42,772 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,803 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-04-15 05:19:42,806 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,837 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:19:42,841 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:19:42,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-04-15 05:19:42,889 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-04-15 05:19:42,924 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,958 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:19:42,961 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:42,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:42,984 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:19:42,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-04-15 05:19:42,987 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:43,741 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-04-15 05:19:43,743 INFO L628 ElimStorePlain]: treesize reduction 99, result has 68.3 percent of original size [2021-04-15 05:19:43,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:19:43,753 INFO L247 ElimStorePlain]: Needed 33 recursive calls to eliminate 2 variables, input treesize:1449, output treesize:182 [2021-04-15 05:19:44,126 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:19:44,446 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-04-15 05:19:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:44,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:44,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:44,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377935313] [2021-04-15 05:19:44,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:44,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:44,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:44,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:44,532 INFO L87 Difference]: Start difference. First operand 1937 states and 6576 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:44,724 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-04-15 05:19:45,280 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-04-15 05:19:46,129 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:19:46,629 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-04-15 05:19:47,171 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:19:48,069 WARN L205 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-04-15 05:19:48,888 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-04-15 05:19:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:49,155 INFO L93 Difference]: Finished difference Result 2649 states and 8796 transitions. [2021-04-15 05:19:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:19:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:19:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:49,162 INFO L225 Difference]: With dead ends: 2649 [2021-04-15 05:19:49,162 INFO L226 Difference]: Without dead ends: 2634 [2021-04-15 05:19:49,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5334.9ms TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:19:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-04-15 05:19:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 1938. [2021-04-15 05:19:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.398038203407331) internal successors, (6582), 1937 states have internal predecessors, (6582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6582 transitions. [2021-04-15 05:19:49,186 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6582 transitions. Word has length 26 [2021-04-15 05:19:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:49,187 INFO L480 AbstractCegarLoop]: Abstraction has 1938 states and 6582 transitions. [2021-04-15 05:19:49,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6582 transitions. [2021-04-15 05:19:49,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:19:49,189 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:49,189 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:49,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2911 [2021-04-15 05:19:49,389 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 44 times [2021-04-15 05:19:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:49,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167206230] [2021-04-15 05:19:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:49,785 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 05:19:49,990 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 05:19:50,239 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-04-15 05:19:50,477 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-04-15 05:19:50,692 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2021-04-15 05:19:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:50,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167206230] [2021-04-15 05:19:50,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391201605] [2021-04-15 05:19:50,695 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 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 [2021-04-15 05:19:50,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:19:50,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:50,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:19:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:51,414 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:19:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:52,140 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:19:52,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:19:52,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:52,227 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:19:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:19:52,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:52,899 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 05:19:52,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:52,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:52,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2021-04-15 05:19:52,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:53,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:53,083 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:19:53,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-04-15 05:19:53,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:54,318 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-04-15 05:19:54,319 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-04-15 05:19:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:54,407 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:19:54,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:19:54,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:54,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:54,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:19:54,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:55,074 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:19:55,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:55,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:55,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:55,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2021-04-15 05:19:55,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:55,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:19:55,253 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:19:55,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:19:55,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:56,326 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-04-15 05:19:56,327 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-04-15 05:19:56,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:19:56,369 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:389, output treesize:298 [2021-04-15 05:19:57,435 WARN L205 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-04-15 05:19:57,747 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-04-15 05:19:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:57,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:57,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:19:57,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902141504] [2021-04-15 05:19:57,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:19:57,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:19:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:19:57,808 INFO L87 Difference]: Start difference. First operand 1938 states and 6582 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:58,413 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:19:59,520 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-04-15 05:19:59,873 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 05:20:00,248 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-04-15 05:20:00,681 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:20:01,796 WARN L205 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-04-15 05:20:02,412 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-04-15 05:20:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:02,489 INFO L93 Difference]: Finished difference Result 2483 states and 8296 transitions. [2021-04-15 05:20:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:20:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:20:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:02,497 INFO L225 Difference]: With dead ends: 2483 [2021-04-15 05:20:02,497 INFO L226 Difference]: Without dead ends: 2468 [2021-04-15 05:20:02,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 7070.2ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:20:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-04-15 05:20:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1941. [2021-04-15 05:20:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 3.4010309278350515) internal successors, (6598), 1940 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 6598 transitions. [2021-04-15 05:20:02,522 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 6598 transitions. Word has length 26 [2021-04-15 05:20:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:02,523 INFO L480 AbstractCegarLoop]: Abstraction has 1941 states and 6598 transitions. [2021-04-15 05:20:02,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 6598 transitions. [2021-04-15 05:20:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:20:02,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:02,525 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:02,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:02,725 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:02,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 45 times [2021-04-15 05:20:02,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:02,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125997284] [2021-04-15 05:20:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:03,102 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-04-15 05:20:03,562 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-04-15 05:20:03,739 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-04-15 05:20:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125997284] [2021-04-15 05:20:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531052807] [2021-04-15 05:20:03,983 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 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 [2021-04-15 05:20:04,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:20:04,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:20:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:04,745 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:20:05,065 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-04-15 05:20:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:05,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:05,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:20:05,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:05,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:05,971 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:20:05,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:20:05,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:07,284 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2021-04-15 05:20:07,285 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-04-15 05:20:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:07,375 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:20:07,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:20:07,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:07,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:07,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:20:07,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:08,102 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-04-15 05:20:08,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:08,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:08,203 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:20:08,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:20:08,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:08,287 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:20:08,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:20:08,301 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:08,868 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-04-15 05:20:08,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:08,957 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:20:08,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:20:08,963 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:09,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:09,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:20:09,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:10,174 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-04-15 05:20:10,175 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-04-15 05:20:10,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:20:10,223 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:373, output treesize:282 [2021-04-15 05:20:11,246 WARN L205 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-04-15 05:20:11,588 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-04-15 05:20:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:11,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:11,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:20:11,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483550646] [2021-04-15 05:20:11,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:20:11,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:11,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:20:11,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:20:11,653 INFO L87 Difference]: Start difference. First operand 1941 states and 6598 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:13,004 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-04-15 05:20:13,647 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-04-15 05:20:13,982 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 05:20:14,402 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:20:15,058 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-04-15 05:20:15,958 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-04-15 05:20:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:16,129 INFO L93 Difference]: Finished difference Result 2513 states and 8392 transitions. [2021-04-15 05:20:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:20:16,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:20:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:16,136 INFO L225 Difference]: With dead ends: 2513 [2021-04-15 05:20:16,136 INFO L226 Difference]: Without dead ends: 2498 [2021-04-15 05:20:16,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 6147.4ms TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:20:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-04-15 05:20:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1959. [2021-04-15 05:20:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 3.397344228804903) internal successors, (6652), 1958 states have internal predecessors, (6652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 6652 transitions. [2021-04-15 05:20:16,160 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 6652 transitions. Word has length 26 [2021-04-15 05:20:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:16,161 INFO L480 AbstractCegarLoop]: Abstraction has 1959 states and 6652 transitions. [2021-04-15 05:20:16,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 6652 transitions. [2021-04-15 05:20:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:20:16,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:16,163 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:16,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3065,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:16,364 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:16,364 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 46 times [2021-04-15 05:20:16,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:16,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623184793] [2021-04-15 05:20:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:16,786 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-04-15 05:20:17,273 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-04-15 05:20:17,541 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-04-15 05:20:17,813 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-04-15 05:20:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:17,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623184793] [2021-04-15 05:20:17,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45034427] [2021-04-15 05:20:17,929 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 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 [2021-04-15 05:20:17,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:20:17,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:17,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:20:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:18,685 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:20:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,809 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:18,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-04-15 05:20:18,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:18,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-04-15 05:20:18,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:18,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-04-15 05:20:18,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:18,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,961 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:18,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-04-15 05:20:18,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-04-15 05:20:19,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:19,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:20:19,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,106 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:19,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-04-15 05:20:19,110 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,167 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:20:19,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-04-15 05:20:19,173 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,214 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:19,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-04-15 05:20:19,218 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,260 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:19,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-04-15 05:20:19,264 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,304 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:19,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-04-15 05:20:19,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-04-15 05:20:19,377 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,434 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:20:19,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-04-15 05:20:19,440 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,480 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:19,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-04-15 05:20:19,484 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:19,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-04-15 05:20:19,546 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:19,580 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:20:19,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-04-15 05:20:19,587 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:19,917 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:20:19,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:19,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:20:19,921 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-04-15 05:20:20,346 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:20:20,688 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-04-15 05:20:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:20,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:20,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:20:20,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570645184] [2021-04-15 05:20:20,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:20:20,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:20:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:20:20,741 INFO L87 Difference]: Start difference. First operand 1959 states and 6652 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:21,096 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-04-15 05:20:21,411 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:20:21,994 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-04-15 05:20:22,589 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:20:22,795 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-04-15 05:20:23,147 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 05:20:23,601 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2021-04-15 05:20:24,355 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-04-15 05:20:24,937 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-04-15 05:20:25,415 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:20:26,078 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-04-15 05:20:27,214 WARN L205 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-04-15 05:20:28,456 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-04-15 05:20:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:28,949 INFO L93 Difference]: Finished difference Result 2496 states and 8344 transitions. [2021-04-15 05:20:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:20:28,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:20:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:28,956 INFO L225 Difference]: With dead ends: 2496 [2021-04-15 05:20:28,956 INFO L226 Difference]: Without dead ends: 2481 [2021-04-15 05:20:28,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 8666.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:20:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-04-15 05:20:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1977. [2021-04-15 05:20:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 3.395242914979757) internal successors, (6709), 1976 states have internal predecessors, (6709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 6709 transitions. [2021-04-15 05:20:28,980 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 6709 transitions. Word has length 26 [2021-04-15 05:20:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:28,980 INFO L480 AbstractCegarLoop]: Abstraction has 1977 states and 6709 transitions. [2021-04-15 05:20:28,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 6709 transitions. [2021-04-15 05:20:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:20:28,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:28,982 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:29,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3126 [2021-04-15 05:20:29,182 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-04-15 05:20:29,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:29,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585931819] [2021-04-15 05:20:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:29,641 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-04-15 05:20:29,968 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-04-15 05:20:30,118 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-04-15 05:20:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585931819] [2021-04-15 05:20:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696115436] [2021-04-15 05:20:30,324 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 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 [2021-04-15 05:20:30,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:20:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:20:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:31,046 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:20:31,733 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-04-15 05:20:32,069 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_402], 3=[v_prenex_404, A, v_prenex_403]} [2021-04-15 05:20:32,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:32,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:32,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:20:32,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:32,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:32,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:20:32,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:32,728 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 05:20:32,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:32,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:32,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:32,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:20:32,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:32,827 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:20:32,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-04-15 05:20:32,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:33,379 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-04-15 05:20:33,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:33,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:33,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:33,435 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:20:33,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-04-15 05:20:33,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:33,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:33,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:20:33,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:33,983 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-04-15 05:20:33,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:34,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:34,033 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:20:34,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-04-15 05:20:34,039 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:34,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:34,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-04-15 05:20:34,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:34,523 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-04-15 05:20:34,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:34,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:20:34,540 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:387, output treesize:208 [2021-04-15 05:20:34,966 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:20:35,268 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-04-15 05:20:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:35,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:35,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:20:35,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967432475] [2021-04-15 05:20:35,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:20:35,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:20:35,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:20:35,360 INFO L87 Difference]: Start difference. First operand 1977 states and 6709 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:35,994 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-04-15 05:20:36,681 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 05:20:37,140 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:20:37,517 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-04-15 05:20:38,242 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:20:39,010 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-04-15 05:20:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:39,276 INFO L93 Difference]: Finished difference Result 2549 states and 8489 transitions. [2021-04-15 05:20:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:20:39,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:20:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:39,282 INFO L225 Difference]: With dead ends: 2549 [2021-04-15 05:20:39,282 INFO L226 Difference]: Without dead ends: 2524 [2021-04-15 05:20:39,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 5351.2ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:20:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-04-15 05:20:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1981. [2021-04-15 05:20:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.3954545454545455) internal successors, (6723), 1980 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6723 transitions. [2021-04-15 05:20:39,305 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6723 transitions. Word has length 26 [2021-04-15 05:20:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:39,305 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6723 transitions. [2021-04-15 05:20:39,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6723 transitions. [2021-04-15 05:20:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:20:39,307 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:39,307 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:39,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3144 [2021-04-15 05:20:39,509 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-04-15 05:20:39,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592015901] [2021-04-15 05:20:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:39,906 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-04-15 05:20:40,209 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-04-15 05:20:40,414 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 05:20:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:40,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592015901] [2021-04-15 05:20:40,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546039385] [2021-04-15 05:20:40,625 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 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 [2021-04-15 05:20:40,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:20:40,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:40,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:20:40,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:41,276 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:20:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,381 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:41,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:20:41,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,415 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:20:41,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:41,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:20:41,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,501 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:41,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:20:41,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:41,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:20:41,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,593 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:41,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:20:41,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:41,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:20:41,643 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,675 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:41,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:20:41,679 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:41,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:20:41,726 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:41,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:20:41,782 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,815 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:41,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:20:41,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:41,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:20:41,852 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,898 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:20:41,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:20:41,904 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:41,945 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:20:41,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:20:41,952 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:41,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:42,001 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:20:42,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:20:42,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:42,025 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:20:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:20:42,028 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:42,323 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:20:42,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:42,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:20:42,327 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:20:42,703 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:20:43,051 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:20:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:43,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:43,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:20:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021303111] [2021-04-15 05:20:43,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:20:43,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:20:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:20:43,105 INFO L87 Difference]: Start difference. First operand 1981 states and 6723 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:43,726 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 05:20:44,245 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-04-15 05:20:44,645 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-04-15 05:20:45,276 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-04-15 05:20:46,406 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-04-15 05:20:47,263 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 05:20:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:47,600 INFO L93 Difference]: Finished difference Result 2502 states and 8362 transitions. [2021-04-15 05:20:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:20:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:20:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:47,607 INFO L225 Difference]: With dead ends: 2502 [2021-04-15 05:20:47,607 INFO L226 Difference]: Without dead ends: 2487 [2021-04-15 05:20:47,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 5131.5ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:20:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-04-15 05:20:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1981. [2021-04-15 05:20:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.3954545454545455) internal successors, (6723), 1980 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6723 transitions. [2021-04-15 05:20:47,631 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6723 transitions. Word has length 26 [2021-04-15 05:20:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:47,631 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6723 transitions. [2021-04-15 05:20:47,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6723 transitions. [2021-04-15 05:20:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:20:47,633 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:47,633 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:47,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:47,835 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 54 times [2021-04-15 05:20:47,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:47,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461460840] [2021-04-15 05:20:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:48,071 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 05:20:48,295 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-04-15 05:20:48,426 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-04-15 05:20:48,673 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-04-15 05:20:48,917 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-04-15 05:20:49,160 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 05:20:49,298 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-04-15 05:20:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:49,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461460840] [2021-04-15 05:20:49,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038073265] [2021-04-15 05:20:49,301 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 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 [2021-04-15 05:20:49,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:20:49,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:20:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:49,713 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 05:20:49,959 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:20:50,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:20:50,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:20:50,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:20:50,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:20:50,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:20:50,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:20:50,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:20:50,175 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:20:50,194 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:20:50,212 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:20:50,230 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:20:50,249 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:20:50,266 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:20:50,284 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:20:50,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:20:50,318 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:50,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-04-15 05:20:50,331 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:50,445 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-04-15 05:20:50,446 INFO L628 ElimStorePlain]: treesize reduction 28, result has 49.1 percent of original size [2021-04-15 05:20:50,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:20:50,449 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:27 [2021-04-15 05:20:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:50,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:50,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:20:50,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971801285] [2021-04-15 05:20:50,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:20:50,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:50,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:20:50,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:20:50,583 INFO L87 Difference]: Start difference. First operand 1981 states and 6723 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:51,400 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:20:52,020 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:20:52,409 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:20:52,835 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-04-15 05:20:53,238 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-04-15 05:20:53,480 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-04-15 05:20:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:53,499 INFO L93 Difference]: Finished difference Result 2559 states and 8205 transitions. [2021-04-15 05:20:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:20:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:20:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:53,505 INFO L225 Difference]: With dead ends: 2559 [2021-04-15 05:20:53,506 INFO L226 Difference]: Without dead ends: 2522 [2021-04-15 05:20:53,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4174.6ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:20:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-04-15 05:20:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2001. [2021-04-15 05:20:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 3.3945) internal successors, (6789), 2000 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6789 transitions. [2021-04-15 05:20:53,530 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6789 transitions. Word has length 26 [2021-04-15 05:20:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:53,530 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 6789 transitions. [2021-04-15 05:20:53,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6789 transitions. [2021-04-15 05:20:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:20:53,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:53,533 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:53,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3195,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:53,733 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 55 times [2021-04-15 05:20:53,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:53,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610015192] [2021-04-15 05:20:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:53,974 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-04-15 05:20:54,297 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 05:20:54,583 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-04-15 05:20:54,953 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-04-15 05:20:55,155 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 05:20:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:55,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610015192] [2021-04-15 05:20:55,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103811866] [2021-04-15 05:20:55,373 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 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 [2021-04-15 05:20:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:20:55,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:56,104 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:20:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:20:56,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:20:56,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:20:56,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:20:56,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:20:56,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:20:56,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:20:56,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:20:56,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:20:56,310 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:20:56,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:20:56,348 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:20:56,366 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:20:56,383 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:20:56,401 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:20:56,418 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:56,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-04-15 05:20:56,430 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:56,538 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-04-15 05:20:56,539 INFO L628 ElimStorePlain]: treesize reduction 28, result has 49.1 percent of original size [2021-04-15 05:20:56,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:20:56,541 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:27 [2021-04-15 05:20:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:56,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:56,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:20:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339717111] [2021-04-15 05:20:56,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:20:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:20:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:20:56,707 INFO L87 Difference]: Start difference. First operand 2001 states and 6789 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:57,125 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2021-04-15 05:20:57,487 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-04-15 05:20:57,712 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:20:58,143 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-04-15 05:20:58,561 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-04-15 05:20:59,036 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-04-15 05:20:59,328 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 05:20:59,539 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-04-15 05:21:00,533 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-04-15 05:21:01,361 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-04-15 05:21:01,957 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-04-15 05:21:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:02,400 INFO L93 Difference]: Finished difference Result 2451 states and 8116 transitions. [2021-04-15 05:21:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:21:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:21:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:02,407 INFO L225 Difference]: With dead ends: 2451 [2021-04-15 05:21:02,407 INFO L226 Difference]: Without dead ends: 2405 [2021-04-15 05:21:02,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 6758.3ms TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:21:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-04-15 05:21:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2001. [2021-04-15 05:21:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 3.3895) internal successors, (6779), 2000 states have internal predecessors, (6779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6779 transitions. [2021-04-15 05:21:02,429 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6779 transitions. Word has length 26 [2021-04-15 05:21:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:02,429 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 6779 transitions. [2021-04-15 05:21:02,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6779 transitions. [2021-04-15 05:21:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:21:02,431 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:02,431 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:02,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3201,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:02,632 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 56 times [2021-04-15 05:21:02,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:02,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844473250] [2021-04-15 05:21:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:02,872 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-04-15 05:21:03,076 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-04-15 05:21:03,216 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-04-15 05:21:03,508 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:21:03,747 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-04-15 05:21:03,882 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 05:21:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844473250] [2021-04-15 05:21:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88841406] [2021-04-15 05:21:04,007 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 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 [2021-04-15 05:21:04,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:21:04,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:21:04,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:04,706 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:21:05,447 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-04-15 05:21:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:06,434 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:21:06,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-04-15 05:21:06,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:06,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:06,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-04-15 05:21:06,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:07,845 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 155 [2021-04-15 05:21:07,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:07,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:07,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-04-15 05:21:07,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:08,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:08,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:08,047 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 05:21:08,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-04-15 05:21:08,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:09,224 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 149 [2021-04-15 05:21:09,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:09,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:09,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:09,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:09,357 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:21:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-04-15 05:21:09,373 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:09,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:09,421 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 05:21:09,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:21:09,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:10,483 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 136 [2021-04-15 05:21:10,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:10,621 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:21:10,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-04-15 05:21:10,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:10,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:10,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:10,691 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 05:21:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:21:10,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:11,671 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-04-15 05:21:11,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:11,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-04-15 05:21:11,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:11,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:11,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:11,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:11,930 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:21:11,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-04-15 05:21:11,944 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:13,762 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 125 DAG size of output: 115 [2021-04-15 05:21:13,763 INFO L628 ElimStorePlain]: treesize reduction 54, result has 91.1 percent of original size [2021-04-15 05:21:13,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:13,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:13,919 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-04-15 05:21:13,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-04-15 05:21:13,933 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:13,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:14,030 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:21:14,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-04-15 05:21:14,046 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:14,863 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-04-15 05:21:14,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:14,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:14,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:14,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:14,982 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:21:14,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:21:14,989 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:15,090 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:21:15,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-04-15 05:21:15,099 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:15,916 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-04-15 05:21:15,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:15,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:16,050 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:21:16,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-04-15 05:21:16,056 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:16,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:16,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:16,148 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:21:16,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-04-15 05:21:16,154 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:16,921 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-04-15 05:21:16,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:16,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-04-15 05:21:16,951 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:889, output treesize:585 [2021-04-15 05:21:17,510 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-04-15 05:21:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:17,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:17,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:21:17,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258395497] [2021-04-15 05:21:17,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:21:17,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:17,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:21:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:21:17,611 INFO L87 Difference]: Start difference. First operand 2001 states and 6779 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:17,808 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-04-15 05:21:18,559 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-04-15 05:21:18,774 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 05:21:19,370 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-04-15 05:21:19,774 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 05:21:20,371 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:21:20,777 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 05:21:21,188 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 05:21:21,879 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-04-15 05:21:22,780 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 05:21:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:23,660 INFO L93 Difference]: Finished difference Result 2548 states and 8505 transitions. [2021-04-15 05:21:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:21:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:21:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:23,668 INFO L225 Difference]: With dead ends: 2548 [2021-04-15 05:21:23,668 INFO L226 Difference]: Without dead ends: 2533 [2021-04-15 05:21:23,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 6481.5ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:21:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-04-15 05:21:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2016. [2021-04-15 05:21:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.3955334987593053) internal successors, (6842), 2015 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6842 transitions. [2021-04-15 05:21:23,691 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6842 transitions. Word has length 26 [2021-04-15 05:21:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:23,691 INFO L480 AbstractCegarLoop]: Abstraction has 2016 states and 6842 transitions. [2021-04-15 05:21:23,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6842 transitions. [2021-04-15 05:21:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:21:23,694 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:23,694 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:23,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3207 [2021-04-15 05:21:23,894 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:23,894 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-04-15 05:21:23,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:23,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640893802] [2021-04-15 05:21:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:24,407 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-04-15 05:21:24,886 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-04-15 05:21:25,196 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:21:25,508 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 05:21:25,801 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-04-15 05:21:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640893802] [2021-04-15 05:21:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505252985] [2021-04-15 05:21:25,911 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 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 [2021-04-15 05:21:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:21:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:26,556 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:21:26,780 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:21:27,661 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 05:21:27,780 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_423, v_prenex_425]} [2021-04-15 05:21:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:21:27,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:28,299 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:21:28,300 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-04-15 05:21:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:28,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:28,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:28,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:21:28,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:28,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:28,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:21:28,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:28,516 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:21:28,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:28,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:28,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:21:28,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:28,699 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:21:28,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:28,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:21:28,707 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-04-15 05:21:28,876 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:21:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:28,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:28,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:21:28,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216384973] [2021-04-15 05:21:28,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:21:28,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:21:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:21:28,939 INFO L87 Difference]: Start difference. First operand 2016 states and 6842 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:29,185 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-04-15 05:21:29,355 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-04-15 05:21:29,538 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:21:29,952 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:21:30,343 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-04-15 05:21:30,677 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-04-15 05:21:31,067 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-04-15 05:21:31,702 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-04-15 05:21:32,574 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-04-15 05:21:32,988 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:21:33,868 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-04-15 05:21:34,231 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:21:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:34,387 INFO L93 Difference]: Finished difference Result 2516 states and 8361 transitions. [2021-04-15 05:21:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:21:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:21:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:34,394 INFO L225 Difference]: With dead ends: 2516 [2021-04-15 05:21:34,394 INFO L226 Difference]: Without dead ends: 2501 [2021-04-15 05:21:34,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 7346.3ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:21:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-04-15 05:21:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2027. [2021-04-15 05:21:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.395853899308983) internal successors, (6880), 2026 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6880 transitions. [2021-04-15 05:21:34,417 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6880 transitions. Word has length 26 [2021-04-15 05:21:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:34,417 INFO L480 AbstractCegarLoop]: Abstraction has 2027 states and 6880 transitions. [2021-04-15 05:21:34,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6880 transitions. [2021-04-15 05:21:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:21:34,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:34,419 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:34,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:34,619 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 57 times [2021-04-15 05:21:34,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:34,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445623839] [2021-04-15 05:21:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:34,983 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-04-15 05:21:35,344 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-04-15 05:21:35,588 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-04-15 05:21:35,799 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-04-15 05:21:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:35,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445623839] [2021-04-15 05:21:35,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593664475] [2021-04-15 05:21:35,876 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 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 [2021-04-15 05:21:35,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:21:35,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:21:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:36,473 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:21:36,700 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:21:37,007 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:21:38,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-04-15 05:21:38,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:21:38,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:21:38,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-04-15 05:21:38,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:21:38,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:21:38,266 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:21:38,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:21:38,337 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-04-15 05:21:38,377 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:21:38,413 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:21:38,450 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:21:38,490 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:21:38,532 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:21:38,571 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:21:38,604 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:38,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:21:38,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-04-15 05:21:38,621 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:38,770 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-04-15 05:21:38,771 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-04-15 05:21:38,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:21:38,774 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-04-15 05:21:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:38,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:38,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:21:38,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369050095] [2021-04-15 05:21:38,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:21:38,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:38,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:21:38,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:21:38,904 INFO L87 Difference]: Start difference. First operand 2027 states and 6880 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:39,610 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-04-15 05:21:40,570 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-04-15 05:21:40,952 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:21:41,335 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:21:41,813 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:21:42,399 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-04-15 05:21:42,809 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:21:43,288 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-04-15 05:21:43,630 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-04-15 05:21:43,832 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 05:21:44,219 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 05:21:44,385 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 05:21:44,728 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-04-15 05:21:44,937 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-04-15 05:21:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:45,024 INFO L93 Difference]: Finished difference Result 3330 states and 10522 transitions. [2021-04-15 05:21:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:21:45,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:21:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:45,032 INFO L225 Difference]: With dead ends: 3330 [2021-04-15 05:21:45,033 INFO L226 Difference]: Without dead ends: 3300 [2021-04-15 05:21:45,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 6529.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:21:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2021-04-15 05:21:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2065. [2021-04-15 05:21:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.3997093023255816) internal successors, (7017), 2064 states have internal predecessors, (7017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7017 transitions. [2021-04-15 05:21:45,061 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7017 transitions. Word has length 26 [2021-04-15 05:21:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:45,061 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 7017 transitions. [2021-04-15 05:21:45,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7017 transitions. [2021-04-15 05:21:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:21:45,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:45,063 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:45,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-04-15 05:21:45,263 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-04-15 05:21:45,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:45,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217176126] [2021-04-15 05:21:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:45,656 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-04-15 05:21:46,028 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 05:21:46,337 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 05:21:46,592 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-04-15 05:21:46,846 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-04-15 05:21:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:46,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217176126] [2021-04-15 05:21:46,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267496905] [2021-04-15 05:21:46,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:46,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:21:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:21:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:47,627 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:21:48,022 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-04-15 05:21:48,927 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-04-15 05:21:50,037 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_451, v_prenex_453, v_prenex_454, v_prenex_456], 6=[v_prenex_450, v_prenex_446, v_prenex_447]} [2021-04-15 05:21:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:50,134 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:21:50,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-04-15 05:21:50,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:51,560 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 159 DAG size of output: 144 [2021-04-15 05:21:51,561 INFO L628 ElimStorePlain]: treesize reduction 191, result has 68.9 percent of original size [2021-04-15 05:21:51,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:51,646 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:21:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-04-15 05:21:51,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:52,270 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-04-15 05:21:52,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:52,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:52,363 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:21:52,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-04-15 05:21:52,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:52,991 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-04-15 05:21:52,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:53,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:53,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-04-15 05:21:53,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:53,692 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-04-15 05:21:53,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:53,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-04-15 05:21:53,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:54,369 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-04-15 05:21:54,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:54,455 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-04-15 05:21:54,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 29 [2021-04-15 05:21:54,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:55,100 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-04-15 05:21:55,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:55,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:55,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:55,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2021-04-15 05:21:55,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:55,804 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-04-15 05:21:55,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:55,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:55,881 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:21:55,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-04-15 05:21:55,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:56,434 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-04-15 05:21:56,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:56,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:21:56,462 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:624, output treesize:477 [2021-04-15 05:21:57,933 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-04-15 05:21:58,886 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-04-15 05:21:59,280 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-04-15 05:21:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:59,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:59,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:21:59,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514389584] [2021-04-15 05:21:59,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:21:59,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:59,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:21:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:21:59,315 INFO L87 Difference]: Start difference. First operand 2065 states and 7017 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:59,709 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-04-15 05:21:59,950 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-04-15 05:22:00,160 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:22:00,901 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 05:22:01,088 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:22:01,865 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-04-15 05:22:02,394 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-04-15 05:22:03,019 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 56 [2021-04-15 05:22:04,756 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2021-04-15 05:22:05,021 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-04-15 05:22:05,822 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:22:07,117 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2021-04-15 05:22:08,077 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-04-15 05:22:11,005 WARN L205 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-04-15 05:22:12,912 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 149 DAG size of output: 115 [2021-04-15 05:22:13,798 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 05:22:16,609 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2021-04-15 05:22:17,937 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:22:20,126 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2021-04-15 05:22:22,094 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-04-15 05:22:24,263 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2021-04-15 05:22:25,732 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-04-15 05:22:28,293 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 126 DAG size of output: 81 [2021-04-15 05:22:30,063 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2021-04-15 05:22:32,124 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 132 DAG size of output: 57 [2021-04-15 05:22:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:32,756 INFO L93 Difference]: Finished difference Result 2822 states and 9262 transitions. [2021-04-15 05:22:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:22:32,759 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:22:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:32,764 INFO L225 Difference]: With dead ends: 2822 [2021-04-15 05:22:32,764 INFO L226 Difference]: Without dead ends: 2807 [2021-04-15 05:22:32,764 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 33750.2ms TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:22:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-04-15 05:22:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2071. [2021-04-15 05:22:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2070 states have (on average 3.4009661835748792) internal successors, (7040), 2070 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 7040 transitions. [2021-04-15 05:22:32,790 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 7040 transitions. Word has length 26 [2021-04-15 05:22:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:32,790 INFO L480 AbstractCegarLoop]: Abstraction has 2071 states and 7040 transitions. [2021-04-15 05:22:32,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 7040 transitions. [2021-04-15 05:22:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:22:32,792 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:32,792 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:32,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:32,993 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:32,993 INFO L82 PathProgramCache]: Analyzing trace with hash 719147274, now seen corresponding path program 51 times [2021-04-15 05:22:32,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:32,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312331796] [2021-04-15 05:22:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:33,439 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-04-15 05:22:33,768 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-04-15 05:22:34,095 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 05:22:34,394 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-04-15 05:22:34,530 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-04-15 05:22:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:34,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312331796] [2021-04-15 05:22:34,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923027870] [2021-04-15 05:22:34,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:34,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:22:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:22:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:35,091 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:22:35,844 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:22:36,598 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-04-15 05:22:36,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:36,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:36,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:22:36,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:38,142 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 155 DAG size of output: 150 [2021-04-15 05:22:38,143 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-04-15 05:22:38,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:38,231 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:22:38,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:22:38,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:38,796 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-04-15 05:22:38,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:38,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:38,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:22:38,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:39,453 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-04-15 05:22:39,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:39,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:39,553 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:22:39,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:22:39,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:40,113 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-04-15 05:22:40,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:40,219 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:22:40,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:22:40,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:40,785 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-04-15 05:22:40,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:40,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:40,866 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:22:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:22:40,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:41,457 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-04-15 05:22:41,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:41,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:41,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:22:41,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:42,584 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2021-04-15 05:22:42,586 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-04-15 05:22:42,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:22:42,700 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:22:42,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:22:42,706 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:22:43,228 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-04-15 05:22:43,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:22:43,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:22:43,278 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-04-15 05:22:44,316 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-04-15 05:22:44,707 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:22:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:44,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:44,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:22:44,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343849095] [2021-04-15 05:22:44,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:22:44,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:44,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:22:44,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:22:44,802 INFO L87 Difference]: Start difference. First operand 2071 states and 7040 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:45,059 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-04-15 05:22:45,368 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 20 [2021-04-15 05:22:45,579 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:22:46,073 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 05:22:46,753 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 26 [2021-04-15 05:22:47,195 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-04-15 05:22:48,027 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-04-15 05:22:48,747 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-04-15 05:22:49,303 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 38 [2021-04-15 05:22:50,991 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-04-15 05:22:51,645 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:22:52,020 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 05:22:52,825 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:22:53,124 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:22:55,708 WARN L205 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-04-15 05:22:57,418 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 125 DAG size of output: 59 [2021-04-15 05:22:58,997 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-04-15 05:23:01,909 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 135 DAG size of output: 63 [2021-04-15 05:23:05,574 WARN L205 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-04-15 05:23:07,074 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-04-15 05:23:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:07,349 INFO L93 Difference]: Finished difference Result 2909 states and 9527 transitions. [2021-04-15 05:23:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:23:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:23:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:07,357 INFO L225 Difference]: With dead ends: 2909 [2021-04-15 05:23:07,358 INFO L226 Difference]: Without dead ends: 2894 [2021-04-15 05:23:07,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 24550.1ms TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:23:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-04-15 05:23:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2077. [2021-04-15 05:23:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 3.397880539499037) internal successors, (7054), 2076 states have internal predecessors, (7054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 7054 transitions. [2021-04-15 05:23:07,385 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 7054 transitions. Word has length 26 [2021-04-15 05:23:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:07,386 INFO L480 AbstractCegarLoop]: Abstraction has 2077 states and 7054 transitions. [2021-04-15 05:23:07,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 7054 transitions. [2021-04-15 05:23:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:23:07,388 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:07,388 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:07,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3425,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:07,588 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 718335260, now seen corresponding path program 58 times [2021-04-15 05:23:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:07,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117805208] [2021-04-15 05:23:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:07,872 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-04-15 05:23:08,119 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-04-15 05:23:08,503 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-04-15 05:23:08,952 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 05:23:09,386 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-04-15 05:23:09,801 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-04-15 05:23:10,195 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-04-15 05:23:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:10,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117805208] [2021-04-15 05:23:10,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544128389] [2021-04-15 05:23:10,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:10,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:23:10,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:23:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:10,784 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:23:11,061 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:23:11,383 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:23:12,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-04-15 05:23:12,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:23:12,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-04-15 05:23:12,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:23:12,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-04-15 05:23:12,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-04-15 05:23:12,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:23:12,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-04-15 05:23:12,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-04-15 05:23:12,978 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:12,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:12,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-04-15 05:23:13,017 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:13,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-04-15 05:23:13,056 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:13,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:23:13,094 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-04-15 05:23:13,133 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:13,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:23:13,170 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:13,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-04-15 05:23:13,209 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:13,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:13,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:23:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:23:13,235 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:13,405 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 05:23:13,406 INFO L628 ElimStorePlain]: treesize reduction 18, result has 64.7 percent of original size [2021-04-15 05:23:13,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:23:13,411 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:809, output treesize:21 [2021-04-15 05:23:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:13,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:13,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:23:13,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777389536] [2021-04-15 05:23:13,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:23:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:23:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:23:13,568 INFO L87 Difference]: Start difference. First operand 2077 states and 7054 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:13,861 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-04-15 05:23:14,173 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 05:23:14,384 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-04-15 05:23:14,599 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 05:23:14,780 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:23:15,182 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:23:15,492 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:23:15,891 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-04-15 05:23:16,158 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:23:16,487 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:23:17,242 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-04-15 05:23:17,636 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-04-15 05:23:18,491 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-04-15 05:23:18,976 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-04-15 05:23:19,643 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-04-15 05:23:20,394 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-04-15 05:23:21,595 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-04-15 05:23:22,272 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 05:23:22,696 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:23:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:23,045 INFO L93 Difference]: Finished difference Result 3410 states and 10971 transitions. [2021-04-15 05:23:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:23:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:23:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:23,055 INFO L225 Difference]: With dead ends: 3410 [2021-04-15 05:23:23,055 INFO L226 Difference]: Without dead ends: 3373 [2021-04-15 05:23:23,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 9827.2ms TimeCoverageRelationStatistics Valid=374, Invalid=1266, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:23:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-04-15 05:23:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2094. [2021-04-15 05:23:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.4046822742474916) internal successors, (7126), 2093 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7126 transitions. [2021-04-15 05:23:23,085 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7126 transitions. Word has length 26 [2021-04-15 05:23:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:23,085 INFO L480 AbstractCegarLoop]: Abstraction has 2094 states and 7126 transitions. [2021-04-15 05:23:23,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7126 transitions. [2021-04-15 05:23:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:23:23,087 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:23,087 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:23,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3453,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:23,288 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 59 times [2021-04-15 05:23:23,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:23,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631816407] [2021-04-15 05:23:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:23,724 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 05:23:23,931 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2021-04-15 05:23:24,286 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 05:23:24,635 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-04-15 05:23:24,782 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-04-15 05:23:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:24,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631816407] [2021-04-15 05:23:24,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791202796] [2021-04-15 05:23:24,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:24,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:23:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:23:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:25,623 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:23:26,040 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 05:23:26,940 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-04-15 05:23:28,691 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-04-15 05:23:30,625 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_490, v_prenex_485, v_prenex_486], 6=[v_prenex_491, v_prenex_487, v_prenex_488, v_prenex_489]} [2021-04-15 05:23:30,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:30,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:30,814 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 05:23:30,815 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:23:30,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2021-04-15 05:23:30,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:30,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:30,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:30,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:30,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-04-15 05:23:30,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:32,841 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 160 [2021-04-15 05:23:32,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:32,993 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-04-15 05:23:32,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:23:33,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:33,138 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-04-15 05:23:33,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:23:33,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:35,011 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 151 [2021-04-15 05:23:35,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:35,159 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-04-15 05:23:35,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:23:35,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:35,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:35,279 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-04-15 05:23:35,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:23:35,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:37,106 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 145 [2021-04-15 05:23:37,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:37,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:37,301 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-04-15 05:23:37,302 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:23:37,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-04-15 05:23:37,319 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:37,457 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-04-15 05:23:37,458 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:23:37,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-04-15 05:23:37,476 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:39,143 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 137 [2021-04-15 05:23:39,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:39,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:39,342 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-04-15 05:23:39,343 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-04-15 05:23:39,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 43 [2021-04-15 05:23:39,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:39,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:39,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-04-15 05:23:39,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:44,884 WARN L205 SmtUtils]: Spent 5.40 s on a formula simplification. DAG size of input: 145 DAG size of output: 138 [2021-04-15 05:23:44,886 INFO L628 ElimStorePlain]: treesize reduction 26, result has 96.7 percent of original size [2021-04-15 05:23:44,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:44,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:44,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:45,050 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:23:45,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 33 [2021-04-15 05:23:45,061 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:45,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:45,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:45,190 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:23:45,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 33 [2021-04-15 05:23:45,197 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:48,609 WARN L205 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2021-04-15 05:23:48,611 INFO L628 ElimStorePlain]: treesize reduction 13, result has 98.2 percent of original size [2021-04-15 05:23:48,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:48,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:48,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:48,757 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:23:48,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:23:48,765 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:48,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:48,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:48,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:48,821 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:23:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:23:48,826 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:50,365 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 122 [2021-04-15 05:23:50,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:50,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:50,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:50,573 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-04-15 05:23:50,574 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-04-15 05:23:50,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 43 [2021-04-15 05:23:50,595 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:50,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:23:50,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:23:50,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-04-15 05:23:50,744 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:23:53,573 WARN L205 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-04-15 05:23:53,575 INFO L628 ElimStorePlain]: treesize reduction 34, result has 94.6 percent of original size [2021-04-15 05:23:53,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-04-15 05:23:53,641 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:905, output treesize:705 [2021-04-15 05:23:54,479 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2021-04-15 05:23:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:54,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:54,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-04-15 05:23:54,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267679014] [2021-04-15 05:23:54,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:23:54,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:23:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:23:54,923 INFO L87 Difference]: Start difference. First operand 2094 states and 7126 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:55,278 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-04-15 05:23:55,568 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:23:55,981 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:23:56,504 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-04-15 05:23:56,733 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:23:57,441 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-04-15 05:23:57,938 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 05:23:58,491 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:23:59,308 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-04-15 05:24:00,362 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-04-15 05:24:01,089 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 05:24:02,097 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-04-15 05:24:02,659 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:24:06,527 WARN L205 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 109 DAG size of output: 95 [2021-04-15 05:24:07,722 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-04-15 05:24:11,327 WARN L205 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 129 DAG size of output: 125 [2021-04-15 05:24:15,509 WARN L205 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 120 DAG size of output: 100 [2021-04-15 05:24:18,194 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 115 DAG size of output: 100 [2021-04-15 05:24:20,261 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-04-15 05:24:23,301 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 134 DAG size of output: 105 [2021-04-15 05:24:24,360 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 58 [2021-04-15 05:24:27,406 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 148 DAG size of output: 109 [2021-04-15 05:24:30,715 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-04-15 05:24:33,044 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 140 DAG size of output: 127 [2021-04-15 05:24:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:35,022 INFO L93 Difference]: Finished difference Result 4195 states and 13349 transitions. [2021-04-15 05:24:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:24:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:24:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:35,033 INFO L225 Difference]: With dead ends: 4195 [2021-04-15 05:24:35,033 INFO L226 Difference]: Without dead ends: 4151 [2021-04-15 05:24:35,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 39692.5ms TimeCoverageRelationStatistics Valid=455, Invalid=1801, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:24:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-04-15 05:24:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 2219. [2021-04-15 05:24:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2218 states have (on average 3.4192966636609556) internal successors, (7584), 2218 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 7584 transitions. [2021-04-15 05:24:35,068 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 7584 transitions. Word has length 26 [2021-04-15 05:24:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:35,068 INFO L480 AbstractCegarLoop]: Abstraction has 2219 states and 7584 transitions. [2021-04-15 05:24:35,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 7584 transitions. [2021-04-15 05:24:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:24:35,071 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:35,071 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:24:35,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-04-15 05:24:35,271 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1912368818, now seen corresponding path program 52 times [2021-04-15 05:24:35,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:35,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295141535] [2021-04-15 05:24:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:35,820 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-04-15 05:24:36,255 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 05:24:36,450 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:24:36,811 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-04-15 05:24:37,171 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 05:24:37,322 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-04-15 05:24:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295141535] [2021-04-15 05:24:37,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530531225] [2021-04-15 05:24:37,327 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 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 [2021-04-15 05:24:37,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:24:37,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:24:37,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:37,872 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:24:38,354 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:24:39,356 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-04-15 05:24:40,512 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-04-15 05:24:40,842 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_499, v_prenex_500], 3=[A, v_prenex_501]} [2021-04-15 05:24:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:24:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:24:40,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:24:40,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:24:40,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:24:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:24:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:24:40,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:24:40,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:24:41,764 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-04-15 05:24:41,765 INFO L628 ElimStorePlain]: treesize reduction 108, result has 55.6 percent of original size [2021-04-15 05:24:41,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:24:41,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:24:41,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:24:41,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:24:41,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:24:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:24:41,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:24:41,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:24:41,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:24:42,084 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:24:42,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:24:42,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:24:42,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:24:42,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:24:42,363 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:24:42,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:24:42,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:24:42,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-04-15 05:24:42,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:24:42,617 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 05:24:42,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:24:42,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:24:42,625 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-04-15 05:24:42,863 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:24:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:42,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:42,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:24:42,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845913973] [2021-04-15 05:24:42,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:24:42,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:24:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:24:42,946 INFO L87 Difference]: Start difference. First operand 2219 states and 7584 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:43,205 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-04-15 05:24:43,441 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-04-15 05:24:43,680 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:24:44,208 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:24:44,826 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-04-15 05:24:45,233 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-04-15 05:24:45,931 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-04-15 05:24:46,508 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:24:47,061 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-04-15 05:24:47,620 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-04-15 05:24:48,704 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-04-15 05:24:48,968 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 38 Received shutdown request... [2021-04-15 05:24:49,908 WARN L222 SmtUtils]: Removed 9 from assertion stack [2021-04-15 05:24:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:24:50,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-04-15 05:24:50,109 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 05:24:50,111 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 05:24:50,112 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:24:50 BasicIcfg [2021-04-15 05:24:50,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:24:50,112 INFO L168 Benchmark]: Toolchain (without parser) took 830712.53 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 236.6 MB in the beginning and 325.5 MB in the end (delta: -88.9 MB). Peak memory consumption was 181.0 MB. Max. memory is 16.0 GB. [2021-04-15 05:24:50,112 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:24:50,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.70 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:24:50,112 INFO L168 Benchmark]: Boogie Preprocessor took 12.98 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 999.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:24:50,112 INFO L168 Benchmark]: RCFGBuilder took 189.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 237.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. [2021-04-15 05:24:50,112 INFO L168 Benchmark]: TraceAbstraction took 830484.62 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 236.9 MB in the beginning and 325.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 179.2 MB. Max. memory is 16.0 GB. [2021-04-15 05:24:50,113 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.70 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.98 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 999.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 189.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 237.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 830484.62 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 236.9 MB in the beginning and 325.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 179.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (2219states) and FLOYD_HOARE automaton (currently 20 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 406ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 830417.4ms, OverallIterations: 114, TraceHistogramMax: 2, EmptinessCheckTime: 234.7ms, AutomataDifference: 481985.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4685 SDtfs, 23039 SDslu, 35093 SDs, 0 SdLazy, 66219 SolverSat, 3853 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59594.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6064 GetRequests, 2062 SyntacticMatches, 122 SemanticMatches, 3879 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45368 ImplicationChecksByTransitivity, 522485.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2219occurred in iteration=113, InterpolantAutomatonStates: 2944, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2495.0ms AutomataMinimizationTime, 113 MinimizatonAttempts, 85346 StatesRemovedByMinimization, 113 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 347.5ms SsaConstructionTime, 1258.5ms SatisfiabilityAnalysisTime, 319287.5ms InterpolantComputationTime, 5662 NumberOfCodeBlocks, 5662 NumberOfCodeBlocksAsserted, 357 NumberOfCheckSat, 5437 ConstructedInterpolants, 167 QuantifiedInterpolants, 182791 SizeOfPredicates, 661 NumberOfNonLiveVariables, 7338 ConjunctsInSsa, 2305 ConjunctsInUnsatCore, 225 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1318 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